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Piper PA-24-180 Comanche, Airplane Service Manual

The Piper PA-24-180 Comanche Airplane Service Manual is a comprehensive guide for maintaining and repairing this iconic aircraft. Download the manual for free from manualshive.com to access detailed instructions and diagrams for keeping your Comanche in top condition. A must-have resource for all owners and enthusiasts.

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Summary of Contents for PA-24-180 Comanche

Page 1: ...PIPER AIRPLANE SERVICE MANUAL CARD 10F 3 COMANCHE PA 24 180 PA 24 250 PA 24 260 PA 24 260 TURBO PA 24 400 PIPER AIRCRAFT CORPORATION PART NUMBER 753 516 REVISED AUGUST 15 1998 1A1...

Page 2: ...Member General Aviation Manufacturers Association Published by Technical Publications The New Piper Aircraft Inc 2926 Piper Drive Vero Beach Florida 32960 US A 1A2...

Page 3: ...t current by revisions distributed periodically These revisions will supersede all previous revisions and will be complete Aerofiche card replacements and shall supersede Aerofiche cards of the same n...

Page 4: ...a single serial number list No serial numbers duplicated PARTS This manual generally does not contain hardware callouts for installation Hardware callouts are only indicated where a special applicati...

Page 5: ...TION STRUCTURE SURFACE CONTROLS LANDING GEAR AND BRAKE SYSTEM AEROFICHE CARD NO 2 POWER PLANT PA 24 180 POWER PLANT PA 24 250 AND PA 24 260 POWER PLANT PA 24 400 POWER PLANT PA 24 260 Turbo FUEL SYSTE...

Page 6: ...al Nos 24 1 to 24 2298 incl 1C9 Brake Reservoir PA 24 180 250 Serial Nos 24 2299 and up PA 24 260 and PA 24 400 1C9 Fuel Strainer and Drain PA 24 180 250 Serial Nos 24 2299 and up and PA 24 260 1C11 F...

Page 7: ...n Correct Method of Installing Rod End Bearings Aileron Control Installation Installation of Bellcrank Checking Tool Aileron Adjusting Points Flap Control Installation Determining Neutral Rudder Posit...

Page 8: ...24 250 Serial Nos 24 1 to 24 3295 Grid No 1J6 137 1J10 1J12 1317 1718 1119 1724 1K1 1K2 1K3 1K5 1K6 1K8 1K9 1K10 1K12 Brake Assembly Cleveland PA 24 180 and PA 24 250 Serial Nos 24 3296 up PA 24 260 a...

Page 9: ...A 9 Engine Installation PA 24 260 Serial Nos 24 4783 and 24 4804 and up 7A 10 Carburetor TA 11 Schematic Diagram of RSA Fuel Injector System PA 24 250 PA 24 260 TA 12 Idle and Mixture Adjustment Fuel...

Page 10: ...Fuel Air Bleed Nozzle 2H10 Contact Points 2H12 Rotor Holding Tool Installed 2H14 Timing Kit Installed 2H14 Aligning Timing Marks Single Contact Assembly Magneto 2H15 Forming Leads in Breaker Compartme...

Page 11: ...me 9 19 Checking Stator 9 20 Checking Diodes 9 21 Brush Holder Assembly 9 22 Exploded View of Heat Sink Assembly 9 23 Checking Alternator Qutput 9 24 Volt Ohmmeter Test 9 25 Jumper Connection 9 26 Reg...

Page 12: ...24 250 Serial Nos 24 1252 to 24 2298 Cabin Heater Defroster and Fresh Air System PA 24 180 and PA 24 250 Serial Nos 24 2299 and up Cabin Heater Defroster and Fresh Air System PA 24 260 Serial Nos 24 4...

Page 13: ...mits Nose Gear Wear Limits Propeller Specifications PA 24 180 Timing Data Troubleshooting Chart Engine PA 24 180 Propeller Specifications PA 24 250 260 Timing Data Troubleshooting Chart Engine PA 24 2...

Page 14: ...REFACE LIST OF TABLES continued Subject Airspeed Tubes And Indicator Magnetic Compass Manifold Pressure Indicator Tachometer Engine Oil Pressure Gauge Fuel Pressure Gauge Turn and Bank Indicator Oil T...

Page 15: ...1A16 I 11 Fuselage e 1A16 1 12 Landing Gear o iiuiiiii it e iitn ettt tAl6 1 13 Hydraulic Systems ottt 1A16 1 14 Engine And Propellers i it tA16 1 15 Fuel System ot i i e e i et 1A17 1 16 Flight Contr...

Page 16: ...lists the leading particulars and principal dimensions 1 7 Description 1 8 The Piper PA 24 Comanche is a four place optional 5th and 6th seats are available in the PA 24 260 Serial Nos 24 4300 and up...

Page 17: ...4 400 system consists of four fuel cells one engine driven pump and one electric auxiliary pump 1 16 Flight Controls The flight controls are conventional equipment consisting of a control wheel which...

Page 18: ...THIS PAGE INTENTIONALLY LEFT BLANK 1A18...

Page 19: ...THIS PAGE INTENTIONALLY LEFT BLANK 1A19...

Page 20: ...eee it et et e 1C3 2 19 External Power Receptacle 1C3 2 20 Operation of External Power Receptacle t 1C3 2 21 L1 11T PR RS 1C4 2 22 Cleaning Engine Compartment 1C4 2 23 Cleaning Landing Gear 1C4 2 24...

Page 21: ...e 1C15 2 62 Cleaning Operstions v ittt intnn it 1C15 2 63 Removal of Oxygen Cylinderand Regualtor 1C16 2 64 Installation of Oxygen Cylinderand Regulator 1C16 2 68 Removalof FilleValve 0 1C17 2 66 Inst...

Page 22: ...tment door on the upper right side of the firewall engine side on the fuselage adjacent to the left side of the tail skid 2 5 Access and Inspection Provisions The access and inspection provisions for...

Page 23: ...t be followed explicitly CAUTION Do not overtorque fittings NOTE When flared fittings are being installed ascertain that the male threads are properly lubricated Torque fittings in accordance with Tab...

Page 24: ...ek P8 24 250 24 1 TO 24 2298 INCL 298 174 PA 24 100 24 TO 24 2298 INCL 296 172 PA 26 1860 8 250 24 2299 AND UP 298 5 16 CENTERDINE OF THRUS FIGURE 2 1 THREE VIEW OF COMANCHE PA 24 180 and PA 24 250 HA...

Page 25: ...CHE SERYICE MANUAL OIMEDRAL 3 e T F STATIC GROUNDL INE CENTERLINE OF THRUST FIGURE 2 2 THREE VIEW OF COMANCHE PA 24 260 Serial Nos 24 4000 to 24 4248 24 4248 to 24 4299 HANDLING AND SERVICING REVISED...

Page 26: ...ERVICE MANUAL p N0 T 751 4 0 L L I _ _ 8 8 e i s m OBEDRAL o B 33 178 FIGURE 2 1 THREE VIEW OF COMANCHE PA 24 260 Serial Nos 244247 24 4300 to 24 4782 24 4784 to 24 4803 incl HANDLING AND SERVICING RE...

Page 27: ...PIPER COMANCHE SERYICE MANUAL 282 r ISO N mF I_nJ __l L 0 0 90 03 B STA 63 5 o o 94 a ni _ l ig 308 2 FIGURE 24 THREE VIEW OF COMANCHE PA 24 400 HANDLING AND SERVICING REVISED 4 3 78 1B3...

Page 28: ...PIPER COMANCHE SERVICE MANUAL 38 8 2 FIGURE 2 5 THREE VIEW OF COMANCHE PA 24 260 Serial Nos 24 4783 24 4804 and up HANDLING AND SERVICING REVISED 4 3 78 1B4...

Page 29: ...EL i ii OR FLLER TaR STHGER FUSELAGE AFT SECTION ACCESS PLATE LUGGAGE COMPARTICERT BACK PLATE 186U s ACCESS PLATE WA FUEL AR ABKAURY FOEL TARK ACTESS PLATE ACCESS PATE srosca 15EALL 1581 AN FUEL TARE...

Page 30: ...Starter Deico Remy 12 voit Prestolite 12 volt Generator Delco Remy 12 Voit 35 Amp 12 Volt 50 Amp Generator voltage regulator Delco Remy 12 volt 35 amp 12 volt 50 amp Fuel pump drive 0 360 A1A 0 360 A1...

Page 31: ...lternator Delco Remy 12 volt 70 amp Alternator voltage regulator Delco Remy Alternator overvoliage relay Delco Remy Alternator Prestolite 12 volt 70 amp Alternator voltage regulator Prestolite Alterna...

Page 32: ...r Delco Remy 12 volit Prestolite 12 volt Generator Delco Remy 12 volt 35 amp 12 volt 50 amp Generator voltage regulator Delco Remy 12 volt 35 amp 12 volt 50 amp Alternator Delco Remy 12 volt 70 amp Al...

Page 33: ...mp Alternator Delco Remy 12 volt 70 amp Alternator voltage regulator Delco Remy Alternator overvoltage relay Delco Remy Alternator Prestolite 12 volt 70 amp Alternator voltage regulator Prestolite Alt...

Page 34: ...501 Cleveland 30 70 Serial Nos 24 1 to 24 3306 Cleveland 40 58 Serial Nos 24 3307 and up Cleveland 3000 250 Serial Nos 24 1 to 24 3295 Cleveland 30 41 Serial Nos 24 3296 and up 6 00 x 6 4 ply rating 6...

Page 35: ...00 to 24 47 2 incl PA 24 260 Serial Nos 24 2400 to 24 4782 24 4784 to 24 4803 inclusive Two 30 U S gal 2US gal Two 15US gal Electrically operated Combination air and oil MIL H 5606 2 75 in 9 ft 8 in 6...

Page 36: ...se wheel travel Wheel Nose Wheel Main Brake type Tire Nose Tires Main Tire pressure Nose Tire pressure Main OVERALL Gross weight Gross landing weight P A 24 400 Two 30 US gal 3 US gal Two IS5US gal El...

Page 37: ...or HC A2VK 1 Blade model McCauley D 2101 78KM 4 D 2286 80MM 6 Hartzell 8447A 12A VB433N 7 Diameter McCauley 74 in 74 in Hartzell 72 in 77 in Diameter min McCauley 72in 73 in Hartzell 70 5 in 76 in Bl...

Page 38: ...l Constant speed two blades HC A2VK t VB433N 7 77 in 76 in 14 5 0 15 31 to 33 Hartzell A210305 B 4 2 PA 24 260 Carburetor Induction and Fuel Injected Serial Nos 24 4000 to 24 4782 24 4784 to 24 4803 i...

Page 39: ...Woodward Hartzell PA 24 260 Fuel Injected Serial Nos 24 4783 24 4804 and up Hartzell Constant speed two blades HC E2YR 1B 8467 7R 77 in 75 in 15 32 to 34 Hartzell F 4 4A CONTROL SURFACE TRAVELS CONTR...

Page 40: ...AY PN N LEFT REAR BOX OR FILLER 1y ACTESS PLATE Z y S g FUSELAGE AFT SECTION ACCESS PLATE GEAR TRANSMISSION ACCESS PAMEL J 1SEAL J ABXIIARY RUEL TAMK ACEESS PLATE ISEAL NAB FUEL TARK ACCESS PLATE DNER...

Page 41: ...CCESS PLATE FUSELAGE FLOOR ACCESS PARELS AR FUEL TAMR Q ACCESS PATE isea AN FREL T FILLER MATE ISEAL ALERON SELLCAML NSPECTION PLATE SERL WINE ACCESS NOLE COVER PLATE ENGRIE LEFT ACCESS PANEL LEFT FOR...

Page 42: ...lowingis theformulato be used Refer to Figure 2 8a T Torque desired at the part A Basic lever length from center of wrench shank to center of handle or stamped on wrench or listed for that model wrenc...

Page 43: ...h periodically to assure accuracy recheck frequently Ascertain that the bolt and nut threads are clean and dry unless otherwise specified by the manu facturer If the bolt or nut is specified to be lub...

Page 44: ...4 AN 525 NK525 MS 27039 NUTS Steel Tension Steei Shear AN 310 AN 320 AN 316 AN 364 AN 363 NAS 1022 AN 365 MS 17826 NAS 1021 MS 20364 MS 17825 MS 21045 MS 20365 MS 20500 NAS 679 Nut bolt Torgue Limits...

Page 45: ...365 NAS 1021 MS 20500 NAS 679 NAS 679 NAS 1291 Nut bolt Torque Limits Torque Limits Torque Limits Torque Limits Torque Limits Torque Limits size in ibs in lbs in lbs in lbs in ibs in lbs Min Max Min M...

Page 46: ...10061 OR AND 10078 AND 10061 HOSE ASSEMBLIES MINIMUM MAXIMUM MINIMUM MAXIMUM MINIMUM MAXIMUM 18 3116 0 100 70 100 1 4 40 65 135 150 70 120 5 16 60 80 180 200 85 180 8 75 125 270 300 100 250 112 150 25...

Page 47: ...cks evenly undl all three wheels ciear the floor 2 12 Weighing Refer to Figure 2 10 2 Block the main gear oleo struts in there fully extended position and the nose gear at 2 50 inches extension Inflat...

Page 48: ...and the nose gear to 2 50 inches NOTE All dres should be az normal infladon pressure Deflate the nose wheel tire until the level position is obuained d To laterally level the aircraft piace a level a...

Page 49: ...lly FIQURE 2 11 LEVELING AIRPLANE PA 24 180 250 260 Serial Nos 24 4000 to 24 4246 24 4248 10 24 4299 and PA 24 400 Al29 AR Longitudinally Laterally FIGURE 2 12 LEVELING AIRPLANE PA 24 280 Serial Nos 2...

Page 50: ...the landing gear forks and securing the rudder e Install pitot tube cover if possible 2 15 Parking When parking the airplane insure that it is sufficiendy protected against adverse weather conditions...

Page 51: ...following checks 3 Taxi forward a few feer and apply brakes to determine their effectiveness b Taxi with propeller set in low pitch high RPM setxing c While taxiing make slight turns to ascertain the...

Page 52: ...Landing Gear Before cleaning the landing gear place a plastic cover or similar material over the wheel and brake assembly 2 Place a2 pan under the gear to catch waste b Spray or brush the gear area wi...

Page 53: ...plastic can be removed by using jeweler s rouge to rub out the scratch Smooth both sides and apply wax f Toimprove visibility through windshield and windows during flight through rain a rain repellent...

Page 54: ...static load Empty weight of airplane plus full fuel and oil If the strut has less tube exposure than prescribed determine whether it needs air or oil by rocking the airplane If the oleo strut oscillat...

Page 55: ...these are as follows First Method 1 Remove the valve core from the filler plug ar the cop of the nose gear strut housing or at the top inboard side of the main gear housing Allow the filler plug to r...

Page 56: ...ty weight plus full fuel and oil Refer to Figure 2 13 Rock the airplane several times to ascertain that the gear settles back to the correct strut position If a strut pump is not available the airplan...

Page 57: ...ed in Table 11 1 When checking tire pressure examine the tire for wear cuts bruises and slippage 2 42 Power Plant 2 43 Servicing Power Plant Regularly check the engine compartment for oil and fuel lea...

Page 58: ...induction airfilter being serviced 2 48 Fusel Systems 249 Filling Fuel Tanks Observe all required precautions for handling gasoline Fill the fuel tanks with fuel specified in Table I l On the PA 24 18...

Page 59: ...ow of the fuel is observed by means of the transparent tube and should cease as observed through tube when the handle is released On the PA 24 400 Figure 2 17 the fuel is drained from the cockpit by l...

Page 60: ...abin bulkhead Low pressure oxygen is routed from the cylinder and regulator to the outlets and masks whenever the control knob is pulled to the ON position Each outlet has a spring loaded valve which...

Page 61: ...ylinder pressure is below 50 psi thesystem should be purged as described in Paragraph 2 71 b To obtain the correct filling pressure for the oxygen cvlinder at various ambient temperatures a chart has...

Page 62: ...ms use to approximately 600 psi then return for filling When the pressure gauge on the recharge unit or in the airplane reaches 1800 psi close the pressure regulator valve on the recharge unit Disconn...

Page 63: ...examination 2 61 Maintenance a Check that all lines have sufficient clearance between all adjacent structures and are secured in place Also check the cylinder to be sure it is securely mounted b Chec...

Page 64: ...F for a suitable period 2 63 Removal of Oxygen Cylinder snd Regulator The cylinder and regulator are located on the left side of the fuselage aft of the baggage area at station 157 2 Remove the acces...

Page 65: ...system Remove the access panel on the resr wall of the baggage comparunenc Disconnect the firting from the back of che pressure gauge Loosen and remave the retainer nut and clamp holding the gauge in...

Page 66: ...Remove the microphone from the mask b Remove the sponge rubber discs from the mask turrnets Do not use soap to clean sponge rubber discs as this would deteriorae the rubber and give off unpleasant odo...

Page 67: ...table container with a minimum capacity of 8 quarts a Remove the oil drain access plate from bottom of the engine cowl b Remove oil drain plug from bottom of the engine sump It is recommended the engi...

Page 68: ...mp Refer to Figure 2 18 When cermin that the screen is properly seated tighten the plug If the plug seems tight this will indicate that the screen is not properly seated and must be disassembled and t...

Page 69: ...an the pressure and suction screens each 25 hours of engine operation or every four months whichever comes first b Ashless Dispersant Detergent Oil 1 With the exception of turbocharged engines new or...

Page 70: ...il sparingly never more than enough to coat the bearing surfaces b Since the cables are sufficiently coated by the manufacturer additional protection for the prevention of corrosion is unnecessary c S...

Page 71: ...44 11 112 29 64 453 45 11 509 15 32 469 47 11 906 31 64 484 48 12 303 500 50 12 700 Revised 8 15 98 4ths Bths 16thJ 32ndJ 64ths PIIAOC ES P AOCZEJ va 33 64 516 52 13 097 17 32 531 53 13 494 35 64 547...

Page 72: ...WATER MUD ETC FLAPS WITH NYLON ROLLERS WILL NOT REQUIRE LUBRICATION ON EITHER FLAP TRACKS OR ROLLERS FOR LUBRICATION OF EARLY MODELS PA 24 180 AND PA 24 250 FLAP HINGES REFER TO FIGURE 2 25 FUEL SELEC...

Page 73: ...HRS 10 GOVERNOR THROTTLE AND MIXTURE CABLE ENDS MIL L 7870 100 HRS 11 ENGINE OIL SUMP PRESSURE SCREEN FILTRATION ONLY 6 MIL L 6082 6 25HRS 11 ENGINE OIL SUMP FULL FLOW FILTRATION 6 MIL L 6082 6 50 HRS...

Page 74: ...THROTTLE AND MIXTURE CABLE ENDS MIL L 7870 100 HRS 11 ENGINE OIL SUMP PRESSURE SCREEN FILTRATION ONLY 6 MIL L 6082 6 25 HRS 11 ENGINE OIL SUMP FULL FLOW FILTRATION 6 MIL L 6082 6 50 HRS 12 LANDING GE...

Page 75: ...L L 6082 6 50 HRS 8 PILOT AND PASSENGERS SEAT TRACKS MIL L 7870 100 HRS 98 AIRFILTER 1 CLEAN 50 HRS 10 GOVERNOR THROTTLE AND MIXTURE CABLE ENDS MIL L 7870 100 HRS 11 LANDING GEAR RETRACTION MECHANISM...

Page 76: ...MIL L 7870 100 HRS CONTROL WHEEL CHAIN VERTICAL AND HORIZONTAL MIL L 7870 500 HRS STABILATOR CONTROL TUBE BEARING AND SQUARE TUBE MOUNTING BEARING MIL L 7870 100 HRS SKETCH A Figure 2 23 Control Colu...

Page 77: ...CK PULLEYS AND RELEASE ARM PIVOT L BEARING MIL L 7870 100 HRS 3 FLAP STOP MIL G 23827 100 HRS 4 PIVOT POINT AND ROD END MIL L 7870 100 HRS PA 24 260 PA 24 180 PA 24 260 PA 24 400 SKETCH B 3198 Figure...

Page 78: ...100 HRS PA 24 180 PA 24 250 PA 24 260 PA 24 400 SKETCH C 3198 1 OVERHEAD TRIM PULLEY LUBRICATION MAY BE EXTENDED TO 250 HOURS WHEN DUSTY CONDITIONS ARE AT A MINIMUM UNDER NO CIRCUMSTANCES SHOULD THE...

Page 79: ...RINGS MIL L 7870 100 HRS SHIMMY DAMPENER ROD END BEARING AND MOUNT Mit L 7870 100 HRS UPPER AND LOWER TORQUE LINK CONNECTING BOLT MIL L 7870 100 HRS WHEEL BEARINGS 2 MIL G 3545 100 HRS UPPER AND LOWER...

Page 80: ...ND BEARING AND MOUNT MIL L 7870 100 HRS 5 UPPER AND LOWER TORQUE LINK CONNECTING BOLT MIL L 7870 100 HRS 6 WHEEL BEARING 2 MIL G 3545 100 HRS 7 UPPER AND LOWER TORQUE LINK BUSHING MIL G 23827 100 HRS...

Page 81: ...D MIL L 7870 100 HRS 4 STABILATOR TRIM SCREW 2 MIL G 3545 100 HRS 5 STABILATOR TRIM MECHANISM MIL L 7870 100 HRS 6 RUDDER TRIM UNIVERSAL JOINT MIL L 7870 100 HRS 7 RUDDER BUNGEE CONTROL ROD RUDDER TRI...

Page 82: ...ACTUATING MECHANISM BRAKE i _ CYLINDER ENDS MIL L 7870 100 HRS RUDDER PEDAL TORQUE TUBES AND BLOCK BEARINGS MIL L 7870 100 HRS CONTROL CABLES ENDS AND RUDDER PEDALS MIL L 7870 100 HRS ALL MODELS EXCEP...

Page 83: ...QUENCY 1 AILERON PUSH PULL ROD END BEARINGS CONTROL CABLE ATTACHMENT POINTS MIL L 7870 100 HRS 2 BELLCRANK PIVOT BEARINGS MIL L 7870 100 HRS SKETCH G Figure 2 30 Bellcrank Lubrication PA 24 180 250 26...

Page 84: ...NG LEFT MIL G 23827 100 HRS i N L 2 9 5 PA 24 260 PA 24 180 PA 24 250 PA 24 400 SKETCH H NOTE REMOVE ONE OF THE TWO GREASE FITTINGS FOR EACH BLADE APPLY GREASE THROUGH FITTING UNTIL FRESH GREASE APPEA...

Page 85: ...D BEARINGS TORQUE LINK CONNECTING BOLT MIL L 7870 100 HRS 5 SIDE BRACE END BEARING AND PIVOT BEARING MIL G 23827 100 HRS 8 SIDE BRACE MOUNT BEARING MIL G 23827 100 HRS 7 UPPER AND LOWER TORQUE LINK BU...

Page 86: ...ittt e 1Dt5 3 4 Inspection REQUIFEMENLS oo vt in ittt 1D15 35 Preflight Check ovi i 1D15 3 6 Overlimits INSPeCtion vvv vttt e 1Dt6 3 7 Special InSpections ID16 3 8 Inspection of Exhaust System ciiiiii...

Page 87: ...lumn in each group lists the inspection or procedure to be performed The second column is divided into four columns indicating the required inspection intervals of 50 hours 100 hours 500 hours and 100...

Page 88: ...ion could often be accomplished during the nearest scheduled inspection Specific definitive inspection on engines based strictly upon engine operating time d Those inspections not completely covered i...

Page 89: ...for replacement of the muffler If any component is inaccessible for a thorough visual inspection accomplish one of the following a Accomplish a submerged pressure check of muffler and exhaust stack at...

Page 90: ...TABS TABS INNER BAFFLE QUTER HOUSING ALL WELDS AS INDICATED 8Y ARROWS PA 24 180 ALL WELDS AS INDICATED 8Y ARROWS PA 24 250 ALL WELDS AS INDICATED 2Y ARROWS INNER BAFFL QUTER HOUSING FIGURE 3 2 EXHAUST...

Page 91: ...NOS 244000 TO 244782 244784 TO 244803 INCL INNER BAFFLE OUTER HOUSING BRIDGE PLATE ALL WELDS AS INDICATED BY ARROWS 78 HOUSING PA 24 260 SERIAL NOS 24 4783 24 4804 AND UP FIGURE 3 3 EXHAUST SYSTEM IN...

Page 92: ...ks and corrosion 0 o 0 9 Rotate blades and check for tightness in hub pilot tube 0O O O 10 Remove propeller remove sludge from propeller and crankshaft o O 11 Overhaul prop el lcr As reqd by Hartzell...

Page 93: ...per lubrication chart and Table I v1 o o O 1 0 16 CIEAN ENBINE ot senss s e ses e o o 0 17 Inspect condition of spark plugs Clean and adjust gap as required 0 015 to 0 018 or 0 018 to 0 022 per lates...

Page 94: ...st stacks connections and gaskets Refer to Section IIF Replace gaskets as required ccccovuveeneenineereniniennns Inspect muffler heat exchanger and baffles Refer to Section III Inspect breather tube f...

Page 95: ...visually inspect COMPIESSOT WHELL ooveveecneveresseeeeecroess oo o o o 8 Inspect the compressor wheel for nicks cracks or broken blades o o 0 9 Inspect for excess bearing drag or wheel rubbing agains...

Page 96: ...emove inspection panels and plates See Note 22 o o oO 2 Check fluid in brake reservoir Fill as required o O O 0 3 Inspect battery box and cables at least every 30 days Clean and flush box as required...

Page 97: ...3 Reinstall inspection panels and plates oooovvvvevvvooooooo o o0 F WING GROUP 1 Remove inspection plates and fairings oevvovovosoeososooso o 0 0 2 Inspect wing aileron and flap surfaces for damage an...

Page 98: ...t for proper fluid level as required Inspect nose gear steering control Inspect wheels for alignment Put airplane on jacks Inspect tires for cuts uneven or excessive wear and slippage Remove wheels cl...

Page 99: ...of brakes and parking brake Check operation of vacuum gauge Check gyros for noise and roughness 10 Check cabin heat operation 11 Check magneto switch OPEration ccovenicrnivinirerrinssesssnessseseseen...

Page 100: ...engine compartment after 8 years 1000 hours time in service or at engine overhaul whichever comes first Pressure check fluid hoses in the fuselage and wing areas to system pressures after 10 years ti...

Page 101: ...ply with Airworthiness Directive No 82 19 01 For PA 24 260 S N s 24 3642 and 24 4000 through 24 5028 only refer to Piper Vendor Service Publication No 69 Examine cables for broken strands by wiping th...

Page 102: ...viiiirinnriiiiainieernnenes 1E1l 4 21 INS1AIIAIION ttt ettt e ittt e e e e e e e 1E13 4 22 Installation Of Wing Assembly oviiiiiniiiiiiii i 1E13 4 23 Installation Of Wing oviiiii i et 1E13 4 24 Instal...

Page 103: ...alancing e SECTION IV STRUCTURE Aerofiche Grid No Introduction This section covers the removal and installation procedures for the main structural components for checking and balancing the control sur...

Page 104: ...cab The stabilazor and vertical fin have two channel main spars running fuil length The stabilator is attached to the fuselage by a torque tube supported by bearing blocks 4 3 Removal 4 4 Removal Of W...

Page 105: ...lts d Pull the flap straight off the wing 4 9 Removal Of Flap PA 24 250 Electricslly Operoted And PA 24 260 a Remove the access plate to the flap bellcrank located on the rear under side of the wing a...

Page 106: ...II c Drain the brake lines and reservoir Refer to Draining Brake System Section IL d Remove the ront and rear seats e Set the aircraft on jacks Refer to Jacking Section I1 f Remove front floorboatd a...

Page 107: ...stabilator to the torque tube Slide the stabilator from the torque tube poee 4 16 Removal Of Stabilator Trim Tab a Disconnect the stabilator trim control rod b Remove the stabilator trim hinge pin Str...

Page 108: ...OLT ANG60 816 WASHER MS20365 624C NUT UPPER SPAR STRAP A174 AN5 7A BOLT ANDBO 518 WASHER 2 REQ MS20365 524C NUT SPAR SUPPORT INST Figure 4 2 Wing Attachment Fittings STRUCTURES O ANDRU 013 WASHER ANS...

Page 109: ...olts use standard rorque values k From fuselage assembiy connect airspeed fuel and brake lines and main gear control cables to wing panels Connect aileron control cables m Connect aileron balance cabi...

Page 110: ...alled on the flap b Position the flap in place lubricate the flap rollers and tracks Refer to Lubrication Chart Section I and install the lower roller assemblies Refer to figure 4 3 Swing the flap rea...

Page 111: ...wing panel 4 32 nstallation Of Empennage 4 33 Installation Of Fin a Position the fin on the top of the fuselage aft section and align the holes in the froat attachment plate with the holes in the fro...

Page 112: ...to the fuselage rear bulkhead c Artach the tail cone fairing 4 37 Instailation Of Fuselage Components 4 38 Replacement Of Windshield The windshield on the PA 24 consists of two sections which may be r...

Page 113: ...nce the door is properly aligned with the door frame the procedure of trimming and fitting the door can be started Using a small pair of metal shears and a file trim the door edges until there is an a...

Page 114: ...ade by bending arm 6 and or strap 7 it is important to note here that button 8 must be free of excess friction in the rubber grommet e Now install rod 9 while the locking mechanism is in locked positi...

Page 115: ...g Install the latch tube clevis end to the lower latch assembly Adjust the clevis to allow the inside handle to operate when the outside handle is moved in and out through its three positions The out...

Page 116: ...r Aircraft Distributors NOTE Very carefully follow resin and catalyst mixing instructions furnished with repair kit 4 45 Fiberglas Touch Up And Surface Repairs a Remove wax oil and dirt from around th...

Page 117: ...oximately a 30 degree angle and rough sand the hole and the area around it using 80 grit dry paper Feather back for about two inches all around the hole This roughens the surface for strong bond with...

Page 118: ...o any crevices p Cover with cellophane and squeegee smooth Allow o cure completely before removing ceilophane Let cure and resand q Brush or spray a coat of caralyzed resin to seal patch Sand patch fi...

Page 119: ...w parts 4 49 Repair of Rudder Precautions must be taken when performing any maintenance and or repairs to the rudder Repairs must be made in a manner that maintains the original configuration strength...

Page 120: ...PLATE P N 11884 AS REQ SALANCE PLATE P N 31262 AS REQ As3e 1 BALANCE ARM 2 i 2 STABILATOR CONTROL CABLES 2 EXTENSION SPRING CABLE 4 PLATE PIN 23179 00 5 BALANCE ARM WEIGHT PA 24 400 8 MASTER CHECK WEI...

Page 121: ...r it should not be so tight that the control rod cannot casily be moved sideways or endwise on the bearing Whenever any portion of the horizontal il surface has been repaired and or repainted refer tw...

Page 122: ...e weight with the check weight tab facing aft Refer to Figure 4 7a 4 Balance the stabilator by installing balance weight plates P N 23179 until it is completels balanced The stabilator should not move...

Page 123: ...TE The PA 24 400 rudder is properly balanced as long as head weightis installed No further balancing is required Should repainting be required it will be necessary to remove all old paint prior to app...

Page 124: ...shers per bolt along with longer boles to accepe the added washers is allowed The washers must be spaced evenly on both balance weights Refer to Figure 4 7 h Any rudder which does not balance within t...

Page 125: ...NGE g 7 MAXIMUM OF TWO WASHERS PER BOLT KNIFE EDGE SUPPORTS TORQUE T SEE NOTE RUDOER HINGE CENTER ACCURATELY CALIBRATED Vi SCALE BALANCE STAND NOTE Refer to Torque Tabie 11 il in Section It STRUCTURES...

Page 126: ...24 T3 0040 29 2024 13 0032 12 5052 0 0040 30 2024 73 0032 13 2024 T3 0028 31 2024 73 0025 14 5052 0 0040 32 2024 T3 0025 15 3003 0 0051 3 2024 T3 0025 16 2024 0 Q 025 34 2024 13 Q025 17 202473 0032 35...

Page 127: ...KNESS NO MATERIAL THICKNESS 1 THERMO PLASTIC 0 093 7 2024 13 0040 FIBER GLASS B 2024 73 0040 2 2024 13 0025 9 2024 713 0015 3 2024 13 0020 10 2024 13 0025 4 202473 0 025 1 2024 T3 0016 2024 T3 0 032 1...

Page 128: ...26 26 2024 13 0025 9 20243 0025 27 2024 T3 0032 10 2024 13 0020 28 202473 0032 202413 0040 29 2024 13 0032 12 50520 0040 0 2024 13 0032 13 202413 0025 31 2024 13 0025 12 5052 0 0040 32 2024 73 0025 15...

Page 129: ...9 NO MATERIAL THICKNESS NO MATERIAL THICKNESS 1 FIBER GLASS 8 2024 13 0040 2 2024 13 0025 8 2024 73 0016 3 2024 T3 0020 10 2024 13 0025 a 2024 13 0032 1 2024 13 0016 5 2024 13 0020 12 2024 13 0016 6 2...

Page 130: ...2024 T3 0025 9 2024 13 0025 27 2024 T3 0032 10 2024 0 0020 28 2024 T3 0032 11 2024 13 0 040 29 2024 T3 0032 12 2024 13 0032 30 2024 T3 0032 13 FIBER GLASS 31 2024 T3 0025 14 FIBER GLASS 32 2024 13 002...

Page 131: ...2024 T3 NO MATERIAL THICKNESS NO MATERIAL THICKNESS 1 FIBER GLASS 8 2024 73 0040 2 2024 13 0025 9 202413 0016 3 202473 0020 10 2024 13 0025 a 2024 13 0032 1 2024 3 0016 5 202473 0020 12 2024 T3 0016...

Page 132: ...PIPER COMANCHE SERYICE MANUAL MT M m I 8 g il m 2 mm m 38 z T PIGURE 4 14 TYPICAL ACCESS HOLES 8 18 12 STRUCTURE ISSUED 1F12...

Page 133: ...iaennniaarannenn 5 21 Removal of Flap Controls PA 24 400 coivviiiiinnan 5 22 Installation of Flap Controls PA 24 400 covvvvieinnnnnn 5 23 Rigging and Adjustment of Flap Controls PA 24 400 5 24 RuUdde...

Page 134: ...bilator torque tube When the control wheei is moved forward or aft the cables move the balance arm up and down turning the torque tube and stabilator The rudder is controlled by rudder pedals installe...

Page 135: ...MENTS PA 24 180 PA 24 250 PA 24 250 PA 24 260 PA 24 4Q0 MANUALLY QPERATED ELECTRICALLY OPERATED E ELECTRICALLY OPERATED FLAP TRAVEL 5 7o21 13 21 PA 24 180 SERIAL NO S 24 i TO 24 102 INC PA 24 180 SERI...

Page 136: ...ANEL A210 Control Wheel o g Travel B4 i A C A B c D E MODEL NEUTRAL FORWARD AFT LEFT RIGHT PA 24 400 7 875 5 873 14 875 88 25 88 25 PA 24 260 7 87 5 878 14 87s 88 258 88 25 PA 24 250 8 378 5 0628 14...

Page 137: ...ls 1 and 10 with tube 2 proceed as follows 1 Mark the roller assembly B cable artachment ficting 20 and collars fore 21 and aft 22 in reference to their positions around the control wheel tube 2 Cut t...

Page 138: ...hers and rotate the eccentric bushing 37 to maintain 0 003 of an inch clearance between one roller 15 and the tube 3 with the opposite roller in contact with the tube Adjust clearance of the other set...

Page 139: ...ON ADJUSTMENT SCREW CONTROL WHEEL LEFT SQUARE TUBE SHAFT BRACKET LEFT CHAIN LEFT CHAIN RIGHT BRACKET RIGHT PULLEY CONTROL WHEEL RIGHT CONTROL CABLE STABILATOR BOLT NUT ASSEMBLY SLIDE BLOCK CONTROL TUB...

Page 140: ...SQUARE TUBE SHAFT BRACKET LEFT BRACKET RIGHT BOLT NUT ASSEMBLY ROLLER ASSEMBLY ROLLER SPROCKET RIGHT SPROCKET LEFT BUSHING STOP STOP PIN NUT AND WASHER SPROCKET AXLE ECCENTRIC BUSHING WASHER STUD PN2...

Page 141: ...TABILATOR BOLT NUT ASSEMBLY ROLLER ASSEMBLY ROLLER SAFETY WIRE CAP BOLT SEAL WASHER BEARING FITTING CONTROL WHEEL SHAFT COLLAR CONTROL WHEEL SHAFT FRONT COLLAR CONTROL WHEEL SHAFT REAR SUIDE BLOCK SQU...

Page 142: ...the end of the control mbe over the square tube 3 unuil the control tube contacts the roller bearing housing 3 If the control wheel tube fits easily over the guide blocks 23 align the cable artachment...

Page 143: ...MAGE RERE WRONG oAMAGE HERE IMPROPER TOOL RESULTING IN LOCKED BALL A SPECIAL WRENCH MAY BE REQUIRED WITH A LONG THROAT ONLY CORRECT METHOD FIGURE 5 1a CORRECT METHOD OF INSTALLING ROD END BEARINGS SUR...

Page 144: ...ter pin cable guard from the cable pulley by reaching through the access hole at wing staton 115 5 NOTE The aft end of each bellcrank and the turnbuckie assembly of the primary cable are painted red t...

Page 145: ...ng at station 113 5 position the cable around the upper pulley of the cluster and if the primary conwol cable is installed install the cotter pin cable guard S If an autopilot roll servo is part of th...

Page 146: ...LE RIGHT 7 STRAP PITTING 8 BOLT ASSEMBLY 9 LOCKNUT 10 ADJUSTMENT BOLT 11 STOP BLOCK 12 END BEARING CONTROL ROD 13 CONTROL ROD 14 PIVOT BOLT ASSEMBLY 15 ROD CABLE GUARD 16 SWAQGED BALL FITTING 17 TURNB...

Page 147: ...E MANUAL A e A SKETCHB NOTE BE SURE THE CABLE IS ROUTED BETWEEN THE CABLE GUARD AND THE PULLEY y VIEW A A 15 ROD CABLE GUARD A260 SKETCH C Figure 5 2 Aileron Control Installation cont 1G3 SURFACE CONT...

Page 148: ...inder the pulley cluster at station 50 0 and up to the vertical sprocket chain CAUTION When stringing the cables on the front pulley cluster just aft of fire wall be sure to thread cable in the pulle...

Page 149: ...left stops with the rudder controls held in neurral position 12 Manually Operaced Flsps 5 13 Removal Of Manually Operaeed Flap Controls Refer to Figure 5 5 2 The flap lever assembly 36 may be removed...

Page 150: ...CABLE LEFT 3 PULLEY 4 SPRING 5 CONTROL CABLE RIGHT 6 BELLCRANK RIGHT 17 TURNBUCKLE 36 LEVER ASSEMBLY 37 RATCHET ASSEMBLY 38 SUPPORT BRACKET 39 PULLEY BRACKET 40 CABLE 41 PAWL MANUAL SKETCH A Figure 5...

Page 151: ...ARM ASSEMBLY ELECTRICAL ELECTRICAL PA 24 400 PA 24 250 AND PA 24 260 TURNBUCKLE o2z BRAKE DISC PIN WASHER COTTER PIN TRANSMISSION BRAKE SOLENOID TRANSMISSION SCREW BOLT BUSHING NUT ADAPTER FLAP RETURN...

Page 152: ...E GUARD PIN 26 CABLE CLEVIS 27 FLAP RETURN CABLE 28 COTTERPIN 29 BUSHING 30 LOCKNUT 3t ROD FORK END 32 LINK FLAP CONTROL ROD 33 CONTROL ROD 3 43 SKETCH B 35 ROD END BEARING 43 RETURN SPRING 44 STEP LO...

Page 153: ...located inside the fuselage On the PA 24 180 PA 24 250 PA 24 260 Serial Nos 24 4000 to 24 4246 24 4248 10 24 4299 disconnect tension spring 42 with left tumnbuckle e The control cable located in the...

Page 154: ...t through the wing into the fuselage Enter through the wheel well and instail the cable pulley e The control cable that is within the fuselage should be connected to the wing cable and flap ansmission...

Page 155: ...rt spring 42 through the hole in the inboard cable end terminal Position the flaps in the 15 extended location Then adjust rod 12 so the hand on the flap position indicator on the instrument panel is...

Page 156: ...nstall the flap acmuating mechanism assembly connect the control arms 14 and 15 to the upper spar support tube and insert che pivot boit Tighten the bolt to a saug fit with no binding of the arms Inst...

Page 157: ...iness The maximum distance aliowed below cthe neutral position is three turns on the adjustment screw The screw should be readjusted after rigging is completed Place the flaps in full up position and...

Page 158: ...f Rudder Controls Refer to Figure 5 8 2 To install the rudder pedal controls place the pedal assembly imto position from the left inside of the fuselage Slide the tube into the left bearing block inst...

Page 159: ...damage to the rudder 6 Apply masking tape at 90 to airplane centerline between stabilator halves immediately beneath rod inserted on rudder Ontape mark the airplane centerline stabilator tab actuator...

Page 160: ...NOB TUBE SUPPORT BLOCK BRACKET UNIVERSAL JOINT COVER PLACARD NOSE GEAR STEERING ARM ACTUATOR SCREW TRIM BUNGEE TUBE TRIM BUNGEE CupP SAFETY WIRE SPRING CONTROL ROD LOCKNUT END BEARING FITTING SWAGGED...

Page 161: ...URE THE CABLE IS ROUTED BETWEEN THE CABLE QGUARD AND THE 19 21 22 23 24 ROD CABLE GUARD TURNBUCKLES STEERING ROD PEDAL BOLTS BEARING BLOCKS A281 SKETCH D Figure 5 8 Rudder and Rudder Trim Control cont...

Page 162: ...and connect contro rod 1o trim bellcrank 7 From the pilot s seat only depress each rudder pedal completely and check for full deflection of the rudder to each side R Should the pointer not intersect...

Page 163: ...o ailow no up or down binding of the bungee rube on the trim screw Do not exceed over seven washers 5 32 Sabilamr Controls 33 Removal Of Stabilator Controls Refer to Figure 5 10 2 To remove the stabil...

Page 164: ...INTENTIONALLY LEFT BLANK 1G20...

Page 165: ...E BALANCE WEIGHT BALANCE ARM SPRING END BEARING CONTROL ROD BELLCRANK TRIM TA8 ACTUATOR ROD STOP TRIM SCREW INDICATOR WIRE TRIM ADJUSTMENT BOLT AND LOCKNUT BEARING BLOCKS HORN ASSEMBLY COUNTERBALANCE...

Page 166: ...R 7 BOLT ASSEMBLY 22 MOUNTING BRACKET UPPER 8 TUBE CABLE GUIDE 23 INDICATOR WIRE TRIM 9 ROD CABLE GUARD 24 MOUNTING BRACKET 10 HOUSING TRIM DRUM 25 HANDLE 11 SCREW TRIM 28 CRANK SUPPORT 13 PIN ASSEMBL...

Page 167: ...PPER INDICATOR WIRE TRIM MOUNTING BRACKET HANDLE CRANK SUPPORT STEM CRANK HANDLE ROLL PIN BALANCE WEIGHT BALANCE ARM SPRING CABLE END STRAPS END BEARING CONTROL ROD BELLCRANK TRIM TAB N ACTUATOR ROD N...

Page 168: ...ERVICE MANUAL NOTE BE SURE THE CABLE IS ROUTED BETWEEN THE CABLE GUARD AND THE PULLEY FWD VIEW A A SKETCH B 9 ROD CABLE GUARD Figure 5 10 Stabilator and Stabilator Trim Contro cont SURFACE CONTRO REVI...

Page 169: ...installed referring to paragraph 5 38 and the stabilator surfaces referring to paragraph 4 3 of Section V Before connecting any control cable check for proper balance of the stabilator Refer to Secti...

Page 170: ...der side of the control column to the control wheel Refer to Table V 1 for appropriate dimensions and cable tensions to obtain the stabilator neutral position NOTE Stabilator should hit stabilator sto...

Page 171: ...at the cabie on the drum and pulleys Again draw the free end of the cabie to approximately the required cable tension refer to Table V I swage the sleeve to the cable and reset the cable tension Cut o...

Page 172: ...lso check minimum number of wraps left on the drum Minimum allowable is one and one quarter 1 25 turns 5 40 Wrapping Stabilator Trim Drum Refer to Figure 5 10 Sketch D or G a To wrap the trim drum asc...

Page 173: ...olumn hori zontal chain im properly adjusted Pullevs binding or rub bing Cables not in place on pulleys Cables crossed or routed incorrectly Lubricate system Re fer to Lubrication Chart Section 11 Adj...

Page 174: ...n bellcrank stops Adjust in accordance not adjusted with Paragraph properly 3 11 Correct aileron travel Incorrect rigging of Rig in accordance wich cannot be obtained aileron cables Paragraph 5 11 by...

Page 175: ...rn switch on Replace selector switch Replace relay Check ground connee tion Check ground connec uon Replace moror solate cause and re pair Flaps fail to extend or retract Flap so lenoid does not ac tu...

Page 176: ...Chart Section 1 Check for defective parts and replace if necessary or consult latest Piper Service Letter No 595 Replace transmission Check and repair elec trical connections Clean and lubricate if ap...

Page 177: ...d open Check ground connec ton Mechanical linkage be Check and repair tween walking beam and transmitter broken or disconnected Transmirter inoperacive Replace Flap indicator shows flaps down when the...

Page 178: ...ce flap recraction PA 24 250 up to Serial Letter No 39 and 24 3444 inclusive install spring No 83302 54 Flap actuating svstem The limit switches are Resert limit switches fails to shut off when out of...

Page 179: ...ent System not lubricated properly Rudder pedal rorque tube bearing blocks in need of lubri caton Cable tension too high Pulleys binding or rub bing Cabies not in place on pulleys Cables crossed or ro...

Page 180: ...pedals not Rudder cables incor Rig in accordance with neurral when rudder rectly rigged Paragraph 5 27 is streamlined Incorrect rudder Rudder bellerank stop Rig in accordance with travel incorrectly...

Page 181: ...ullevs binding or rub bing Cables not in place on puileys Cables crossed or routed incorrectlv Lubricate system Refer to Lubrication Chare Section I1 Adjust cable tension per Table V I Replace binding...

Page 182: ...stem Re moves with excessive properly fer to Lubrication resistance Chare Section 1 Cable tension too high Adjust in accordance with Table V 1 Pulleys binding or rub Replace binding pullevs bing Provi...

Page 183: ...dicate correct properly adjusted with Paragraph 5 39 trim position Trim indicator wire Replace wire broken Trim indicator fails Trim indicator wire Replace wire to indicate any broken movement Broken...

Page 184: ...PIPER COMANCHE SERVICE MANUAL N 453 21 633 AILERON BELLCRANK TOOL Figure 5 13 Special Fabricated Tools Sheet 1 of 3 CE CONTROLS Revised 8 15 98 1H16...

Page 185: ...ABILATOR LEVELING TOOL 1 a el 12 PA 24 180 250 260 Figure 5 13 Special Fabricated Tools Sheet 2 of 3 P N 24475 00 A833 f 18 53 Wil L l N 1 2 R l s L 172 R _ v STABILATOR LEVELING TOOL L_ PA 24 400 l s...

Page 186: ...INTENTIONALLY LEFT BLANK 1H18...

Page 187: ...f Nose Landing Gear Door c ccvirveenurnnnnn 6 22 Nose Gear Door Assembly ovvunttiei it ittt et 6 23 Removal Of Nose Landing Gear Door Assembly 6 24 Cleaning Inspection And Repair Of Nose Landing Gear...

Page 188: ...Landing Gear Warning Switch 1K3 6 63 Adjustment Of Landing Gear Warning Switch v nn K4 6 64 Landing Gear Warning Indicator ooiuunie e 1KS 6 65 Removal Of Landing Gear Warning Indicator 1K5 6 66 Insta...

Page 189: ...e Valve Scott 1K24 6 97 Assembly Of Parking Brake Valve SCOt vuiinnrrrseeeernnreernnnnnnnnn 1K24 6 98 Disassembly Of Parking Brake Valve Hoof coviiinnininnnnnn 1K24 6 99 Cleaning Inspection And Repair...

Page 190: ...sound In the cockpit located berween the pilot seats under the floor panel is an extension handle used to manually extend the landing gear while in flight should it become necessary Also it may be use...

Page 191: ...washer 30 and snap ring 31 h To remove the orifice tube 21 from the oleo housing remove the locknut 1 and washer 2 from the top of the housing Draw the tube with O ring 20 and back up washer 19 from t...

Page 192: ...LiNk 16 BOLT ASSEMBLY 17 LOWER TOROUE LiNK BOLT 19 FORX assEmeLY 19 8ACK UP WASNER 20 Q RiNe 21 amiricr TusK 2 ORIFICE PLATE 23 SHAF RING 24 RETAINER Pins PPER SCARING amaceR 27 LOWER staningG 28 oUT...

Page 193: ...pacer 26 and upper bearing 25 Align the lock pin hole of the upper bearing with the pin holes in the piston tube and install pins 24 g Lubricate the inner wall of the housing 3 and tube 12 Carefully i...

Page 194: ...shimmy dampener 13 by removing each cotter pin nut washer and bolt that connects the dampener to the oleo cylinder and housing f Release and remove the snap ring 19 at the top of the housing 10 and p...

Page 195: ...wall of the piston tube 35 insert che plug into the top of the tube and push it to the fork end Align the boit holes of the fork 17 tube and plug and install bolr CT 15 with washers 51 and nut 30 If...

Page 196: ...torque links do not restrict travel in the compressed position The weight of the gear wheel and fork should allow the strut to extend p Service the oleo strut with fluid and air Refer to Oleo Struts...

Page 197: ...IRE CAP BOLT AIR VALVE STEERING BUSHING ASSEMBLY OLEO STRUT HOUSING BOLT ASSEMBLY MOUNTING BRACKET ASSEMBLY SHIMMY DAMPENER PISTON TUBE BOLT ASSEMBLY BOLT ASSEMBLY FORK ASSEMBLY Figure 6 2 Nose Gear O...

Page 198: ...RING PISTON TUBE PLUG 6 0 RING PLUG PISTON TUBE 27 WIPER STRIP 0 RING ORIFICE TUBE 45 WASHER RING ORIFICE TUBE PA 24 400 45 SNAP RING ORIFICE PLATE 0 NUT SNAP RING 51 WASHER PIN BEARING RETAINING BEAR...

Page 199: ...19 SNAP RING 28 STEERING ARM 20 BUSHING UPPER e 32 NUT ORIFICE TueE 30 COTTER PN 31 BUSHING TRUNNION 23 PIN LOCK I 32 BUSHING LOWER e o 33 OLEO CYLINDER Figure 6 2 Nose Gear Oleo Strut Assembly cont P...

Page 200: ...on or both drag links The shimmy dampener requires no service other than routine inspection In case of damage or malfunction the dampener should be replaced rather than repaired d Repair 1o the landi...

Page 201: ...r per paragraph 6 16 Install the bottom cowl and zir intake hoses h Connect and adjust the gear door per paragraph 6 17 or paragraph 6 22 6 15 Adjustment Of Nose Gear Drag Links Refer to Figure 6 3 2...

Page 202: ...T STEERING ROD LEFT LANDING GEAR MOUNT UPPER DRAG LINK RIGHT SPACER WASHER BOLT ASSEMBLY SPACER WASHER BOLT ASSEMBLY SHIMS TANG PUSH PULL ROD BOLT COUNTER SUNK CLEVIS DRAG LINK UPPER DRAG LINK LEFT DO...

Page 203: ...G LINK LEFT 29 DOWN LIMIT SWITCH LATE 30 CROSS BRACE DRAG LINK 32 PIVOT BOLT DRAG LINK 33 DOWN LOCK SPRINGS 34 LOWER DRAG LINK LEFT 35 LOWER DRAG LINK RIGHT 43 DOWN LIMIT SWITCH EARLY 44 REINFORCEMENT...

Page 204: ...ks and strut housing adjusted for proper clearance of the lower drag link attachment fittings and the attaching bolt is a slip fit secure the bolt with washer nut and cotter pin 2 Extend and retract t...

Page 205: ...b to the fuselage one half inch to the right from center of the tail skid d Using the plumb bobs as a guide snap a chalk line extending several feet beyond each bob e Stand in front of the nose landin...

Page 206: ...ore and aft The center line of the rudder pedals is 13 degrees aft of the vertical position refer to Figure 6 5 with the airplane level Place 2 bubble protractor against the pedal steering tube to che...

Page 207: ...er to Figure 6 7 i With the nose landing gear extended disconnect the retraction rods 6 at the acruator plate 4 by removing the locknuts and washers from cthe ball joints 5 b Remove the screws or hing...

Page 208: ...equate thread engagement for safety and tightness of jam nuts 6 27 Main Landing Gear 6 28 Disassembly Of Main Gear Oleo Refer to Figure 6 8 The main gear oleo assembly may be removed and disassembled...

Page 209: ...plate for hole restriction 6 Fork tube for corrosion scratches nicks dents and misalignment 7 Air vaive general condition Repair of the oleo is limited to smoothing out minor scratches nicks and dent...

Page 210: ...27 slide the washer 28 into position and secure the assembly with snap ring 29 j Ascertain that the bushings are installed in the upper and lower torque links 5 and 2 and then install links NOTE Asce...

Page 211: ...bolt 9 holding the bungee arm 10 to the rear strut support fitting 11 Cut and remove safety wire 13 Slide studs 14 from rear strut arm 7 Slide the bungee arm tube out of the rear support fitting free...

Page 212: ...WER SPACER WASHER BOLT ASSEMBLY TORQUE LINK UPPER BOLT ASSEMBLY HOUSING OLEO STRUT PISTON TUBE BOLT ASSEMBLY BOLT ASSEMBLY AXLE NUT FORK ASSEMBLY SERIAL NOS 24 1 TO 24 845 INCL C248 Figure 6 8 Main Ge...

Page 213: ...PIN RETAINING 0 RING ORIFICE TUBE 24 BEARING LOWER PISTON TUBE RING ORIFICE TUBE PA 24 400 25 O RING ORIFICE PLATE 26 0 RING SNAP RING 27 WIPER STRIP ORIFICE TUBE 28 WASHER 0 RING PISTON TUBE PLUG 29...

Page 214: ...gear is limited o reconditioning of parts such as replacing bearings and bushings inspecting parts for wear smoothing out minor nicks and scratches and repainting of areas where paint has chipped or p...

Page 215: ...68 00 1 2 20 NF 3 20768 01 1 2 20 NF 3 24911 00 1 2 20 N 4675 4550 4675 4550 4675 4550 F3 22577 00 5 8 18 NF 3 25046 00 5 8 18 NF 3 5889 5764 5889 5764 Step 2 Step 3 THREAD RING GAUGE METHOD Revised 8...

Page 216: ...in excess of the tolerances given in Figure 6 8c it must be replaced b Rod End Bearings 1 This check requires the use of a NO GO thread plug gauge refer to table included in Figure 6 8b for the specif...

Page 217: ...th bolt washers and out f Attach the upper drag link to the support bracket with clevis bolt washer nut and corter pin and the lower link to the strut housing with boit washers at cach side of bearing...

Page 218: ...CHMENT BOLT 26 PIVOT BOLT 10 BUNGEE ARM 27 LOWER DRAG LINK 11 STRUT SUPPORT FITTING REAR 28 SAFETY SWITCH LATE MODEL 12 SHIMS 29 DOOR RETRACTION ROD 13 SAFETY WIRE 30 UPPER TORQUE LINK 14 STUD 31 SHIM...

Page 219: ...CH LATE MODEL 26 PIVOT BOLT 27 LOWER DRAG LINK 28 SAFETY SWITCH LATE MODEL 30 UPPER TORQUE LINK 38 SWITCH ACTUATOR ROD 39 SAFETY SWITCH EARLY MODEL 40 JAM NUT SKETCH A 41 ACTUATOR ARM 42 DOWN LOCK SWI...

Page 220: ...FITTING REAR a s 12 SHIMS 15 STRUT HOUSING 17 SHIMS 18 STRUT SUPPORT FITTING FRONT 43 SUPPORT BEARING REAR o 44 SHIM 45 SNAP RINGS 46 BARREL NUT SKETCH C 47 BARREL NUT 48 SUPPORT BEARING FRONT 49 ATT...

Page 221: ...djustment to any of the three gears in which the conrrol tubes rod were disconnected with aircraft on jacks the transmission disconnected ascermain that all three gear drag links go over cenrer and lo...

Page 222: ...ain Landing Gear 2 Place a straight edge no less than twelve feet long across the front of both main landing gear wheels Butt the straight edge against the tire at the hub level of the landing gear wh...

Page 223: ...nt still exists separate the torque links and add another spacer to the torque links Limit the number of spacers installed to allow for installation of the cortter pin in the bolt 6 36 Removal Of Main...

Page 224: ...e only high enough to take weight off the gear Release the air pressure from the suut by depressing the valve core pin undl the pressure has diminished d Using snap ring pliers disengage the snap ring...

Page 225: ...e carpet back off the front center access panel by removing carpet attaching screws 3 Remove front center access panel by removing attaching screws On airplanes with Serial Nos 24 4783 24 4804 and up...

Page 226: ...SSEMELY suNBEE COMD LEFT MAIN GEAR STRUT ASSEMBLY RETRACTION TRANSMISSION ASSEMBLY EMERGENCY EXTENSION HANDLE 1 METRACTION TOROUE TUBE PUSH PULL ROD SEAL PusH PULL ROD s DRAG LINK CLEVIS NOSE GEAR DAA...

Page 227: ...s until they are 010 to 015 below the surface of the rubber This grinding operation may be repeated until the coupling reaches a minimum diameter of 1 inch and then should be replaced h Adjust the mot...

Page 228: ...G 20 MOTOR BRAKE ASSEMBLY LATE TRANSMISSION PA 24 180 AND PA 24 260 21 BRAKE SOLENOID 7 TRANSMISSION COVER SERIAL NOS 24 1 TO 24 3587 22 BRAKE SUPPORT ARM 8 TRANSMISSION GASKET 16 TRANSMISSION RETRACT...

Page 229: ...arm 9 by removing the cotter pin washer and pin g Disconnect the forward end of the rod at the left drag link located in the nose gear wheel well by removing nut washer and bolt Retract the gear enoug...

Page 230: ...ing procedure a With the rod end bearing removed from the aft end of the push pull rod place the rod in the nose wheel well and slide it through the seal assembly b Attach the rod end bearing to the a...

Page 231: ...on transmission and nose gear down lock springs Following adjustment to any of the three gears in which the control tubes rod T were disconnected with aircraft on jacks che transmission disconnected a...

Page 232: ...h toward or away from the striker plate When the landing gear is down and locked the limit switch should have broken contact The nose gear down limit switch located at the lefr drag link is adjusted b...

Page 233: ...ELEASE TUBE 20 TORQUE TUBE 21 EXTENSION LEVER EMERGENCY PA 24 280 C only 22 TRAMSMESSION RETRALT SPRING PA 24 180 and PA 24 280 SERAL NOS 24 1 24 3887 23 TRANSMISSION RETRACT SPRING PA 24 180 snd PA 2...

Page 234: ...fittings secure the rod end firting jam nuts and safety all pins g Safery wire all castle nuts as shown in Figure 6 14 Sketch A Airgraft which have lock washers should be safety wired in accordance wi...

Page 235: ...d Shims are supplied in sizes of 016 0 32 0 64 and 125 The clevis torque must be from 13 to 40 foot pounds properly aligned with the counter sunk hole side of the 064 and 125shims againstthe radius of...

Page 236: ...gear and check to insure that both main gear assemblies enter the whee well approximately the same distance and that the nose gear enters far enough Refer to Figure 6 16 2 If the gear does not retrac...

Page 237: ...1J21 INTENTIONALLY LEFT BLANK...

Page 238: ...1J22 INTENTIONALLY LEFT BLANK...

Page 239: ...of the adapter is seated on the extension handle or on the torque tube socket 8 Open the gear motor circuit breaker to prevent moror from running during gear check h Partially retract landing gear usi...

Page 240: ...DEPENDING ON TYPE OF WRENCH ADAPTER P N 26348 00 x EXTENSION HANDLE EFFEcr LENGT ADAPTER 1215 RETRACTION TORQUE TUBE INCHgg MAIN GEAR PUSH PULL CABLEZS5 l NOSE GEAR PUSH PULL ROD Figure 6 19 Torque Wr...

Page 241: ...GRIP AREA OR HANDLE PIVOT POINT DEPENDING ON TYPE OF WRENCH l _ EFFECTIVE WRENCH LENGTH ADAPTER P N 26347 00 EFFECTIVE ADAPTER LENGTH 12 INCHES RETRACTION TORQUE TUBE Figure 6 20 Torque Wrench and Ad...

Page 242: ...s fully extended 4 To adjust the lock remove cotter pin 7 loosen jam nut 6 and turn lock arm 4 in the desired direction 5 1f one half turn is needed for correct adjustment remove bolt 10 attaching loc...

Page 243: ...ing gear warning micro switch located in the throttle quadrant by the following procedure 1 Remove the left trim cover from the throttle quadrant by removing attaching screws 2 Remove switch mounting...

Page 244: ...erial Nos 24 1 to 24 4782 incl 24 4784 0 244803 incl and PA 24 400 by the following procedure a With the barrery master switch on loosen the mounting screws or set screws on the micro switch mounring...

Page 245: ...the indicator plate and secure with set screw c Connect the landing gear cable to the indicator link arm and secure with set screw d Attach the assembly to the top of the instrument panel with screws...

Page 246: ...ay be disassembied by deflating the tire and removing the screws 8 securing the grease seal retainers 5 e Remove the retainers and bearing cones 4 f Remove the bolts 12 securing the wheel halves and s...

Page 247: ...ert a 1 875 inch diamerer tube into the fork and tap ourt the axle from the whee l assembly 3 lnsert a2 prying tool between the side of the fork assembly and wheel and apply enough pressure on the for...

Page 248: ...ilure Check internal diameter of felt grcase seals Replace the felt grease seals if surface is hard or gritty Check tire for cuts internal bruises and deterioration Check bearing cones and cups for we...

Page 249: ...s follows Refer to Figure 6 26 1 Slide the wheel on the axie 2 Tighten the axie nut to allow the wheel to turn freely yet not fit loose on the axle 3 Safety the axie nut and install dust cover g Insua...

Page 250: ...placement The bearing cup may be removed by tapping evenly from the inside of the wheel 6 75 Inspection Of Wheel Assembly Visually check all parts for cracks distortion defects and excess wear Check t...

Page 251: ...and washer and the retraction spring 19 and sleeve 18 from the cylinder housing e Slide the pressure plate 7 and lining off the anchor bolts 11 of the cylinder housing f The pistons 8 may be removed...

Page 252: ...retraction cylinder 9 onto the anchor bolts 11 of the cvlinder housing and install retraction sleeve 18 spring 19 washer 20 and adjusting nut 21 c Slide the cylinder housing assembly on the torque pl...

Page 253: ...Check the brake disc for grooves scratches or pits A single groove or isolated grooves up to 031 of an inch deep would not necessitate replacement but a grooving of the entire surface would reduce li...

Page 254: ...leveland brake No 30 23 perform three consecutive hard braking applications from 45 50 mph without allowing the brake discs to cool substantially between stops 6 84 Removal And Disassembly Of Wheel Br...

Page 255: ...solated groove up to 031 of an inch deep would not necessitare replacement but a grooving of the entire surface would reduce lining life and should be replaced f Lining can be removed by lifting it fr...

Page 256: ...nd Refer to Figure 6 31 Rivered Brake Disc 2 Remove eight rivers amtaching brake discs to inner wheel half by chiseling off heads inside drum and punching them out b Place wheel half assembly into boi...

Page 257: ...escribed below a Place a suitable conuiner at the brake reservoir to collect fluid overflow b Remove the rubber bieeder firting cap located on the botvom of the brake unit housing on the landing gear...

Page 258: ...G BRAKE VALVE 6 MASTER CYLINDER CONTROL CABLE 7 RETURN SPRING 8 9 o INSPECT CABLE 21077 00 FOR FRAYING MASTER CYLINDER LEFT WHEEL BRAKE LINE SKETCH A 10 RIGHT WHEEL BRAKE LINE FIGURE 6 33 BRAKE SYSTEM...

Page 259: ...2869 FLUID RESEAVOIR RIGHT PARKING BRAKE CONTROL CABLE LEFT PARXING BRAXE CONTROL CABLE RIGHT MASTER CYLINDER TORQUE TUBE RIGHT CONMECTING NOD RIGHT RUDDER PEDAL LEFT MASTER CYLINDER LEFT CONNECTING...

Page 260: ...its bracket by removing the artaching correr pin washer and pin 6 91 Disassembly Cleaning Inspection And Repsir Of Brake Master Cylinder Refer to Figure 6 35 2 Disassembie the master cylinder by remov...

Page 261: ...king brake cable through the bushing in the actuarting arm and secure with set screw Clamp the cable housing to the upper part of the cylinder assembly d Connect the brake fluid lines to the cylinder...

Page 262: ...1K22 INTENTIONALLY LEFT BLANK...

Page 263: ...3 4 3 cCar 7 3 11 maTOM 13 srmine 18 SPRING JAM NUT SNAP RiNg INNER ort Rimg RO ausHine ROLL PIN 10 9 wing 19 CYLINDER WOUSING FIGURE 6 35 BRAKE MASTER CYLINDER PA 24 180 and PA 24 250 Serial Nos 24 1...

Page 264: ...d remove rivet Slide the valve stem out of the vaive body Remove the spacer and O ring from the vaive body pne or 6 96 Clanml Inspection And Repair Of Parking Brake Valve Scott Clean all parts in a su...

Page 265: ...e Vaive 2 On airplanes with Serial Nos 24 1 to 24 2201 indl position pukmg brake valve on the aft side of the firewall near the left set of rudder pedals b Connect control cable to valve lever Secure...

Page 266: ...17 and valve 16 6 104 Cleaning Inspection And Repair Of Brake Cylinder Clean the cylinder parts with a suitable solvent and dry thoroughly Inspect the interior walls of the cylinder for scratches burr...

Page 267: ...m moD 19 FITTING 9 MYLON waSHER 20 0 Ring 10 13Tom 21 susKing 1 0 t ming 12 seming 12 seming 21 watngn 13 suswing 24 Wyt T4 SNAS mING 23 CAM AND ACTUATING ARMm 19 CYL NDER aZEEMELY 26 scmw ISSUED 8 18...

Page 268: ...rking brake cable through the bushing in the actuating arm and secure with set screw Clamp the cable housing to the upper part of the cylinder assembly d Connect the brake fluid lines to the cylinder...

Page 269: ...e Adjust microswitch Refer operate when throttle out of adjustment o Paragraph 6 63 is closed and landing gear is retracted Nose gear down limit switch Check wires and replace inoperacive limir switch...

Page 270: ...es Adjust limijt switches out of adjustment Gear indicaror lights Reset cirucit breaker circuit breaker open Transmission screw oper Bearing retainer sleeve Rig landing gear system so ates but release...

Page 271: ...PIPER COMANCHE SERVICE MANUAL 1n5 62 i e 3 FRONT les l FIGURE 38 FABRICATED PLUMB BOB TOOL LANDING GEAR AND BRAKE SYSTEM ISSUED 8 18 72 1L7...

Page 272: ...PIPER COMANCHE SERVICE MANUAL 11250 b 1878 118 nn FIGURE 6 39 FABRICATED NOSE WHEEL ALIGNMENT JIG 1L8 LANDING GEAR AND BRAKE SYSTE ISSUED 8 18 72...

Page 273: ...2 TYP 5 00 4 1 19 MATERIAL STEEL 4130 125 X 75 X 5 00 L J MATERIAL TUBE STEEL 4130 13 16 0 0 X 937 1 0 X 1 43 L NOTE AFTER FAERICATION OF ASSEMBLY HEAT TREAT TO 160000 180000 PSI TYPICAL INSTALLATION...

Page 274: ...1L10 INTENTIONALLY LEFT BLANK...

Page 275: ...OMANCHE SERVICE MANUAL DIAL INDICATOR CULINCM THE ROD END BEARING BETWEEN THE BOLT AND NUT FIGURE 8 41 INSPECTION OF ROD END BEARINGS INTENTIONALLY LEFT BLANK ADDED 6 25 76 LANDING GEAR AND BRAKE SYST...

Page 276: ...ragraph 6 32 and Figure 6 8a g Insull the downlock springs on the nose gear If only one spring i used obtain Piper Service Kic 761 082 for additional spring installation Refer to paragraph 6 14 for in...

Page 277: ...61 563 561 564 7 AN4 Boit 249 000 245 1 249 003 Shoulder 8 20737 8 Bushing 251 249 249 252 9 AN26 Bolt 373 1 371 370 373 10 14843 60 Bushing 373 375 435 433 373 376 432 435 11 24911 Link 4365 4385 436...

Page 278: ...PIPER COMANCHE SERVICE MANUAL cae7 A s 0 5 7 g o Q YATRANG o 5 14 Figure 6 42 Main Gear Wear Limits LANDING GEAR AND BRAKE SYSTEM REVISED 4 10 81 1L14...

Page 279: ...755 3745 3765 7 AN6 Bolt 374 000 370 374 003 7 ANG6 Boilt 374 000 370 374 003 8 14843 18 Bushing 3745 3755 3745 3765 8 14843 19 Bushing 3745 3755 3745 3765 9 20803 Bushing 374 376 374 376 10 AN178 Boi...

Page 280: ...PIPER COMANCHE SERVICE MANUAL FIGURE 843 NOSE GEAR WEAR LIMITS ss maee 1L16...

Page 281: ...ken wires do not exist Figure 27 1A shows a cable with broken wires that were not detected by wiping but were found during a visual inspection The damage became readily apparent Figure 27 1B when the...

Page 282: ...IRES WORN MORE TH AN 50 INDIVIDUAL OUTER WIRES WORN MORE THAN 40 50 NOTE BLENDING OF WORN AREAS INDIVIDUAL OUTER WIRES WORN LESS THAN 40 WORN AREAS INDIVIDUALLY DISTINGUISHABLE Figure 2 External Cable...

Page 283: ...and liquids can accumulate Note Check all exposed sections of cable for corrosion after a cleaning and or metal brightening operation has been accomplished in that area Cable Maintenance Frequent insp...

Page 284: ...lubrication smooth rotation freedom from flat spots dirt and paint spray Periodically rotate pulieys which turn through a small arc to provide a new bearing surface for the cable Maintain pulley alig...

Page 285: ...PIPER COMANCHE SERVICE MANUAL Added 8 15 98 THIS PAGE INTENTIONALLY BLANK 1L21 APPENDIX NO 1...

Page 286: ...PIPER COMANCHE SERVICE MANUAL APPENDIX NO 1 GRIDS 1L22 THRU 1L24 INTENTIONALLY BLANK 1L22 Added 8 15 98...

Page 287: ...PIPER AIRPLANE SERVICE MANUAL CARD 2 OF 3 COMANCHE PA 24 180 PA 24 250 PA 24 260 PA 24 260 TURBO PA 24 400 PIPER AIRCRAFT CORPORATION PART NUMBER 753 516 REVISED AUGUST 15 1998 2A1...

Page 288: ...GAMA Member General Aviation Manufacturers Association Published by sechnical Publications The New Piper Aircraft Inc 2926 Piper Drive Vero Beach Florida 32960 US A 2A2...

Page 289: ...ept current by revisions distributed periodically These revisions will supersede all previous revisions and will be complete Aerofiche card replacements and shall supersede Aerofiche cards of the same...

Page 290: ...a single serial number list No serial numbers duplicated PARTS This manual generally does not contain hardware callouts for installation Hardware callouts are only indicated where a special applicati...

Page 291: ...INSPECTION STRUCTURE SURFACE CONTROLS LANDING GEAR AND BRAKE SYSTEM AEROFICHE CARD NO 2 POWER PLANT PA 24 180 POWER PLANT PA 24 250 AND PA 24 260 POWER PLANT PA 24 400 POWER PLANT PA 24 260 Turbo FUE...

Page 292: ...peller Installation Hartzell PA 24 250 Propeller Installation Hartzell PA 24 260 Woodward Propeller Governor Adjustment Points Hartzell Propeller Governor Adjustment Points Engine Installation PA 24 2...

Page 293: ...RSA Fuel Injector System PA 24 260 Turbo Fuel Injector Fuel Air Bleed Nozzle Contact Points Rotor Holding Tool Instatled Timing Kit Installed Aligning Timing Marks Single Contact Assembly Magneto For...

Page 294: ...18 8 19 PREFACE LIST OF ILLUSTRATIONS continued Subject Bendix Plunger Fuel Pump Late Exploded View Bendix Rotary Fuel Pump Primer Pump Carburetor Induction System Fabricated Fuel Quantity Transmitter...

Page 295: ...ing Chart Engine PA 24 250 260 Propeller Specifications PA 24 400 Troubleshooting Chart Engine PA 24 400 Propeller Specifications PA 24 260 Turbo Troubleshooting Chart Mixture Control Indicator Troubl...

Page 296: ...Of Propeller Governor Woodwud 7 20 Adjustment Of Propeller Governor Hartzell Engine 7 22 Removal Of Engine 7 23 Installation Of Engine 7 24 Replacement Of Engine Shock Mounts Induction System Air Fil...

Page 297: ...cking Procedure S 7 46 Harness Assembly 7 47 Removal Of Harpess 7 48 Installation Of Harness Spark Plugs 7 50 Removal Of Spark Plugs 7 51 Inspection And Cleaning Of Spark Plug 7 52 Installation Of Spa...

Page 298: ...nd a dual contact magneto on the left to obtain the retard spark necessary for starting A starting vibrator magneto switches and starter switch complete the system In addition to the previously mentio...

Page 299: ...t Removing attaching screws from bottom cowl and remove by pulling down and forward 7 6 Cleaning Inspection And Repair Of Engine Cowi a b Clean cowling with a suitable cieaning solvent and wipe dry wi...

Page 300: ...art in relation to the other to facilitate installation 2 Remove the spinner 10 by removing the screws 11 that secure it to the spinner bulkhead 5 b Place a drip pan under the propeller to carch oil s...

Page 301: ...y turn freely on the hub pivot tube This can be done by rocking the biades back and forth through the slight freedom allowed by the pitch change mechanism If they appear tight and are properly lubrica...

Page 302: ...ropeller hub bore Make sure that the 0 ring is not twisted and is liberally coated with clean lubricating oil NOTE Some McCauley Model 2D36C14 propellers will be found in use with 2 counterbore in the...

Page 303: ...ngine flange g The spinner bulkhead may be removed from the starter ring gear 5 by removing nuts washers and bolts 6 oo 7 13 Cleaning Inspection And Repair The instructions for cleaning inspection and...

Page 304: ...be installed as failure o do so may result in failure of the mountng boits due to relative movement of the two flanges f Raise the propeller into position with the engine and slide the propeller onto...

Page 305: ...Low RPM McCauley 27 5 Hartzell 27 Propeller RPM Setting Engine Static High RPM 2700 RPM Max Engine Static Low RPM 1850 50 RPM Min Propeller Torque Limits Description Reguired Torque Dry Spinner Bulkh...

Page 306: ...17 Removal Of Governor a Life both engine cowl side panels by loosening the six fasteners b Disconnect control cable from governor control arm Remove control cable from cable bracket by removing nuts...

Page 307: ...m one serration counter clockwise increases the speed 100 rpm One revoludon of the hi pm fine adjustment screw in a clockwise direction decreases engine speed 25 rpm counter lockwise rotation increase...

Page 308: ...ease engine speed and a counter clockwise rotation to increase engine speed One revolution of the fine adjustment screw increases or decreases the propeller speed approximately 15 RPM d After setting...

Page 309: ...PIPER COMANCHE SERVICE MANUAL 7 21 Engine 7 22 Removal Of Engine INTENTIONALLY LEFT BLANK POWER PLANT ISSUED 8 13 72 2 A23...

Page 310: ...2 A24 INTENTIONALLY LEFT BLANK...

Page 311: ...P ENGINE MOUNT 20 EXHAUST TAIL PIPE 7 OlL PRESSURE SCREEN HOUSING 2 FUEL INLET LINE 8 YACUUM PUMP 22 CARBURETOR CONTROL CABLES 9 PROPELLER GOVERNOR 23 COTTER PIN 10 OIL FILLER 24 NUT s EXHAUST MUFFLER...

Page 312: ...INTENTIONALLY LEFT BLANK 2B2...

Page 313: ...r box and remove filter from the bortom cowl 7 27 Service Instructions Serial Nos 24 1 to 24 1476 This type of filter must be inspected daily for dirt accumulation and proper oiling the following proc...

Page 314: ...al Nos 241477 and up a Position the filter on the boctom cowl and secure with studs b Install air scoop on bortom cowl and secure with quarter turn fasteners 7 32 Carbureror 7 33 Carburetor Maintenanc...

Page 315: ...36 e Connect carbureror hear air duct to air box 7 36 Adjustment Of Carburetor Controls Refer to Figure 7 6a The throttie mixture and carburetor heat controls are adjusted so that when the throttie a...

Page 316: ...ortle mixture and carburetor hear controls in the cockpit full aft to ascertain thac the throttle arm contacts the idle screw and the mixrure control arm contacts its idle cut off stop and the carbure...

Page 317: ...ltitude upon idling adjustment 7 38 Ignition System 7 39 Magneto CAUTION Ascertain that the primary circuits of both magnetos are grounded before working on the engine 7 40 Inspection Of Magnetos At t...

Page 318: ...ody and flyweights k Check that the impulse coupling flyweight axle rivets are tight and there are no cracks in body I Check lead conduits for fraved or broken areas of braid due 1o excessive wear and...

Page 319: ...etermine E gap b To determine E gap find neutral position of the magneto drive by rotating drive coupling in a left hand direction until the red or white chamfered tooth on the distributor drive gear...

Page 320: ...ngine or magneto manufacturer A pointer may be formed as shown in Figure 7 12 NOTE A pointer can also be made bv wrapping a piece of soft wire tightly around the head of cam securing screw and bending...

Page 321: ...neurral position bend the pointer back to the 0 mark Using Dara Table VII I determine the degree of retard of the magnero being checked Normally the correct retard serxing will be stamped in bottom of...

Page 322: ...ated by a positive pressure inside the cylinder tending to lift the thumb cff the spark plug hole In this position both valves of No one cylinder are closed Turn the crankshart opposite to its normal...

Page 323: ...No one cylinder NOTE The crankshaft shouid not be rotated more than 10 degrees in direction opposite normal rotation from the 25 degree BTC as the pawi on the impulse coupling 21 magnetos will engage...

Page 324: ...ut must be at least 8 volts on 12 volt systems b If voltage is adequate listen for buzzing of vibrator during starting if no buzzing is heard either the vibrator is defective or the circuit from the o...

Page 325: ...must be replaced c Minor repair of the harness assembly such as replacement of contact springs spring retainer assemblies insulating sleeves or of one lead assembly can be accomplished with the harnes...

Page 326: ...y results in damage to the barrel insulator and connector If the lead cannot be removed easily in this manner the resisting contact between the neoprene collar and the barrel insulator will be broken...

Page 327: ...seized plug e Do not allow foreign objects to enter the spark plug hole 7 51 Inspection And Cleaning Of Spark Plug a Visually inspect each spark plug for the following non repairable defects I Severel...

Page 328: ...valve whose function is to permit pressure oil to by pass the oil cooler in case of an obstruction b Adjustable Oil Pressure Relief Valve The adjustable oil pressure relief valve enables the operator...

Page 329: ...t all are tight and there is no indication of cross threading See c below for oil line torque 2 Oil lines must have adequate clearance and be properly aligned 3 Oil line supports should be tight prope...

Page 330: ...sult in high oil consumption as the additives in some of these oils can retard the break in of the piston rings and cylinder walls 2 All new or newly overhauled turbocharged engines must be broken in...

Page 331: ...th two or three strokes of primer Open throctie and unioad engine Open throtte to one tenth of its range Clean and adjusz or replace spark plug or piugs Refer to Paragraph 7 51 for spark plug gap adju...

Page 332: ...etting Check spark piug gzp for alttude Dirty air filter Clean refer to Paragraph 7 25 Low power and uneven Maixture too rich indicaed Check primer Resdjusement of running engine by sluggish engine ca...

Page 333: ...nor of adjustment Faulry ignition Tighten all connections Check system Check ignition timing Rough running engine Cracked engine mounts Repair or repalce engine mount Unbalanced propeller Remove prope...

Page 334: ...mption and if found overhaul of engine is indicated Worn or broken piston Install new rings rings Incorrect installation of Install new rings piston rings External oil leakage Check engine carefully f...

Page 335: ...2 C1 INTENTIONALLY LEFT BLANK...

Page 336: ...r Lo e 2C11 7A 19 Cleaning inspection And Repair e 2C12 7A 20 Installation Of Propeller 2C12 7A 21 Adjustment Of Low Pitch Blade Anglc Stop 2C13 7A 22 Blade Track L 2C13 7A 23 Propeller Governor 2C15...

Page 337: ...tor For Service coovieviiniiininn 2D15 7A 60 Installation Of Fuel Injector ooiiiiiiiiiiien e naanaann 2Dis 7A 61 Adjustment Of Throttle And Mixture Controls Fuel Injector 2D16 7A 62 Adjustment Of Idle...

Page 338: ...components The S6LN 20 series magnetos incorporate a single breaker and an impuise coupling instailed on the left magneto The S6LN 200 series magneto system consists of a single contact magneto on the...

Page 339: ...isconnect the air bellows from air filter by loosening the quarter turn fasteners Disconnect all drains and holes attached to the bottom cowl Disconnect the two support tubes from the bottom cowl Disc...

Page 340: ...cracks loose rivets elongated ho ss and damaged or missing fasteners Repair all defects to prevent further damage Fiberglass repair procedures may be accomplished according to Fiberglass Repairs Secti...

Page 341: ...position of each part in relation to the other to facilitate installacion 2 Remove the spinner 10 by removing the screws 11 that secure it to the spinner bulkhead 5 b Place a drip pan under the propet...

Page 342: ...k blades to determine whether they turn freely on the hub pivot tube This can be done by rocking the counterweights or biades back and forth through the slight freedom allowed by the pitch change mech...

Page 343: ...h a counterbore in the hub instead of an 0 ring groove When installing these propellers always insert the 0 ring in the counterbore and push it to the bottom Never slide the 0 ring on the crankshaft p...

Page 344: ...installation Ascertain that the master switch and magneto switches are in the OFF position Remove the spinner 1 by removing the screws that secure it to the spinner bulkhead 4 Place a drip pan under t...

Page 345: ...hat shim 1 be installed as failure todo so may result in failure of the mounting boits due to relative movement of the two flanges f Raise the propeller into position with the engine and slide the pro...

Page 346: ...to paragraph 7A 13 7A 20 Installation Of Propeller PA 24 260 Refer to Figure 7TA 4 a Clean propeller and engine flanges b Install spinner bulkhead 10 on starter ring gear 11 and torque boits o specifi...

Page 347: ...M for each half turn or vice versa b After the low pitch stop has been adjusted for proper blade angle the governor should then be adjusted to obeain maximum rated engine RPM during take off and climb...

Page 348: ...RPM 15 High Pitch Low RPM 32 tc 34 Propelier RPM Setting Engine Stadc High RPM 24 250 2575 RPM Max 24 260 2700 RPM Max 1900 25 RPM Min Bulkhead to Propeller Hub Propeiler Mouncing Bolts Sruds Spinner...

Page 349: ...governor control per paragraph 7A 26 or 7A 27 7A 26 Adjustment Of Propeiler Governor Woodward PA 24 250 Refer to Figure 7A 5 a Scart the engine in accordance with the directions given in Owner s Opera...

Page 350: ...t screw in a clockwise direction to decrease engine speed and a counterclockwise rotation to increase engine speed One revoiution of the fine adjustment screw increases or decreases the propeller spee...

Page 351: ...tion c Remove engine cowling Refer 10 paragraph 7A 5 d Drain engine oil if desired e Remove propeller if desired Refer to paragraph 7A 12 or 7A 15 NOTE Where a question may arise as where to reconnect...

Page 352: ...inimum hoist to the lifting strap and relieve the tension on the engine mounts ae Check the engine for any attachments remaining to obstruct its remozal al Remore the cotter pin nut washer front rudde...

Page 353: ...er cable to fitting on engine accessory housing Connect magneto P leads to magnetos and safety Connect manifold pressure line to No 6 cyvlinder Connect primer line Connect cylinder head temperature wi...

Page 354: ...2 620 INTENTIONALLY LEFT BLANK...

Page 355: ...ER AUXILIARY FUEL PUMPS OIL COOLER ENGINE DRIVEN FUEL PUMP COTTER PIN NUT WASHERS SHOCK MOUNT SKETCH A o BOLT PROPELLER GOVERNOR STARTER RING GEAR LIFTING STRAP OIL FILLER SPARK PLUG OIL PRESSURE SCRE...

Page 356: ...INTENTIONALLY LEFT BLANK 2C22...

Page 357: ...nder Disconnect fuel pump drain hose from pump Disconnect fuel pump iniet and outler lines Remove oii cooler lines Disconnect exhaust gas temperature probe from No 6 cylinder exhaust stack Disconnect...

Page 358: ...2 24 INTENTIONALLY LEFT BLANK...

Page 359: ...NG INE SHOCK MOUNT REFER TO SKETCH A ENG INE MOUNT VACUUM LINE TACMOMETER CABLE MANIFOLD PRESSURE LINE DEFROSTER DUCT CABIN HEAT DUCT OIL COOLER AIR INTAKE HEATER EXHAUST STACKS EXMAUST MUFFLER IMJECT...

Page 360: ...INTENTIONALLY LEFT BLANK 2D2...

Page 361: ...nnect spark plug leads and clamp to prevent chafing 1 Connect throttle and mixture controls and adjust per paragraphs TA 52 or 7A 61 j Connect carburetor heat control if installed and adjusted per par...

Page 362: ...er from engine Disconnect exhaust gas temperature lead from No 6 cylinder exhaust stack Disconnect fuel pump inlet line at fuel pump Disconnect fuet pressure oil pressure and fuel flow lines Disconnec...

Page 363: ...traps to engine and engine mount 1 Connect cyvlinder head temperature No 5 cylinder and exhaust gas temperature No 6 cylinder leads and secure m Connect fuel pressure fuel flow and oil pressure lines...

Page 364: ...2 D6 INTENTIONALLY LEFT BLANK...

Page 365: ...TCK A 11 MANIFOLD PRESSURE LINE 12 ENGINE MOUNT 13 TACMOMETER CABLE 14 VACUUM LINE 13 AIR FILTER BOX 16 CABIN HEAT DUCTS 17 EXTERNAL POWER RECEPTACLE 18 AIR INTAKE HEATER 19 EXHAUST MUFFLER 20 EXMAUST...

Page 366: ...INTENTIONALLY LEFT BLANK 2D8...

Page 367: ...crease its efficiency Ilmmerse the filter in 2 light weight grade of oil for a period of five minures d After removal of the filter from the oil allow to drain thoroughly before installing in the airp...

Page 368: ...air filter and the injector unit is to provide a source of air should there be an air stoppage through the filter system The following should be checked during inspection a All door seals are tight a...

Page 369: ...e air box Disconnect fuel line from carbureror Remove carburetor from the engine sump by removing pal locknuts nuts and washers Cut safery wire and remove bolts attaching the air box to the carbureror...

Page 370: ...ad temperatures are normal b Check magnetos If the mag drop is normal proceed with idle adjustment Close the throttle 1o idle If the RPM changes appreciably after making the idle mixture adjustment du...

Page 371: ...tion Of Fuel Injector a There is verv little need for lubrication of the injector in the field berween regular overnauls However rhe cievis pins used in connection with the throttie and manual mixture...

Page 372: ...FLOW DIVIDER VALVE R MANUAL MIXTURE N ou THROTTLE VALVE CONTROL AND IDLE CUT OFF LEVER THROTTLE I LEVER IDLE SPEED it A ADJUSTMERT I i FUEL n Y INLET l CONSTANT HEAD oLe vaLve IDLE SPRING _ m LEVER CO...

Page 373: ...easily enter the air section of the injector through the impact tubes or the annular groove around the venturi For this reason a protective plate should be installed on the scoop mounting flange when...

Page 374: ...tating the cable end to obrain the 062 of an inch spring back of the cockpit control lever when the throttle or mixture control arm coneacts ifs stop d Reconnect the cable end to its control arm and s...

Page 375: ...ocedure Make additional adjustments as necessary Each time the adjustment is changed the engine should be run up to 2000 RPM to clear the engine before proceeding with the RPM check Make final adjustm...

Page 376: ...zzle CAUTION Start nozzles and line couplings by hand to prevent the possibility of cross threading e Install engine cowling 7A 67 Ignition System TA 68 Magneto CAUTION Ascertain that the primary circ...

Page 377: ...inch thick body should be checked with 1 8 inch drill Couplings with 974 inch thick body are checked with a2 No 18 dnill If drill fits between cam and flyweight the fit is too oose and coupling should...

Page 378: ...let plate from the magneto by removing the four attaching screws d Remove the two nuts and washers securing the magneto to the engine accessory housing e Pull the magneto from the engine 7A 71 Timing...

Page 379: ...n high point of the cam lobe Measure contact clearance it must be 018 inch 006 with the point opening set at E gap 4 If breaker points do not come within tolerances they siould be repiaced 7A 72 Adjus...

Page 380: ...d align the chamfered tooth of the distributor gesr with the white line of the distbutor block Ascertain that the main breaker pointws open ar this point and the pointer indicates 10 on the plate or E...

Page 381: ...mately 35 degrees BTC on the compression stroke of No one cvlinder Rotate the crankshaft in its normal directon of rotation uncil the 25 degrees mark on the back of the starter gear and the crankcase...

Page 382: ...il it is approximately 35 degrees BTC on compression stroke No one cylinder NOTE The crankshaft should noc be rotated more than 10 degrees in direction opposite normal rotauon from the 25 degree BTC a...

Page 383: ...g light Ascervain that the inspection plugs and breaker cover are installed and secure r Install harness plate and secure with screws s Connect P leads and safety t Connect starting vibrator lead to t...

Page 384: ...on coupling nuts Check compression spring to see if it is broken or distorted Inspect grommet for tears Check all mounting brackets and clamps to see that they are secure and not cracked b Using an oh...

Page 385: ...val Of Spark Plugs a Loosen the coupling nut on the harness lead and remove the terminal insulator from the spark piug barrel well NOTE When withdrawing the ignition cable lead connection from the plu...

Page 386: ...on dioxide by a Conical metal funnel adapter with a hole at cthe apex just large enough to accommodate the funnel of a CO2 bortle Refer to Figure 7A 23 When a seized spark plug cannot be removed by no...

Page 387: ...ench is cocked to one side when pressure is applied b Carefully insert the terminal insulator in the spark plug and tighten the coupling nut 7A 83 Lubrication System 7A 84 Oil Pressure Relief Valve Su...

Page 388: ...ws to 75 inch pounds d The suction screen is removed from the sump by removing the hex head plug at the lower aft part of the sump Clean and inspect the screen and gasket replace the gasket if over co...

Page 389: ...n high oil consumption as the additives in some of these oils can retard the break in of the piston rings and cylinder walls 2 All new or newly overhauled turbocharged engines must be broken in and op...

Page 390: ...orrect throttie setting Open throttle to one tenth of its range Defective spark plugs Clean and adjust or replace spark plug or plugs Refer to Paragraph 7A 81 for spark plug gap adjusanents Check with...

Page 391: ...en Mixture too rich indicated Check primer Readjustment running engine by sluggish engine operation red exhaust flame and black smoke Mixture too lean indicated by overheating or back firing Leaks in...

Page 392: ...d propeller Bent propeller blades Defective mounting Lead deposit on spark plug Malfunctioning engine Repair or replace engine mount Remove propeller and have it checked for balance Check propeller fo...

Page 393: ...verhaul Improper engine operation Check entire engine Excessive oil con Failing or failed bearing Check sump for metal par Worn or broken piston rings Incorrect installadon of piston rings External oi...

Page 394: ...rouble Cause Remedy Inaccurate pressure readings Cold weather High or low pressure readings due to exeremely cold weather are not neces sarily a malfuncrion Small and long oil lines will not cransfer...

Page 395: ...el cocks Prime by holding boost pump switch 4 to 10 seconds Place control in idle cut off Open throttie and unload engine by turning over with starter Open throtte to 1 8 of irs range Clean and adjust...

Page 396: ...too rich indicated by sluggish engine oper ation red exhaust flame at night Extreme cases indicated by black smoke from exhaust Mixrure 100 lean indicared by overheating or back firing Leaky nozzle Cl...

Page 397: ...ming and synchronization Defective spark plug Replace connectors on spark terminal connectors plug wire Incorrect valve clearance Adjust valve clearance by changing push rods Flow meter reads high Clo...

Page 398: ...ve and clean oil pressure relief valve See High Oil Temperarure in Trouble column Check valve Replace gage Check line for obstrucuon Clean sucton sainer Check sump for metal particles High oil tempera...

Page 399: ...of engine is indicared Install new rings nstal new rings Cold weather difficulties Cold oil Inaccurate pressure readings Overpriming Weak barrery Faulty ignicon switch Move aircraft into 2 heated ban...

Page 400: ...ilter 7B 20 Removal Of Air Filter 7B 21 Service Instructions 7B 22 Installation Of Air Filter 7B 23 Alternate Air Door Fuel Injector 7B 25 Fuel Injector Maintenance 7B 26 Lubrication Of Fuel Injector...

Page 401: ...ness 7B 45 Removal Of Harness 7B 46 Installation Of Harness 7B 47 Starting Vibrator e e Spark Plugs 7B 49 Removal Of Spark Plugs 7B 50 Inspection And Cleaning Of Spark Plug 7B 51 Installation Of Spark...

Page 402: ...and two low tension leads 2 starting vibrator and 2 combinacion ignition and starrer switch in addition to the previously mentioned components each engine is furnished with a 12 volt starter a 70 ampe...

Page 403: ...and separating it at the hinge m e oan oe 7B 5 Cleaning Inspection And Repair Of Engine Cowi 2 Clean cowling with a suitable cleaning solvent and wipe dry with a clean cloth b Inspect cowling for dent...

Page 404: ...acilitate installation a Remove the spinner 1 by removing the screws that secure it to the spinner bulkhead 7 b Place a drip pan under the propetler to catch oil spillage Cut the safety wire around th...

Page 405: ...afery f Check blades to determine whether they tumn freely on the hub pivot tube This can be done by rocking the blades back and forth through the slight freedom allowed by the pitch change mechanism...

Page 406: ...the mounting boits 4 in the propeiler hub and secure propeller 1o engine flange h Torgue boits to specification given in Table VIIB l and safery i Check blade wack per paragraph 7B 11 j Instail propel...

Page 407: ...w RPM 36 Propeller RPM Serting Engine Scaric High RPM 2650 RPM Max Engine Scatic Low RPM 1550 50 RPM Min Propeller Torque Limits Description Required Torque Dry Spinner Bulkhead 100 inch pounds Propel...

Page 408: ...If the governor is to be removed for a considerable length of time and another unit is not substituted it is advisable to cover the mounting pad to prevent damage caused by foreign matier 7B 14 Instal...

Page 409: ...ETCH A 10 OIL COOLER LEFT 11 ENGINE BRAEATHER 12 ENGINE MOUKT 13 LEFT MAGNETO 14 YACUUM PUMP 15 FUEL PUMP 16 RIGHT MAGNETO 17 TACHOMETER CABLE 18 FUEL PURGE VALYE 19 CABIN HEAT DUCT 20 DEFAOSTER DUCT...

Page 410: ...INTENTIONALLY LEFT BLANK 2F4...

Page 411: ...screw against the base projection to lock e Pull the PROPELLER cockpit control aft to the low RPM position f Observe engine speed Set to 1550 rpm either by threading the fitting at the governor contro...

Page 412: ...box and secure with clamp Inseall boctom cowl access plate and secure with fasteners anop 7B 23 Alternate Air Door The alternate air door locared in the induction system on the back side of the injec...

Page 413: ...n work into the throttie shaft bushings w 3 Removal Of Fuel Injector Remove the bottom cowling Refer to paragraph 784 Remove air intake hose from filter box Release the fasteners around the air box an...

Page 414: ...A TT R MANUAL MIXTURE Il d GELE LEVE CONTROL AND IDLE i CUT OFF LEVER FLOW DIVIDER VALVE 1 e IDLE VALVE CONSTANT HEAD IDLE SPRING LEVER CONSTANT EFFORT IDLE MIXTURE SPRING ADJUSTMENT AIR OIAPHRAGM FU...

Page 415: ...routine maintenance on the engine such as washing down the engine and air scoop servicing the air filter surplus oil on the clement or when injecting preservative into the engine prior to storing or s...

Page 416: ...e end c Adjust the linkage by rotating the cable end to obtain the 062 of an inch spring back of the cockpit control lever when the throttle or mixture control arm contacts its stop d Reconnect the ca...

Page 417: ...is linkage would cause erratic idling In all cases allowance should be made tor the cflect of weather conditions and field altitude upon idling adjustment 7B 33 Fuel Air Bleed Noazzles 7B 34 Removal O...

Page 418: ...o and inspect parts for moisture broken leads or other damage b Swing leads out of outiets in distributor block and remove two screws securing block in housing Lift the block from magneto c To properl...

Page 419: ...point of any cam lobe If the cam has been disturbed or if it is not known that cam has been moved time magneto using the following procedure NOTE Magnetos of late manufacture have a brown strip of gly...

Page 420: ...ure 7B 10 Reposition cam on rotor and install securing nur flush with end of rotar shaft Be sure notch on cam can be seen when looking in contact assembly end of magnero d Loosen drive shaft nut and i...

Page 421: ...to come to rest With rotor in this position align timing line of the Timing Pointer with full register position aming mark Recheck timing pointer position by again flicking Holding Tool Pointer shoui...

Page 422: ...iming Light or equivalent across main contact assembly Turn cam in direction of rotation slowly until timing light goes out contact points open While holding cam in this position tighten cam securing...

Page 423: ...ng Timing Magneto to Engine Check each unit for proper magneto rotation before placing either unit on the engine If the magneto is of the correct rotanon tum magneto rotor shaft in direction of rotati...

Page 424: ...ition d 3 NOTE The magnetic force in the S 700 series magnetos tends to act in the direction in which the rotor is turned during the timing operation This causes the backlash in the magneto drive gear...

Page 425: ...rings spring retainer assemblies insulacting sleeves or of one lead assembly can be accomplished with the harness assembiv mounted on the engine However should repair require replacement of more than...

Page 426: ...eto and the possibility of hazardous condirtions b Rortate engine crankshaft until number one cylinder is in its recard firing position Using the 11851 Timing Light check to see that both magneto cont...

Page 427: ...mness lead and remove the terminal insulator from the spark plug barrel well NOTE When withdrawing the ignition cable lead connecdon from the plug care must be taken to pull the lead straight out and...

Page 428: ...bon dioxide by a Conical metal funnel adaprer with a hole at the apex just large enough to accommodate the funnel of a CO2 borttle Refer to Figure 7B 15 When a seized spark plug cannot be removed by n...

Page 429: ...ark plugs Torque 360 to 420 inch pounds CAUTION Maice certain the deep socket is properly seated on the spark plug hexagon as damage to the plug could result if the wrench is cocked to one side when p...

Page 430: ...lug 7B 55 Oil Cooler a When conducting a routine engine inspection the oil cooler s lines and fittings should be checked for the following 1 Oil cooler line attachments should be examined to be certai...

Page 431: ...sult in high oil consumption as the additives in some of these oils can retard the break in of the piston rings and cylinder walls 2 All new or newly overhauled turbocharged engines must be broken in...

Page 432: ...by holding boost pump switch 4 to 10 seconds Place control in idle cut off Open throttle and unload engine by turning over with starter Open throttie to 1 8 of its range Clean and adjust or replace s...

Page 433: ...g Mixture too rich indicated by sluggish engine oper ation red exhaust flame at night Extreme cases indicated by black smoke from exhaust Mixrure too lean indicared by overheating or back firing Leaky...

Page 434: ...ods Flow meter reads high Clogged nozzie Remove and flush with acetone Blow through orifice with compressed air 100 psi Failure of engine to Throttle lever nut out of Adjust throttle lever develop ful...

Page 435: ...an oil pressure relief vaive See High Oil Temperature in Troubie coiumn Check vaive Replace gage Check line for obstruction Clean suction strainer Check sump for metal particies High oil temperature I...

Page 436: ...Weak barzery Faulry ignidon switch Worn piston rings Install new 1ings Incorrect installation of Install new rings piston rings Cold weather difficulties Cold oil Move aircraft into 3 heated hangar H...

Page 437: ...tment of Propeller GOVEIMOr vuvivreviinirennianenarnans 2GtS TC 18 ENBINE oo ittt e e e 2G17 7C 19 Removal of Engine ottt 2GH7 7C 20 Installation of Engine ttt 2G18 7C 20a Protection of Engine Mount i...

Page 438: ...ir Bleed Voule e e e Insuailation of Fuel Air Bleed Nozzles Ignition System Maintenance o Magneto e 7C 50 7C 51 7C 52 7C 53 7C 54 Inspccnon of Mzgnero Removal of Magneto Timing Procedure Intexnial Txm...

Page 439: ...supply pump as an integral part of the fuel injector system Two Rajay part number R 0080 102 turbochargers are attached to the engine Manual waste gate control of the turbocharger provides the pilot...

Page 440: ...Troubleshooting Troubles peculiar to the power plant are listed in Table VIIC 1l in the back of this section along with their probabie causes and suggested remedies When troubieshouting engines ground...

Page 441: ...that the master switch is OFF the magneto switches are OFF grounded and the mixture control is in the IDLE CUT OFF position 7C 9 Removal Of Propeller Refer to Figure 7C 1 Ascertain that master switch...

Page 442: ...y rocking the blades back and forth through the siight freedom ailowed by the pitch change mechanism if thev appear tight and are properly lubricated the propeller should be disassembied by an autnonz...

Page 443: ...arkings shall be mated to insure proper instailation d Lubricare and install O ring 9 in the propelier hub O ring groove e Mount propeiler on engine Screw each stud 7 into its mating lange bushing a f...

Page 444: ...han 0625 inch c Propellers having excess blade rack wd be removed and inspected for bent blades or for parts of sheared O ring or foreign particles which have lodged berween hub and crankshaft mountin...

Page 445: ...ciockwise rotation to increase engine speed One revolution of the fine adjustment screw increases or decreases the propeller speed approximartely 15 RPM d After serting the governor for high RPM run t...

Page 446: ...Low RPM 32 10 34 Propeller RPM Setting Engine Stati High RPM 2700 RPM Max Engine Saatic Low RPM 1600 50 RPM Min Propeller Torque Limits Descripdon Required Torque Dry Spinner Bulkhead 22 foot pounds P...

Page 447: ...temperature lead from the engine accessory housing k Disconnect vacuum hose at vacuum pump Disconnect oil cooler outler hose at engine accessory housing and inlet hose at oil cooler m Disconnect engin...

Page 448: ...ludnf y Connect starter cable to starver and clamp cable to left cylinder baffles and engine mount g Attach alternator leads to alternator and clamp them to right cylinder baffles and engine mount b C...

Page 449: ...on and shock mount with P N J 3049 35 in the bottom rear position Torque shock mount bolts to 450 to 500 in lbs with torque wrench applied 10 bolt heads and safety 7C 22 Turbocharger 7C 22A Turbocharg...

Page 450: ...gh manifold pressure lasts only for a few seconds This condition gan usually be overcome by smooth throttle advance A good melho advancing the throttle is a follows After allowing the engine oil to wa...

Page 451: ...il top mount on rurbocharger and secure with cap screws aid safety wire d Install blanket on turbine housing and secure with safety wire e Insuil rurbocharger assembly on engine insert washers between...

Page 452: ...11 AN FILTER BOX 12 CABIN HEAT DUCTS 13 EXHAUST MUFFLER 14 COMPRESSOR INLET DUCT 18 EXHAUST STACKS 16 TURBINE INLET DUCT 17 TURBINE BLANKET 18 WABTE SATE 19 EXHAUST SAS TEMPERATURE PROBE 20 TURBO OIL...

Page 453: ...PRESSURE 1 CEmTER sunn if tuie rLow 1 WETEN EN o FUEL A1R BLELD NOLILE YENT viLye i FUEL WsECTOR WOUCTION i o BELEF i DU IN COMPRESSOR o SECTION ENCINE EXNAUSY e IT I CONTROL LEVER QEDUCTION YALYE 10...

Page 454: ...l manifold pressure reads one half inch of mercury Less than the field barometric pressure e Stop engine f Without moving the waste gate control cable adjust the control lever back to its stop g Safet...

Page 455: ...are hoiding the filter securely c Close air box door and secure d Close cowl and fasten 7C 34 Alternate Air Door The alternate air door located in the induction system on the front side of the air pie...

Page 456: ...ormed before removing the instrument a Remove prv from exhaust stack and check for broken weld at tip end or bumnt end Measured resistance of probe should be 8 ohms b Disconnect lead wires at instrume...

Page 457: ...SEE VIEW A VIEW A 189 HOLE IN STACK CHOOSE A SUFFICIENT NUMBER OF ALTERNATE LARGE AND SMALL SPACERS TO LOCATE TIP OF PROBE WHEN ASSEMBLED NEAR CENTER OF EXHAUST STACK Figure 7C 5b Indicator Probe Inst...

Page 458: ...t been previously drilled locate the required hoie as foilows a Locate the Number 6 cylinder exhaust stack b Measure to a point on the exhaust stack 3 inches from the engine exhaust port Refer 1o Fig...

Page 459: ...l parts This condition however does not occur during normal operation of the i tor where fresh fuel is being constantly circulated 7C 37 Lubrication Of Fuel Injector a There is very little need for lu...

Page 460: ...roof container wrap the container with moisture and vapor proof material and seal Pack the wrapped unit in a suitable shipping case Pack 1 one half pound bag of silica gel crystals in the dustproof co...

Page 461: ...ANUAL MIXTURE 0o THROTTLE VALVE LINKAGE Co mg i L LE THROTTLE Vi CUT OFF LEVE LEVER 1 IDLE SPEED n A ADJUSTMENT i FUEL o INLET 1l CONSTANT HEAD V I oLe vaLve IDLE SPRING m LEVER CONSTANT EFFORT S oLE...

Page 462: ...e and mixture controls are adjusted when the throttle arm on the injector is rotated forward against its full throxtle stop and the mixture arm is rotated forward against its full rich stop their resp...

Page 463: ...is too lean e If the above indicares that the idle adjustment is too rich or too lean turn the idle mixture adjustment in the direction required for correction and check this new position by repeating...

Page 464: ...se wire or other hard objects to clean orifices b Inspect the nozzle and cylinder threads for nicks stripping or cross threading and battered or rounded hexagons c Inspect and replace nozzle O rings f...

Page 465: ...ence of moisture and foreign marter on the rubber grommet and high tension outlet side of distributor biock Check height of block contact springs 0 422 max from top of block tower to spring Also check...

Page 466: ...for cracks or looseness Using the Scintilla 11 1767 1 2 or 3 Condenser Testor or equivalenr check capacitor for capacitance series resistance and leakage Capacitance shall be at least 0 30 microfarad...

Page 467: ...of main contact assembly rests on highest point of cam lobe Adjust main contacr assembly to obrain the clearance of 0 016 inch Tighten main contact assembly securing screws ro 20 25 inch pounds 4 inst...

Page 468: ...from the housing the internal timing may be checied by turning the magneto in the normal rotation to number one firing position keyway up and main points just opening At this position the reference l...

Page 469: ...d forth slightly There must be perceptible backlash berween teeth of large and small gears This check should be made at three different points 120 apart on gear If backlash is not evident replace larg...

Page 470: ...the ground terminal of the magneto Then turn the engine crankshaft several degrees from the advance timing mark in direction opposite to that of normal rotation Turn on the switch of the timing light...

Page 471: ...tarter to prevent engine turning Hold No one piug head 5 16 inch from ground energize vibrator by turning switch to start Plug lead should throw 2 16 inch spark Observe spark at plugs spark cap If spa...

Page 472: ...l Of Spark Phugs a Loosen the coupling nut on the hamness lead and remove the terminal insulator from the spark plug barrei weil NOTE When withdrawing the ignition cabie lead connecton from the plug c...

Page 473: ...n dioxide by 2 Conical meral funnel adaprer with a hole at the apex just large enough to accommodare the funne of a CO2 bortle Refer to Figure 7C 16 When a seized spark plug cannot be removed by norma...

Page 474: ...perly seated on the spark plug hexagon as damage to the plug could result if the wrench is cocked to one side when pressure is applied b Carefully insert the terminal insulator in the spark plug and t...

Page 475: ...re the lockwire is replaced at both the attaching bolt head and the thermostatic oil cooler by pass vaive 7C 67 Turbo Oil Flow Check Refer to Figure 7C 17 Should an indication of low turbo oil pressur...

Page 476: ...EFT OVERDOOST PRESSURE RELIEF VALVE AP TURSOCHARGER RIGHT Tomsmeon IV DRAIM LEFT 4 FUEL INJECTOR WASTEGATE CONTROL LEFT TURBMME O1L DRAIN RIGNT ENEINEQ ot o q REBUCTION rressune sause FIGURE 7C 17 TUR...

Page 477: ...fins and cells When replacing the cooler properly align and do not over tighten the mounting bolts so that the cooler would be damaged While the oil cooler is removed the oil lines should be disconnec...

Page 478: ...lt in high oil consumption as the additives in some of these oils can retard the break in of the piston rings and cylinder walls 2 All new or newly overhauled turbocharged engines must be broken in an...

Page 479: ...correct throttle Open throtte to one setung tenth of its range Defective spark plugs Clean and adjust or Defective ignition wire Improper operation of magneto to breaker points Internal failure Frozen...

Page 480: ...re ignition system Regap spark plug Remove and clean paragraph 7C446 Check and clean Clean fuel strainer and check fuel pump Low power and uneven Mixture too rich in Check injector Adjust running engi...

Page 481: ...l injector Failure of engine to develop full power Throttle lever out of adjustment Leak in induction system Mixrure too lean or too nch Restriction in induction aur Improper fuel Propeller governor p...

Page 482: ...engine Low oil pressure Insufficient oil Dirry oil screen or filter Relief valve out of adjustment Defective pressure gauge Arr lock or dirt in reiief vaive Leak in suction line or pressure line High...

Page 483: ...peration ENGINE TURBOCHARGED Trouble Cause Remedy High oil temperature Insufficient air Check air inlet and cooling oudet deformation or obstruction Fill oil sump to proper levei Remove and clean oil...

Page 484: ...rings to seat Use mineral base oil New nitrided Climb to cruise alti cylinders tude at full power and operate at 75 cruise power setting until oil consumpuon stabilizes Low grade of oil Replace with o...

Page 485: ...rge duct ruprured ducting or disconnecred Severe rupture on ex Replace defective part haust stacks causing waste gate to be in effectve Turbocharger rotor Replace Turbocharger jammed Ruprured manifold...

Page 486: ...aspirated Cracked or loose cyl Repair or replace as inder cooling air required bafftes During climb Reduce power or open cowl flaps or increase Indicated Air Speed Over boost or RPM Reduce MAP or RPM...

Page 487: ...ormance Repuir engine as re quired Inspect airframe and repair s necessary Fuel consumption is higher than normal Mixture set too rich Leak in fuel system Prolonged high power at full rich mixrure Hor...

Page 488: ...e to be in very on engine poor condition to r nitod to pass the compressor im peller seal Turbocharger drain Reroute for clear flow line misrouted or or remove obstruction plugged from line Noisy Turb...

Page 489: ...2 1M INTENTIONALLY LEFT BLANK...

Page 490: ...rne Mechanisms PA 24 400 8 17 Installation Of Fuel Selector Valve oot 8 18 Cleaning The Fuel System iuiiiiiniririiiinereennnnieeenes 8 19 Ul SIaINeIS Lttt it et i e e 8 20 Fuel Strainer PA 24 180 and...

Page 491: ...moval Instructions When necessary for any reason to remove the fuet cell from the cavity or to collapse it within the wing it is suggested that the fuel cell be drained then flushed spraved or rubbed...

Page 492: ...COVER PLATE GASLET SENOER UNIT SLATE CELL FASTENER CAP BOLT BEMOKA UMIT PLATE fURL CELL SASAET FULL CELL FUEL CILL COMPARTMENT ACCESS PLATE CLamp AILLER Mus DRAIN TUSC SENOER YMIT RCMLT VENT TUSK VEN...

Page 493: ...LECTRIC FUEL PUMP FUEL _ ELECTRIC FUEL PUMP PP SWITCH PUMP SWITCH L MER PUNP O Pann PP ENGINE FUEL PUMP vor VENT e WXTURE THROTTLE CARBURETOR CARSURETOR PRIMER NOZILES PRIMER MOZILES _ e SERUL RES 24...

Page 494: ...NUAL FUEL SENDER AUX FUEL CELL INBOARD FUEL CEU FUEL PUMP SWD __ PRESER PUNP o CARBURETOR _ o PRIMER NOZZLES CARBURETOR SYSTEM FIGURE 83 FUEL SYSTEM SCHEMATIC PA 24 250 Serial Nos 24 105 to 24 2298 21...

Page 495: ...1 ELECTRIC FUEL PuMeP FUEL FLOW GAGE AUX FUEL CELL FUEL INJECTION SYSTEM FUEL NOZ2LES PRIMER NO22LES CARBURETOR SYSTEM FIGURE 84 FUEL SYSTEM SCHEMATIC PA 24 250 Serial Nos 24 2299 ond up ond PA 24 260...

Page 496: ...PIPER COMANCHE SERVICE MANUAL 2882 X FUEL CELL FIGURE 85 FUEL SYSTEM SCHEMATIC PA 24 260 TURBO 2118 FUEL SYSTEM ISSUED Bll b...

Page 497: ...2119 INTENTIONALLY LEFT BLANK...

Page 498: ...PIPER COMANCHE SERVICE MANUAL FIGURE 86 FUEL SYSTEM SCHEMATIC PA 24 400 FUEL SYSTEM ISSUED 8 18 72 2120...

Page 499: ...andling And Storage When synthetic rubber fuel cells are placed in service the gesoline has a tendency to extract the plasticizer from the inner liner of the fuel cell This extraction of plasticizer i...

Page 500: ...inger tight Do this once Do not re tighten unless the hose clamp is loosened completely and allowed to set far 15 minutes before re tightening e Do nat use sealing paste or gasket compound f Apply a t...

Page 501: ...to be checked Refer to Draining Fuel Cells Section II 2 Level the airplane longitudinally and laterally Refer to Leveling Section II 3 Connect a 14 volt power supply to the airplane electrical system...

Page 502: ...ce except for individual PA 24 400 auxiliary cell senders which should indicate 14 6 to 16 3 ohms resistance If incorrect resistance or fluctation is found the sender should be replaced c Wiring Check...

Page 503: ...ir of Fuel Cell ao o CAUTION No repairs are 1o be made on the radius of a cell or in the fitting area of a cell Cells with such damage are to be returned to the factory for repairs No damaged areas su...

Page 504: ...to dry 10 to 15 minutes 6 Freshen cemented area of patch and cemented area of cell with Methyl Ethyl Ketone solution U S Rubber Co 3339 7 While still tacky apply edge of patch to edge of cemented are...

Page 505: ...oved from the aircraft remove the valve cap 1 and interior parts b Inspect the position washer 7 inner perimeter surface for indications of wear should this be evident replace washer c Check the condi...

Page 506: ...tion valve need only be serviced when there are indications of binding or leakage around the valve shaft 1 Figure 8 12 at the mating surface of the upper valve body 10 and lower valve body 6 or if rea...

Page 507: ...afery 8 16 Servicing Fuel Valve Airborne Mechanisms PA 24 400 The fuel valve Figure 3 3 on the PA 24 400 is 2 combination fuel strainer and selector vaive Servicing the fuel strainer will be described...

Page 508: ...he bowl bail up so that the bowl may be removed c Remove the bow gasket clean the filter screen and check for damage If the screen is punctured or the wire may be fraying from the screen it should be...

Page 509: ...lter disc assembly strainer bowl drain hose and fuselage panel 8 23 Fuel Strainer Bendix Plunger Pump PA 24 180 PA 24 250 and PA 24 260 with car buretor induction a Remove the safety wire securing the...

Page 510: ...ph 8 22 b Disassemble the plunger spring cup 8 by removing the three screws 3 securing the cup Gently touch the plastic cup valve 5 with your finger If it is free do not remove the valve spring Do not...

Page 511: ...eck for leakage CAUTION Do not tamper with seal at center of mounting bracket at side of o pump as it retains the dryv gas which surrounds the electric system _ in the upper portion of the pump 8 1 6...

Page 512: ...vane type positive displacement pumps driven by 12 volt DC motors Each model has a built in pressure relief valve which functions to bvpass fuel via internal passages to the inlet port The mortor driv...

Page 513: ...mbly on a 7 surface use a 15 16 diameter flat faced brass drift in an arbor press to press the shaft seal 12 home in he housing assembly 3 d Place the inseruon tool Figure 8 17 over the end of the rot...

Page 514: ...retor b Check the operation of the engine driven pump with the engine operating from low thru high rpm and the electric pump off The clectric fuel pump pressure may be checked with the engine shut dow...

Page 515: ...m Turn fuel selector vaive to the OFF position Remove the fuel lines from the pump and disconnect th tiectrical leads c Loosen the clamp which secures the fuel pump to the aircraft ap NOTE Do not atte...

Page 516: ...PIPER COMANCHE SERVICE MANUAL TABLE VHI iI l TN N N A 0 10 20 30 4 85 70 8 90 100 ROWGPH FLOW VERSUS PRESSURE AT 14VDC FUEL SYSTEM ADDED 9 10 78 2J14...

Page 517: ...a To check the flow of the pump disconnect the supply line within the engine compartment where the line divides to go to the left and right cylinders Operate the pump sufficient fuel should flow to s...

Page 518: ...ion System There are two locations along the fuel flow gauge pressure line which have a damper installed One is between the fire wall and the gauge while the other is between the flow divider and the...

Page 519: ...gs No fuel pressure indication Fuel valve stuck No fuel in tanks Defective fuel pump Defective gage Check valve Check fuel fill Check pump for pressure build up Check diaphragm and relief valves in en...

Page 520: ...ST TAM820 1024 1121127524 MCHUTE MASONITE OR HARSWOOD Lanesgit 112414 250 NCHLITE MASOWITE 08 NARSWOOD 415 2 AR15 10 32 2 125011 37524 875 2024 T3 MW 2 AI20 18 24 BACKME SCREW 4 ANS80 10 WASHER 2 AN31...

Page 521: ...PIPER COMANCHE SERVICE MANUAL Revised 8 15 98 THIS PAGE INTENTIONALLY BLANK 2J19 FUEL SYSTEM...

Page 522: ...PIPER COMANCHE SERVICE MANUAL FUEL SYSTEM GRIDS 2J20 THRU 2L24 INTENTIONALLY BLANK 2J20 Revised 8 15 98...

Page 523: ...Y ENPIPER AIRPLANE SERVICE MANUAL CARD 3 OF 3 COMANCHE PA 24 180 PA 24 250 PA 24 260 PA 24 260 TURBO PA 24 400 PIPER AIRCRAFT CORPORATION PART NUMBER 753 516 REVISED AUGUST 15 1998 3A1...

Page 524: ...Member General Aviation Manufacturers Assoclation Published by Technical Publications The New Piper Aircraft Inc 2926 Piper Drive Vero Beach Florida 32960 US A 3A2...

Page 525: ...current by revisions distributed periodically These revisions will supersede all previous revisions and will be complete Acrofiche card replacements and shall supersede Aerofiche cards of the same num...

Page 526: ...a single serial number list No serial numbers duplicated PARTS This manual generally does not contain hardware callouts for installation Hardware callouts are only indicated where a special applicati...

Page 527: ...NSPECTION STRUCTURE SURFACE CONTROLS LANDING GEAR AND BRAKE SYSTEM AEROFICHE CARD NO 2 POWER PLANT PA 24 180 POWER PLANT PA 24 250 AND PA 24 260 POWER PLANT PA 24 400 POWER PLANT PA 24 260 Turbo FUEL...

Page 528: ...ethod Checking Current Lead Method Jumper Lead Method Alternator and Starter Wiring System Cross Sectional View of Alternator Checking Rotor Slip Ring End Frame Checking Stator Checking Diodes Brush H...

Page 529: ...n Heater Defroster and Fresh Air System PA 24 400 Cabin Heater Defroster and Fresh Air System PA 24 260 Serial Nos 24 4783 24 4804 and up Instrument Panel Avionics Antenna Locations NOTE Refer to Elec...

Page 530: ...8 9 29 9 30 9 9 9 99 9 31 32 33 34 35 9 36 9 o o 37 38 39 9 40 ISSUED 8 18 72 Cutout Relay Voltage Regulator Current Regulator Resistances Temperature Compensation Regulator Polarity Regulator Mainten...

Page 531: ...Alternator Checking Alternator System Adiustments Overhaul Of Alternator Disassembly Of Alternator Inspection And Testing Of Componenls Assembly Of Alternator Testing Of Alternator Precautions Aitern...

Page 532: ...Percent C2 9 95 Charging Batterv e c 9 96 Starting Through External Power Receptacle With Airplane s Battery Nearly Depleted ot C 9 97 Removal and Installation of Battery coiiiieiiiinnnn 3C22 9 98 Rem...

Page 533: ...ihg e 3 AN INTENTIONALLY LEFT BLANK...

Page 534: ...d a 90 ampere magnet circuit breaker ganged to the S ampere circuit breaker in the field circuit The generator or alternator is located on the front lower right side of the engine and utilizes a beit...

Page 535: ...HE SERYICE MANUAL a1 WASTER CIRCUIT PROTECTOR J GENERATOR CIRCUIT PROTECTOR P VOLTAGE REGULATOR STARTER STARTER SOLENOD _ T T Figure 9 1 Generator and Starter Wiring System ELECTRICAL SYSTEM REVISED 4...

Page 536: ...ulator is at fault and it should be checked for a high voitage setting or grounds c Low Battery and High Charging Rate This is normal generator regulator action Regulator settings may be checked as ou...

Page 537: ...ctions can be inspected 1If the commutator is dirty it may be cleaned with a strip of No 00 sandpaper Never use emery cloth to clean the commutator c The sandpaper mayv be used by holding it against t...

Page 538: ...ed every 100 hours 9 8 Shunt Generator OQutput The maximum output of shunt generators is determined by the cur rent setting of the current regulator with which the shunt generator is used Checking of...

Page 539: ...or an open circuit with a test lamp The lamp should light when one test point is placed on the field terminal or grounded field lead and the other is placed on the brush holder to which the field is c...

Page 540: ...eld circuit would prevent normal regulation so that excessive output might be produced by the generator On this type of unit an internally grounded field which would cause excessive output may be loca...

Page 541: ...already expiained in paragraph 9 10 b Grounded field coils may sometimes be repaired by removing them so they can be reinsu lated Care must be used to avoid excessive bulkiness when applying new insu...

Page 542: ...generator has been repaired and reinstalled or at any time after a generator has been tested it must be repolarized to ake sure that it has the correct polarity with respect to the battery it is to c...

Page 543: ...series winding in a direction to add to the magnetism holding the armature down and the contact points closed c When the generator slows down or stops current begins to flow from the battery to the g...

Page 544: ...just above the core The armature has a contact point which is just below a stationary coatact paint When the current regulator is act operating the teasion of a spiral spring holds the armature away...

Page 545: ...ll regulators Many Aircraft regulators have this resistor omitted 9 26 Temperature Compensation Voitage regulators are compensated for temperature by means of a bimetal thermostatic hinge on the ammat...

Page 546: ...arcing and buming of the relay contact points 9 30 Cleaning Contact Points The coatact points of a regulater will not operate indefinitely without some attention It has been found that a great msjori...

Page 547: ...8 Fixed Resistance Yethod a Connect a fixed resistance between the battery terminal and ground as shown in Figure 9 7 after disconnecting the battery lead from the battery terminal of the regulator Th...

Page 548: ...til it touches the screw head Final setting of the unit should always be made by increasing spring temsion never by re ducing it I setting is too high adjust unit below required value and then raise t...

Page 549: ...to assure that 8 10 amperes are flowing Cycle generator after each adjustment before reading voltage regulator setting with cover in place 9 34 Cutout Relay The cutout relay requires three checks and...

Page 550: ...RELAY CLOSING VYOLTAGE pensation should be checked by the following method Load Vethod a Connect ammeter into charging circuit as in Figure 9 13 b Turn on ail accessory load lights radio etc and conn...

Page 551: ...alling new spring readjust the unit setting as alreedy described 9 38 Radio By Pass Condensers a The installation of radio by pass condensers on the field terminal of the regulator or gen erator will...

Page 552: ...isture dust and oil vapors which might damage the regulator 7 The oper testing equipment in the hands of a qualified mechanic is necessary to as sure proper and accurate regulator settings Any attempt...

Page 553: ...r system Refer to Figure 9 15 a Ascertain that the ammeter is operating properly b Disconnect the battery and field leads at the aliernator Ascertain that all electrical units are off and the battery...

Page 554: ...PIPER COMANCHE SERVICE MANUAL 2580 g s 2 MASTER SOLENOD VOLTAGE REGULATOR QVER YOLT RELAY Figure 9 15 Alternator and Starter Wiring System 3B8 ELECTRICAL SYSTE REVISED 4 10 81...

Page 555: ...r tightness and the belt for alignment propertension and wear Belt tension should be adjusted in accordance with engine manufacturer s recommendations When tightening beit tension apply pressure again...

Page 556: ...test lamp or ohmmeter to each slip ring If the lamp fails to light or if the ohmmeter reading is high infinite the winding is open Figure 9 17 The winding is checked for short circuits by connecting...

Page 557: ...it in the stator windings is difficult to locate without laboratory test equip ment due to the low resistance of the windings However if all other electrical checks are normal and the generator fails...

Page 558: ...frame in the same manner Test Lamp Method An aitemate method of checking the diodes is to use a test lamp of not more than 12 volts in place of the chmmeter CAUTION Do not use 110 volt test lamps to...

Page 559: ...st fits over the outer race It is recommended that a new retainer plate be installed if the felt seal in the retainer plate is hardened or excessively wom The bearing in the slip ring end frame should...

Page 560: ...heat sink During reassembly note carefully the proper stack up of parts as shown in Figure 9 22 9 55 Reasssmbly Reassembly is the reverse of disassembly Remember when assembling the pulley to secure t...

Page 561: ...to the alternator is available from tool companies and test equip ment manufacturers normally sup plying equipment to the aviation trade Do not polarize altemator 9 37 Alternator Service Test Specific...

Page 562: ...e with speci slip rings ammeter readings fications in 1G 186 for shorts Stator Ohmmeter rom lead to frame Very low Grounded Fig 919 110 volt test lamp from lead to frame Lamp lights Grounded Ohmmeter...

Page 563: ...iscon nections exist the aew regulator will fail too Futhermore repeated replacement of regulators wil oaly result in repeated regulator failures and this will continue until the circuit defect is cor...

Page 564: ...reading is zero the NEG and FLD leads are reversed Circuit trace will be burned open between points A A B B or C C Figure 9 26 d If meter reads zero voltage disconnect lead at altemator F1 field termi...

Page 565: ...POS terminal For connections refer to the aircraft wiring diagram With the relay remored from the aircrafl an electrical check can be made on a test bench to determine if the relay i1s operating prop...

Page 566: ...ated at 150 peak inverse voltage PIV minimum for transient voltage protection Three positive rectifiers are mounted in the rectifier mounting plate while the three negative rectifiers are mounted in t...

Page 567: ...ional 2 The check of the F2 circuit should give a reading of approximately 12 volis or the test lamp should glow normally for an operational circuit 3 Both the main and auxiliary field circuits may be...

Page 568: ...CHE SERVICE MANUAL STARTER TN STaRTRG vtaTON RO 4 START PORTIONI om0 7 aLTERRATOR SpanL ComaCTon gat Figure 9 27b Alternator and Starter Wiring System Schematic Prestolite ELECTRICAL SYSTEM REVISED 4...

Page 569: ...Remove the safety wire from the through bolts Hold the pulley with a strap wrench and remove the pulley nut The pulley must be removed with a puller Remove the fan woodruff key and spacer from the sh...

Page 570: ...ference a Rotor The rotor should be tested for grounded or shorted windings The ground test can be made with test probes connected in series with a 110 volt test lamp an ohmmeter or any type of contin...

Page 571: ...s of wood In other words insulate the stator from the end head To test for grounded windings touch one test bulb ot ohmmeter probe to the stator frame If the test bulb lights or the ohmmeter indicates...

Page 572: ...er Reconnect the stator leads to the rectifiers When soldering these coanections use pliers as a hest dam on the lead between the soider joint and the recti fier Too much heat wiil damage the rectifie...

Page 573: ...it has been bench tested g Install the brush and holder assembly and retaining screws Spin the rotor and check for interference between the brush holder and rotor Check across the field terminals with...

Page 574: ...should be checked with a voltmeter before connecting the batters Most aircraft are negative ground f If a booster battery or fast charger is used its polarity must be connected correctly to present da...

Page 575: ...ver that has a hose type connec vion for air pressure ventilation Remove this cover when bench testing the alternacor 9 611 Alternator Service Test Specificotions Prestolite specifications for the 12...

Page 576: ...current will flow from the ignition terminal through the field winding through the collector emitter of T3 to ground d With the ignition switch on current will flow from the I terminal regulator grou...

Page 577: ...r only is to be used for circuit testing the battery need not be discon nected provided caution is used when connecting or disconnecting the voltmeter c When installing a battery in an aircraft be sur...

Page 578: ...ere electrical load or use a carbon pile across the battery to obtain this charge rate e After one minute operating time check the regulator operating voltage as indicated by the voltmeter Refer to Al...

Page 579: ...vent of a charging circuit malfunction b The overvoltage conmtrol consists of a mechanical relay and a solid state triggering de vice The solid state triggering device activates the mechanical relay w...

Page 580: ...defective cranking system the following checks should be made a Determine the condition of the battery b Inspect the wiring for frayed insulation or other damage Replace any wiring that is damaged Ins...

Page 581: ...with a test lamp 2 Open armmature coils Inspect the commucator for badly bumed bars after disassembly 3 Broken brush springs worn brushes high insulation between the commutator bars or other causes w...

Page 582: ...he pilot screw or pin can be removed NOTE Some Folo Thru Drives use a rubber cushion in place of a drive spring To remove from shaft screw pinion out to drive position then force pin from shaft throug...

Page 583: ...e field coils are open If the field coils need to be removed for repair or teplacement a pole shoe spreader and pole shoe screwdriver should be used Care sh uld be exercised in replacing the field coi...

Page 584: ...the starting circuit is energized b ry current is applied to the starting motor teminal Current flows through the field coils creating a strong magnetic field At the same time current flows through t...

Page 585: ...t is fully charged and filled to the proper level with approved water A load test should be made to determine battery con dition If dirt and corrosion have accumulated on the battery it should be clea...

Page 586: ...or press and the correct bearing arbor DO NOT HAMMER OUT Each part should be cleaned and inspected for excessive wear or damage Bearings should be checked for proper clearance and evidence of roughnes...

Page 587: ...rounded brush holders are touched and should not light when the insulated brush holders are touched 9 85 Gear And Pinien Housing Inspect housings for cracks and bearings for excessive wear Remove rust...

Page 588: ...l mesh properly with the flvwhee ring gear See specifications for unit for correct dimensions Refer to paragraph 9 90 9 88 Bench Tests a After the starting motor iS reassembled it shouid be tested to...

Page 589: ...he manual switch is released it should be removed and tested to specifications If either opening or closing voltages are not specified replace the solenoid 9 90 Sterting Motor Service Test Specificati...

Page 590: ...ckwise direction Observe the torgue shown on the wrench at the instent the pulley slips b Check the torque indicated in step 2 with torque specified in the following chart Width of Torque Indicated at...

Page 591: ...rting with a charging rate of four amperes and finishing with two amperes 9 94 Hydrometer Reading And Battery Charge Percent Hydrometer Readings Percent of Charge 1280 100 1250 75 1220 50 1190 P 1160...

Page 592: ...isconnect the battery cables NOTE Always remove the ground cable first and install last to prevent accidental shor circuiting or arcing Lift che barterv from the box e The barterv mav be installed in...

Page 593: ...e battery box or with the box remozed drain off any electrolvie that may have overflowed into the box b Clean the box and battery Corrosion effects mayv be neutralized by applying a solution of baking...

Page 594: ...ectrical lead from the base of the light assembly and disconnect the remaining electrical lead at the connector 9 106 Insmilarion Of Tail Navigaton Light 2 Install bulb and lens in light assembiy b Pl...

Page 595: ...ed to hold off the 450 volts D C spplied until the flash tube is triggered by an external pulse This pulse is generated by a solid state dming circuit in the power supply When troubleshooting the stro...

Page 596: ...for continuity from pins I 2 and 3 to airplane ground If continuity exists the cable is shorted and should be replaced d Check the tube socket assembly for shorts 1 Disconnect the tube socket assembly...

Page 597: ...rning lamp G E 1813 0 2 7 Landing lights 2 15 4 8 Rotating beacon 4 8 9 Master solenoid coil 0 68 10 Landing gear solenoid 26 11 Starter solenoid 10 0 at 12 volts 12 Turn and bank 0 9 13 Pitot heater...

Page 598: ...F 12 5 6 22 Sun Air Transmit 10 5 Sun Air Receive 35 23 Mark V 6 8 24 Mark V and VOA 3A 9 3 25 Mark V1 3 65 26 Mark X 12 10 27 Mark XIT 11 0 28 VOA 4 36 29 VOA 5 36 30 VOA 6 40 31 ADF T 12B 70 32 Narc...

Page 599: ...RNING HORN 1 9 70 380 PITOT HEAT 18 PITOT MEATING ELEMENT 7 20 730 ROT_BCN o5 ROTATING RED BEACON AS 403 480 RED ANTICOL 10 1 RED STROBE POWER SUPPLY ISYSTEM INSTALLED 140 248 VIHITE ANTICOL 10 WHITE...

Page 600: ...DISTANCE MEASURING EQUIP 6 77 TABLE IX il LAMP REPLACEMENT GUIDE Lucadon Piper Part No Lamp No Tail Navigation Light 753 431 1073 Wing Navigation Light 751381 1512 Rotating Beacon Grimes 752307 Rotat...

Page 601: ...9 76 3EI0 ENGINE SYSTEM Ignition PA 24 260 S N 24 4783 244804 Up 9 77 3EI0 DE ICE Pitot Heat 9 28 3D13 FLAP SYSTEM Flap Motor Flap Solenoid Indicator PA 24 250 S N 24 2844 Up PA 24 260 S N 24 4000 Up...

Page 602: ...PA 24 180 PA 24 250 S N 24 1 To 24 2843 INDICATORS Turn and Bank PA 24 180 PA 24 250 S N 24 2844 Up INDICATORS Turn and Bank PA 24 260 All INDICATORS Turn and Bank PA 24 400 S N 26 2 Up LANDING GEAR G...

Page 603: ...SYSTEM Landing Gear Indicator PA 24 400 All LIGHTING SYSTEM Navigation Instrument PA 24 180 S N 24 1 To 24 102 LIGHTING SYSTEM Navigation Instrument PA 24 180 PA 24 250 S N 24 103 To 24 2201 LIGHTING...

Page 604: ...PA 24 250 S N 24 103 To 24 655 24 2202 Up PA 24 260 S N 24 4000 To 24 4782 24 4784 To 24 4803 PA 24 400 S N 26 2 Up 9 32 WARNING SYSTEM Stall PA 24 260 S N 24 4783 24 4804 To 24 4934 9 33 WARNING SYST...

Page 605: ...NTIFICATION CIRCUITS A AUTOMATIC CONTROLS c CONTROL SURFACE E ENGINE INSTRUMENT F FLIGHT INSTRUMENTS G LANDING GEAR SYSTEM H HEATER VENTILATING i IGNITION SYSTEM L LIGHTING SYSTEM M CIGAR LIGHTER P PR...

Page 606: ...BLOCK POTENTIOMETER s olo 10 O O 0 0 g I 1 t o 0 13 c S olo PRESS N C PRESS N O OR OR LAMP VACUUM N O VACUUM N C ZENER DIODE OI0DE FUSE e QSO AN BUTT CONNECTORS L1 FiLTes L T i PUSH BUTTON SWITCH SWIT...

Page 607: ...3 s is 4 2 4 a2 2 3 AuL MoDELS Pa 24 25 e mooeLs Pa 24 2 FIGURE 9 28 PITOT HEAT FIGURE 9 29 ROTATING BEACON ASH 20 A sa2 SEZ LANDING a SEE STARTER 1S4 LIGHTS DIA c snn LIGHTER IGNITION Dia CIGAR LIGHT...

Page 608: ...ERIAL NO S 24 4784 TO 24 4803 2 PA 24 400 SERIAL NO S 26 2 UP 21 PA 24 260 SERIAL NO S 24 4783 24 4804 TO 4934 FIGURE 9 32 STALL WARNING FIGURE 9 23 STALL WARNING a872 A 800 Y 204 F3L snLL WARNING 7 r...

Page 609: ...S e e R OIL TEMP I gg GAUGE Ba _ J ENGINE UNIT P8 24 190 PA 24 230 SERAL NO S 24 636 TO 24 2201 FIGURE 9 38 FUEL GAUGE OIL TEMPERATURE GAUGE DOME LIGHT ASTS 0 C2A8 AR E1a o 5 8 BTN UEL GAUGE TEMP NO A...

Page 610: ...PERATURE GAUGE DOME LIGHT OIC 1 1 221 9C ca 24 80 SERIAL NO S 24 2844 B UP 318 UEL SAUGES QIL TEMP GAUGE 8 DOME LIGHTS L TO CARB AIR MAIN MAIN E e TEMP IND c5A a 3iA 834 FUEL G A UGES 9 x ch o TEMP I...

Page 611: ...N TO CARB AIR TENP IND e E A w SUELrgAuGES Qra L TEMP GAUGE 34 CYL WD TEMP DOME LTS 6T Q60 L ouT so R OUT BO o GTE GTA FTE _ e v a FUEL QUANTITY SW S E 24 24 230 SERIAL NO S 24 2844 8 UP FIGURE 941 FU...

Page 612: ...4782 8 24 4784 TO 24 4803 FIGURE 9 42 FUEL GAUGE OIL TEMP GAUGE DOME LIGHT CYLINDER HEAD TEMP Y5 A FUEL GAUGES L o TEMP GAUGE QOME LT S FRT_REAR R Q48 70 A R e oo bo B T ourss Q lp L2 T o ouT 8D FUEL...

Page 613: ...o_g Q7G 40 FUEL SENDERS PA 24 400 SERIAL NO S 26 2 UP oFy LAE RIGHT RIGHT LEFTY LEFT QUT 3D 5 IN 9D o IN BD ouT 80 FUEL GAUGES OlL TEMP CYL 40 TEMPIND COME LIGHTS OCME LTS Q switcHes a5 DOME LIGHTS o...

Page 614: ...04 TO NAV LTS SW L3A JTURN 8 BANK Fia Fic 7 NT88 Gw2 INDICATOR FID Ll P Z IIO A PA 24 250 SERIAL NO S 24 2844 B Ul FIGURE 9 45 TURN BANK FIGURE 946 TURN BANK A903 5A I TURN BANK F1A TAaB Y INDICATOR F...

Page 615: ...24 2201 e ma 24 250 SERIAL NO S 24 103 TO 24 635 FIGURE 949 FUEL PUMP FIGURE 9 50 FUEL PUMP ASie 0a A 0a TO NAV LTS Sw TL34 afun PUMP TO NAV LTS sw izl_ 2 FugL PumP T F 0T88 m oL T T80 Fa FUEL PUMP S...

Page 616: ...e s 204 204 FUEL PUNMP J FUEL PUNMP SEE FIG L e o FUEL PUMP SW G928 1o _L 528 1 o J g2 Q20 T IFI JJEELCT 10N Q2 E FUEL PUMP oRG HOOK UP A _I_ l_ soueno0 FoeLpunel L LUERS 1 T e T GRS 50 L T T FiGuRET...

Page 617: ...S 26 2 UP FIGURE 9 57 FUEL PUMP FIGURE 9 58 ELECTRIC TRIM TO FUEL PUMP Q 24704 L35 L34 lNAvnsA noN a T0TA 8 FIA INSTRUMENT LT S e 38 D e L T 3K o MAV INSTR T 360 LIGHTS Sw OrM OMMER 1w Q compass g L G...

Page 618: ...A 24 180 8 PA 24 250 SERIAL NO S 24 103 TO 24 2201 I _I_ _r_ LIGHTS _L f_ L ic_ 30 7L N TAlL RT T3 Praw __r __lv_ ARGy L T FIGURE 3 60 NAVIGATION INSTRUMENT LIGHTS NAV INSTR LT Sw NAV INSTR LIGHTS Sw...

Page 619: ...IGHTS T30 ol 3 L LEFT 2 Pa 2 180 sERIAL NO S 2 2044 8 UP FIGURE 9 82 NAVIGATION INSTRUMENT LIGHTS Asoe 10A 640 1A NAVIGATION L 548 rotae JINSTRUMENT LiGHTS a2 T 538 69 214 70 Juvncmou LIGHTS Lro cean...

Page 620: ...TO AUTOCONTROL IX OR ALTIMATIC I WHEN INSTALLED e e e L g 3 a0 LIGHT STABILATOR TRIN INO LT i 4 e D NSTRUMEN L86 8K oL e L Y i N oL T8 _L RED e F w 3K P g _r 30 03 I S LU Dot T 38 ony L ey L LEFT C3F...

Page 621: ...8 2 80 o l pon L f 4 0 A 3 0 e GLAR BAN GLAR BAN LIGHTS LIGHTS LEFT RIGHT 24312 S PA 24 400 SERIAL NO S 26 2 UP zl LIGHT i L 3 N e L I 3K 30 13C 30 Q3E L39 _w NAV 8 INSTR LIGHTS SWITCH DIMMER INSTRUME...

Page 622: ...NTROL o _ 18 r e T __f_ j__ _ q L3M 8 3 L3K 3 3 T8 816 Lo v 29 1 2 T TOSW LTS 3 10 A L L o E a L ow T STABLATOR TRIM WD LT T30 c o xv OVERHEAD C20R 7 Qi NsTRUMENT T I L30 8 r QQ 5E TTP 10 DOME 3N Q4 L...

Page 623: ...8 UP NOTE PA 24 260 SERIAL NU S 24 4783 24 480448 UP ONLY FIGURE 9 67 FLAPMOTOR FLAP SOLENODID INDICATOR Asos FLAP SOLENOQID FLAP SELECTOR SWITCH SHOWN IN DOWN POSITION 7O STARTER SOLENOID v FLAP SQLE...

Page 624: ...AR MOTOR C Fsa 1 s GEN FIEL DD REGULATOR o PA 24 180 SERIAL NO S 24 1 TO 24 102 Figure 9 69 Generator 35 Amp PA 24 180 Asre l_ STARTER 3sa o SOLENOID P2s STARTER MASTER C P P4g vo i _ aeE 1_ 9 7 a Y a...

Page 625: ...O S 24 656 TO 24 220I Figure 9 71 Generator 35 Amp PA 24 180 250 AB01 22127 A STARTER_SOLENOQID STARTER 1 _ K34 g PIB e MASTER SOLENOID ST FIZA STARTER SWITCH MASTER SWITCH R masteR c p O MAIN BUS O G...

Page 626: ...ATOR 824 4784 70 24 4803 Figure 9 73 Alternator 85 Amp PA 24 260 P28 Fy STARTER 228 SOLENOIO T K380 _ S G a ammeren z s STARTER T SoLENOD s _ f _ L 3 TO STARTER SW o J2A e L e Q8 ER SW L _ OVERVOLTAGE...

Page 627: ...ERNATOR FiELD 3 AMP 2679 0 ALTERNATOR 2_ a8 amP ofo 1 1 FIREWALL CONNECTOR o lmrsn Py BLx t RED P _ e BLY _ 4 JALTERNATOR llu Y l 1 VOLTAGE REGULATOR S E E f 12 aan 58 24 260 SEQIAL C S 24 4783 24 480...

Page 628: ...UP PA 24 260 SERIAL NO S 24 4000 TO 24 4782 24 4784 TO 24 4803 PA 24 400 SERIAL NO S 26 2 UP RIGRT MAGNETO 8 e Figure 9 76 lgnition A912 i5A STARTING J El IGNITION VIBRATOR STARTER SWITCH R snown JIA...

Page 629: ...G1a GEAR INDICATOR A LIGHTS n D G i1 8 G24 MOTOR GI2A ARM UP n GEAR it G208 r Y L0 sELect SWITCH TR SWITCH r T N 9 G228 B 1 GITE NC B NO NC LEFT GEAR DOWN RIGHT GEAR LIMIT SW IOB o own LT SW CemD CED...

Page 630: ...DOWN SA LIMIT SWITCH G2n GiA V JBGEAR INDICATOR LIGHTS Gha 54 D G28 G24 fE MOTOR ARM UP SizA Lfl oo GEAR LIMIT S _MsELEcT svm cu wo G7A 374 SWITCH So up oN Giad T s GI7B D NO Ne 00 O LEFT GEAR DOWN RI...

Page 631: ...AIR FIGURE 9 81 CARBURETOR AIR TEMPERATURE INDICATOR A 08 TEMPERATURE INDBICATOR 54 sa CARBURETOR AR 20 O EXMAUST GAS TENP TEMP IND MDICATOR 0 FULL dAUSES 0 FUEL GAUSES Ol TEMP OlL TEMP DOME LTS ooME...

Page 632: ...OTTLE SWITCH G5 g NC _r o NC NOSE GEAR DOWN GR LIMIT SWITCH G2a GIa b GEAR INDICATOR s LIGHTS 8 24 voron 1 ARM UP _JD 0 GEAR umitT G208 QPO _A sELecT 28 SWITCH GT7A SWITCH 2 NC bt TP N C go G228 T NO...

Page 633: ...ITCH SWITCH c DOWN LIMIT NO NC ON L MAIN SWITCH ggiE GteA Down SWITCH _l GI3B TN 7 G2E 62D v ATEEN AR GI13A GIgB a25c Gl2A 5280 Gase G5B cNO CP P GIE g l _ GiC r HORN o NC GIB G24A THROTTLE SW 6258 __...

Page 634: ...CTOR upP D SWITCH ETY 20 it LANDING GEAR MOTOR o ANPING SEAR MOTOR 204 O NO FIELD COIL BRAKE MOTOR Y SQLENOQID ARM UP LIMIT O G65C SWITCH Yo 20 621A G5A 12 ElE I IFTUP NOTE SHOWN GEAR DOWN SELECT SWIT...

Page 635: ...GEAR o DOWN LIMIT __ 7 saFeTY RIGHT GEAR SWITCH SWITCH aume T NO ne foN L Main NOSE GEAR oC L DOWN LIMIT 6134 SWITCH C C 4 18 E GIlA 1 18 _I 18 F GlA AT 318 3 18 G 613A 2 18 Y H Gi8 5 18 J i GasD G25e...

Page 636: ...985 22759 C 24372 5 25744 E 2679 3 0 PIPER COMANCHE SERVICE MANUAL ASTY EXTERNAL EXTERNAL MASTER POWER CONTAC OR RECEPTACLE 1 MASTER Sw LYO B8US BAR STARTER CIRCUIT PA 24 ALL MODELS OPTIONAL FIGURE 9...

Page 637: ...er etc on ground use extemnal power wherever possible Remove and recharge battery if left in unused airplane 3 weeks or more Remove and recharge Repiace Check wiring Replace Battery life is short Over...

Page 638: ...zes Discharged battery Water added and battery not charged immedi ately Replace Always recharge battery for 1 2 hour following addition of water in freezing weather Leaking battery jar Frozen Replace...

Page 639: ...brush wears down to 1 2 inch replace with a new one CAUTION Do not use abrasives of any description in seating the brushes The brushes should be a free fit without excessive side play in the brush box...

Page 640: ...in rated speed range but voltage output low above Replace voltage regulator Use remedy under Gen erator operating within rated speed range but voltage output low above Excessive sparking at generator...

Page 641: ...raph 9 44 Reduced output from Open diode Check alternator Refer to alternator Paragraph 9 44 STARTER Motor fails to operate Low battery charge l Check and recharge if necessary Defective or improper R...

Page 642: ...utator with the sanded side next to the brush Pull sand paper in the direction of rotation being careful to keep it in the same contou as the commutator CAUTION Do not use coatse sandpaper or emery cl...

Page 643: ...rate Disassemble clean inspect and relubricate replacing ball bearings if worn Same remedies listed for these troubles Excessive arcing of motor brushes Binding worn or improperly seated brush or brus...

Page 644: ...3 Fb INTENTIONALLY LEFT BLANK...

Page 645: ...SECTION X CABIN HEATER AND VENTILATOR SYSTEM Acrofiche Grid No 10 1 General 3F8 10 3 Heater Maintenance 3F8 ISSUED 8 18 72 3 F6...

Page 646: ...3 F1 INTENTIONALLY LEFT BLANK...

Page 647: ...ble ventilators located bexide each seat and one larger ventilator located under the instrument panel on the lett side of the cabin For the late PA 24 180 and PA 24 250 aircraft fresh air is supplied...

Page 648: ...LET HOBE 6 DEFROSTER IAR BOX 7 DEFROSTER AR TAKEOFF ASSE MBLY 0 DEFROSTER AM OUTLET CASIN FRESH A R BOX 10 CABIN FRESH AR INLET HOSE 11 CABIN FRESH AIR DIST RIBUTION ASSEMOLY 12 CABIN HEATER DEFROSTEI...

Page 649: ...ATER INLET 1 HEATER QUTLET DEFROSTER OUTLET CABIN YENT CONTAOL OEFROSTER CONTROL CABIN MEAT CONTROL CABIN VENT CONTROL CADIN EXWAUST VENT SERtAL NOS 2442202 TO 2442298 coRNG BAWN FIGURE 10 2 CABIN HEA...

Page 650: ...R QUTLET W CABIN FRESH AIR BEN CABIN HEATER AIR y CABIN EXHAUST AIR DEFROSTER INLET DEFROSTER OU TLET CABIM AIR AND DEFROBTER CONTAOLS CABIN EXMAUST AIR OUTLET FIGURE 10 3 CABIN HEATER DEFROSTER AND F...

Page 651: ...HEATED AR OUTLET DEFMOSTER OUTLET CABIN TENAUST AIR OUTLEY CANIN AN b GEFROSTER COMTROLS CARBURITOR AIR aNGurALN FIGURE 10 4 CABIN HEATER DEFROSTER AND FRESH AIR SYSTEM PA 24 260 Serial Nos 24 4000 to...

Page 652: ...IR QUTLET DEFROSTER OUTLET CABIN EXHAUST AIR OUTLET CABIN AtR AND DEFROSTER CONTROLS CARBURETOR AIR FIGURE 10 5 CABIN HEATER DEFROSTER AND FRESH AIR SYSTEM PA 24 260 Serial Nos 244247 24 4300 to 24 47...

Page 653: ...SH AIR QUTLET HEATEQ AIR INLET HEATED AIR QOUTLET OEFROSTER OUTLET CABIN EXHAUST AIR QUTLET CABIN AIR DEFROSTER CONTROLS NP e s FIGURE 10 6 CABIN HEATER DEFROSTER AND FRESH AIR SYSTEM PA 24 400 3F14 C...

Page 654: ...ED AIR INLET 4 HEATED AIR OUTLET A 5 DEFROSTER OUTLET G 6 CABIN EXHAUST AIR OUTLET 7 CABIN AIR AND DEFROSTER CONTROLS FIGURE 10 7 CABIN HEATER DEFROSTER AND FRESH AIR SYSTEM PA 24 260 SERIAL NOS 24 47...

Page 655: ...emoval And Replacement Of Face Mounted Instruments 11 19 GENETAL oot e e 11 20 Removal And Replacement Of Cluster Mounted Instruments 11 21 General e e e e 11 22 Directional Gyr0 vttt e 11 23 General...

Page 656: ...rical Instrument Turn And Bank Indicator 11 63 General 11 64 Removal And Replacement 11 65 Troubleshooting Oil Temperature Indicator 11 67 General e e 11 68 Removal And Replacement 11 69 Troubleshooti...

Page 657: ...n air driven gyroscope rotating in a horizontal plane and is operated by the same principal as the directional gyro Due to the gyroscopic inertia the spin axis continues 10 point in the vertical direc...

Page 658: ...xiliarv fuel quantity gauges wiil be instalied in the instrament cluster n the Comanche PA 24 250 Serial Nos 242844 and up PA 24 260 and PA 24 300 onlv one fuel quantity gauge is incorporated in the s...

Page 659: ...t the plumbing and or electrical connector from the back of the instrument Where two or more lines connect to an instrument identify each line to facilitate reinstallation Attach a dust cap or plug to...

Page 660: ...tely after removal from the aireraft not to exceed 15 days following discovery of defect 11 11 Vacuum Sywem The vacuum system empioyed to operate the gyro insuments is comprised of an engine driven va...

Page 661: ...ng procedure 2 Remove the top portion of the engine cowling b Loosen the two hose clamps and remove the two hoses from the vacuum pump fittings dentify the hoses 10 aid in reinstailation Remove the fo...

Page 662: ...No vacuum pressure gauge indication at instrument Hose from instrument to gauge leaking or restricted Check all lines and connections No vacuum suction gauge indicacion at either instrument or source...

Page 663: ...TO STARTER 38 THROTTLE 8 ALTIMETER 24 FUEL PUMP 40 NAV APPROACH COUPLER 9 OMNI INDICATORS 25 PITOT HEAT 41 FLAP POSITION INDICATOR 10 MARKER BEACON LIGHTS 26 POST LIGHT SWITCH 42 PAOPELLER CONTROL 11...

Page 664: ...PIPER COMANCHE SERVICE MANUAL THIS PAGE INTENTIONALLY BLANK Revised 8 15 98 INSTRUMEN I 3G1...

Page 665: ...PIPER COMANCHE SERVICE MANUAL GRIDS 3G2 THRU 3G4 INTENTIONALLY BLANK INSTRUMENTS Revised 8 15 98 3G2...

Page 666: ...engine gauges and sending unit systems which are no longer available For replacement engine gauges and sending units see the current Comanche Parts Catalog P N 752 464 or Piper Service Spares Letter N...

Page 667: ...m Replace 11 26 Gyro Horizon 11 27 General The gyro horizon is essentially an air driven gyroscope rotating in a honzontal plane and is operated bv the same principal as the directional gvro Due to th...

Page 668: ...shim mies continuousiy Excessive vibration Vacuum too high Defective mechanism Check shock mounts Replace if necessary Adjust valve Replace instrument 11 30 Rate Of Climb Indicator 11 31 General The...

Page 669: ...tive Aldmerer 11 35 General The altimerer indicates pressure altitude in feet above sea level The indicator has three pointers and dial scale The long pointer is read in hundreds of feer The middle po...

Page 670: ...ker fails to move when setting knob is rotaced Out of engagement Replace instrument Setting knob set screw loose or mussing Excessive vibrazion Tighren mstrument screw if loose Replace in strument if...

Page 671: ...nd miles per hour and aiso has the necessarv operating range markings for safe operation of the airplane 1140 Removal And Replacement Refer to Paragraph 11 18 of this section 11 1 Troubleshooting TABL...

Page 672: ...rly Compensate instrument compensuated Exrernal magnetic inter Locate magnenc inter ference ference and efiminate if possible Excessive card Improper mounung on i1n Align instrument oscillation strume...

Page 673: ...ror when Line leaking Tighten line connections engine is running 4 Sluggish or jerky pointer Improper damping adjustment Adjust damping screw morement Broken or loose cover Virbration or excessive Rep...

Page 674: ...pressure available at the pressurized engine oil passage 11 55 Removal And Replacement Refer to Paragraph 11 20 of this section 11 56 Troubleshooting TABLE XI X ENGINE OIL PRESSURE GAUGE Trouble Cause...

Page 675: ...ooting TABLE XI XI FUEL PRESSURE GAUGE Trouble Cause Remedy No fuel pressure indi Fuel valve stuck Check valve cation No fuel in tanks Check fuel fill Defective fuel pump Defective gauge Check pump fo...

Page 676: ...65 Troubleshooting TABLE XI XI1 TURN AND BANK INDICATOR Trouble Cause Remedy Pointer fails to respond Foreign marter lodged in instrument No electrical circuit Replace instrument Check for voltage at...

Page 677: ...nary Excemive clearance between Replace instrument rotor and rotor pivots Ball in inclinometer does nsrrument out of alignment Correct alignment h not center on panei 11 66 Oil Temperature Indicator 1...

Page 678: ...is section 11 73 Troubleshooting Refer to Section IX Elecrrical Section 11 74 Fuel Quandcy Indicator PA 24 180 Serial Nos 241 and u and PA 24 25 0 Serial Nos 241 0 24 2843 incl 11 7S General Two fuel...

Page 679: ...lve shaft Defective override switch Replace selector switch Determine which switch is maifuncrioning replace switch Fuet gauge indicares over full ncomplete ground Check ground connections at fuel cra...

Page 680: ...uel selector plate under the desired fuel cell position The fuel gauge will indicate the amount of fuel available in that cell When che red button is released the indicating system will return to its...

Page 681: ...NTITY INDICATORS cont Trouble Cause Remedy Fuel gauge indicates zero Fuel selector in OFF position Shorted connection at selector switch or other wiring Normal Check switch and winng INSTRUMENTS ISSUE...

Page 682: ...J G21 mru 3 624 INTENTIONALLY LEFT BLANK...

Page 683: ...2 Piper Automatic Locator Transmitter IH2 12 3 Testing Locator Transmitler oenianerrnnniiennranenes IH3 12 4 Inadvertent ACUVALON vuuveutinernnnne et e e isiaraanraenrnns IH4 12 5 Autoflight General e...

Page 684: ...unting bracket and remove the transmitter from the airplane c Remove and keep the four screws securing the cransmicter s piain end cap Caretullv remove the end cap trving not to damage the seaiant t C...

Page 685: ...If the aircrafr is nor fitted with 2 communicatons receiver request the tower to listen for vour test c Remove the ON ARM OFF switch guard from the switch and set the ON ARM OFF switch to ON Keep the...

Page 686: ...all the access plate The Transmirter is now ready for normal flight openation See NOTE ELECTRONICS NOTE As 3 routine precaution it is recomumended that the transmitter be replaced at the carliest oppo...

Page 687: ...ANTENRA COMKECTION L F SENSE ANTENNA CONNECTION ELY ANTENNA CONNECTION MARKER DEACON ANTENNA CONNECTION P TRANSPONDER ANTENNA CONNECTION GLIDE SLOPE ARTENNA CONNECTION ADF ANTEWNA connEcTION DME ANTEN...

Page 688: ...manufacturers to obtain service direction parts support and service literature Bendix Avionics Division Collins General Aviation Division 2100 N W 62nd Street Rockwell International Fort Lauderdale F...

Page 689: ...correctly identify the AutoPilot system by faceplate model name in order to consult the appropriate service manual Each manual identifies the revision level and revision status as called out on the Ma...

Page 690: ...3H8 3H8 THRU 3L24 INTENTIONALLY LEFT BLANK...

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