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Piper Pawnee Brave, Service Manual

The Piper Pawnee Brave Service Manual is a comprehensive guide for all maintenance and repairs. Easily download the manual for free from our website, ensuring you have the necessary information to keep your aircraft in top condition. Get your hands on this essential resource today to keep your Piper Pawnee Brave flying smoothly.

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Summary of Contents for Pawnee Brave

Page 1: ...PAWNEE BRAVE SERVICE MANUAL CARD 1OF2 PA 36 285 300 375 PIPER AIRCRAFT CORPORATION PART NUMBER 761 471 lAl...

Page 2: ...paragraph titlesand appropriate Grid location numbersis givenat thebeginning of each Chapter relating to the information within that Chapter 5 Identificationof Revised Material Revisedtext and illustr...

Page 3: ...PIPER PAWNEE SERVICE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK 1A3...

Page 4: ...ONTROLS 1F4 VI HYDRAULIC SYSTEM 1 G3 VII LANDING GEAR AND BRAKE SYSTEM 1G11 VIII POWER PLANT CONTINENTAL 1H10 VIIIA POWER PLANT LYCOMING 1K4 AEROFICHE CARD NO 2 VIIIB POWER PLANT LYCOMING 375 2A9 IX F...

Page 5: ...tion Windshield and Window Installation Cockpit Door Installation Wire Deflector Installation Skin Thickness and Material Fuselage Frame Subassemblies Fuselage Frame Tubing Control Stick Installation...

Page 6: ...ntered in Timing Window 4 J4 8 19 Timing Mark on Rotor Aligned with Pointer Right Hand Rotation 1 IJ6 8 20 Timing Light Connected to Magneto 8 21 Timing Light Connected to Magneto and Breakers IJ6 8 2...

Page 7: ...Spark Plug Frozen to Bushing Engine Cowling Installation Propeller Installation PA 36 375 Propeller Blade Minor Repair Propeller Governor Engine Installation Lycoming Engine Control Console Schematic...

Page 8: ...Instrument Panel Electrical Switches 2F3 11 2 Deleted 11 3 Exploded View of Alternator 5 11 4 Removal of Rectifier 2F16 11 5 Removal of Slip Ring End Bearing 2F16 11 6 Removal of Drive End Head From...

Page 9: ...er Installation 38 Cubic Foot 14 2a Hopper Installation 38 Cubic Foot 2J 14 3 Hopper Bedding Tube Installation 2J4 14 4 Wind Driven Liquid Dispersal System 25 14 4a Hydraulic Driven Liquid Dispersal S...

Page 10: ...System Pressure and Fuel Flow Values Troubleshooting Chart Engine Propeller Specifications Coupling Torques Engine Troubleshooting Chart Propeller Specifications Coupling Torques Troubleshooting Char...

Page 11: ...cription 1A12 1 4 Fuselage IA12 1 5 Wing 1A12 1 6 Empennage 1A13 1 7 Flight Controls 1A13 1 8 Landing Gear 1A13 1 9 Engineand Propeller IA13 1 10 Fuel System 1A13 1 11 Instruments 1A13 1 12 Electrical...

Page 12: ...E The fuselagestructure is heli arcwelded4130steeltubing externallycorrosion proofed by a urethane process Quickremovablemetalpanelsare locatedon both sidesfromfirewalltotailfor easyaccess and cleanin...

Page 13: ...fety foam Safom is installed in the inboard bay of each wing The tanks haveindividualfillers and are interconnected with a small spar mounted header tank which operates as a single tank system with an...

Page 14: ...and Lifting 2 16 Leveling 2 17 Weighing 2 18 Servicing 2 19 General 2 20 Fuel System 2 21 Servicing Fuel System 2 22 Filling Fuel System 2 23 Draining Moisture From Fuel System 2 24 Draining Fuel Sys...

Page 15: ...aning Windshield and Windows ICI 1 2 55 Cleaning Precautions C 12 2 56 Exterior Cleaning 1C12 2 57 Interior Cleaning C13 2 58 Cleaning Wheels 1C13 2 59 Repainting 1C13 2 60 Scratch Touch up on Aluminu...

Page 16: ...Station 0 of the wingsis the intersection of BL 19 5 and fuselage STA 150 00 Station 0 of the elevatoris BLO or the centerline of the aircraft The vertical fin and rudder are referenced by fuselageWL...

Page 17: ...PAWNEEBRAVESERVICEMANUAL 2400 2432 2431 0 Figure 2 1 Three View of PA 36 285 1A17 HANDLINGAND SERVICING Issued 2 14 75...

Page 18: ...AWNEEBRAVESERVICEMANUAL 2 30 INCIDENCE AT W S 10 100 0 30 INCIDENCE AT WS 197 300 WING CHORD PLANE nI L JI I A i Figure 2 la Three View of PA 36 300 and PA 36 375 Revised 1 19 78 1A18 HANDLING AND SER...

Page 19: ...016 002 in 016 004 in 016 004 in 19 015 to 019 in 14 5 2 3 6 MHP4004 ANG 6401 Neg Ground 60 Amp VSF 7403 S Neg Ground PROPELLER Manufacturer Type Hub Model Blade Model Diameter Diameter Minimum Blade...

Page 20: ...es 20 BTC 0 018 0 006 in 017 to 021 in 2 1 4 5 2 3 6 MHB4001 ALU 8403 70 Amp PROPELLER STANDARD Manufacturer Type Hub Model Blade Model Diameter Diameter Minimum Blade Angle Low Pitch 3 Blade Angle Hi...

Page 21: ...olite PROPELLER Manufacturer Type Hub Model Blade Model Diameter Diameter Blade Angle Low Pitch 3 Blade Angle High Pitch 3 Governor Control Governor Model Lycoming 10 720 D1CD 375 2500 RPM 17 qts 100...

Page 22: ...9 4 ft Full Swiveling 24 ft Cleveland40 101 Scott Aviation Corp 3450 21 Cleveland30 67B 10 x 3 5 x 4 4 ply rating 8 50 x 10 6 ply rating 28 32 psi 35 45 psi WEIGHTS GrossWeight Normal GrossWeight Rest...

Page 23: ...Vertical Stabilizer Fin Area Rudder Area Total Vertical Area Fin and Rudder 21 6 sq ft 25 0 sq ft 226 sq ft 22 67 sq ft 20 66 sq ft 43 3 sq ft 10 2 sq ft 9 7 sq ft 19 9 sq ft CONTROLSURFACETRAVELS Ai...

Page 24: ...PAWNEEBRAVESERVICEMANUAL 2392 ST PA 36 300 2412 Figure2 2 Station Reference Lines Revised 9 1 78 1A24 HANDLINGANDSERVICING...

Page 25: ...AND LEFT LINES WIRES CABLES CONTROLCONSOLE LEFTSIDE 11 CLEANING AND INSPECTION SHOULDER HARNESS INERTIAREEL ELEVATORPUSH PULL ROD RUDDER CABLES ELEVATORTRIM CABLES 12 CLEANING AND INPSECTION ELEVATOR...

Page 26: ...6 7 8 1011 12 PAWNEE BRAVE SERVICE MANUAL 2388 14 17 18 I 15 16 I Figure 2 3 Access Plates and Panels cont Revised 1 19 78 1B2 HANDLING AND SERVICING...

Page 27: ...re for Converting Inches to Millimeters Refer to Table II II A Example Convert 1 5 inches to millimeters 1 Read down inches column to 1 inches 2 Read across top inch column to 0 5 3 Read down and acro...

Page 28: ...780 0 8 20 320 0 9 22 860 0 001 0 025 0 279 0 533 0 787 1 041 1 295 1 549 1 803 2 057 2 311 0 01 0 254 2 794 5 334 7 874 10 414 12 954 15 494 18 034 20 574 23 114 0 002 0 003 0 004 MILLIMETER 0 050 0...

Page 29: ...6 04 68 58 78 74 81 28 83 82 86 36 88 90 91 44 93 98 104 14 106 68 109 22 111 76 114 30 116 84 119 38 1 54 132 08 134 62 137 16 139 70 142 24 144 78 1 94 157 48 160 02 162 56 165 10 167 64 170 18 180...

Page 30: ...100 110 120 130 140 150 160 170 180 94 0 76 0 58 0 40 0 22 0 4 0 14 0 32 0 50 0 68 0 86 0 104 0 122 0 140 0 158 0 176 0 194 0 212 0 230 0 248 0 266 0 284 0 302 0 320 0 338 0 356 0 104 44 110 00 115 5...

Page 31: ...KW HR DRAM CU CM CU IN U S GAL LITERS CU IN CU FT U S GAL UQ LITERS CU IN CU FT UTERS IMPERIAL GAL FLUIDOZ CM FT FT FT LB MULTIPLY KILOGRAMS LITERS METERS METER KILOGRAM OUNCES AVDP OUNCES FLUID LB AV...

Page 32: ...0 358 S 0 346 11 32 0 3437 R 0 339 9 1262 9 1281 8 7884 8 7300 8 6106 13 64 0 2031 7 0 201 8 0 199 9 0 196 10 0 1935 5 1594 5 1054 5 0546 4 9784 4 9149 35 0 110 7 64 0 1093 36 0 1065 37 0 104 38 0 10...

Page 33: ...23 25 1 2 27 1 2 30 TABLE II IV HOSE CLAMP TIGHTENING INITIAL INSTALLATION Types of clamps Types of hose Self sealing All other hose Worm screw type Finger tight plus 2 complete turns Finger tight plu...

Page 34: ...OSE WHITE RED NUMERALS AND LETTERS C FLAME AROMATIC AND OIL RESISTANT HOSE HOSE IDENTIFICATION BROWN ORANGE ORANGE ORANGE GRAY ELECTRICAL COMPRESSED INSTRUMENT MARKINGS BLUE YELLOW GREEN BREATHING OXY...

Page 35: ...ening operation Any instructions furnished by the manufacturer must be followed explicitly When it is necessary to use a special extension or adapter wrench together with a torque wrench a simple math...

Page 36: ...uld be covered as well When it is ascertained that the propeller back blast and taxi areas are clear apply power to start the taxi roll and perform the following checks a Taxi forward a few feet and a...

Page 37: ...handle out CAUTION Care should be taken when setting brakes that are overheated or during cold weather when accumulated moisture may freeze the brakes If the aircraft is to beparked for any length of...

Page 38: ...dirt grease moisture foreign items such as rags and tools from the airplane before weighing c Defuel airplane then open all fuel drains until all remaining fuel is drained Operate engine until all und...

Page 39: ...surface andcheck friction dragtorque required to turnthe nut 4 Add the friction drag torque to the desiredtorque recommended by the manufacturer or obtaindesired torque asshownin TableII V Thisis ref...

Page 40: ...ut bolt Torque Limits Torque Limits size in lbs in lbs Torque Limits in lbs Torque Limits in lbs Torque Limits Torque Limits in lbs in lbs Min Max Min Max NOTE BOLTAND NUT 8 36 10 32 1 4 28 5 16 24 3...

Page 41: ...INCHES TORQUE INCH POUND ALUMINUM ALLOY TUBING FLARE AND 10061 OR AND 10078 STEEL TUBING FLARE AND 10061 HOSE END FITTING AND HOSE ASSEMBLIES MINIMUMMAXIMUM MINIMUM MAXIMUM MINIMUM MAXIMUM 2389 2391 4...

Page 42: ...PAWNEEBRAVE SERVICEMANUAL C724 BOTTOM DOOR CHANNEL LATERALLY LONGITUDINALLY Figure 2 6a Leveling 2391 I Figure 2 6b Weighing Arrangement Revised 9 1 78 HANDLINGAND SERVICING 1B18...

Page 43: ...age often during the initial takeoff phase of a flight Piper Aircraft has issued a Service Bulletin No 797B Fuel Port Restrictor Installation which provides fuel port restrictors and instructions in t...

Page 44: ...5 OILFILLERENGINE LYCOMING 5 BRAKE CYLINDER RESERVOIR L R 16 FILTERS INDUCTION AIR LYCOMING 6 STATIC PORTS L R 17 PITOT DRAIN 7 TIRE TAIL 18 HYDRAULIC FLUIDFILTER 8 PITOT HEAD 19 HYDRAULIC RESERVOIR 9...

Page 45: ...ructions for filling each reservoir are found in Paragraph 2 27 There are two brake master cylinders one on each rudder pedal Each master cylinder has its own self contained reservoirwith a filler scr...

Page 46: ...nside of the tire with toluol Apply a coat of patch cement to both the patch and the inside center of the tire in line with the chalk marks When the cement has dried install the patches making certain...

Page 47: ...painted when necessarywith a flat black paint to retard glare To preventcorrosion wipesurfaceswith a light oil or wax In addition the propellershould be inspected for greaseor oil leakageand freedom o...

Page 48: ...to neutralize electrolyte or corrosion then flush thoroughly with clean water CAUTION Do not allowsoda water solution to enter battery Clean cableand terminal connections with a wirebrush and coat wit...

Page 49: ...er 240 DRAINING OIL SUMP AND OIL COOLER If the engine is cold run it until the oil temperature reaches the green arc as indicated on the gauge on the instrument panel Open the engine cowl on the left...

Page 50: ...the lower set of spark plugs b Ascertain that 12 U S quarts of engineoil have been added to the enginesump if the system was completely drained c Position the mixture control in IDLE CUT OFF and magn...

Page 51: ...ass valve installedmust use the Gold Continental P N 641584 type filter only The goldfilter has the bypassvalvedesignedinto it c Before installingthe new filter lubricate the gasket on the filter with...

Page 52: ...eing monitored 245 LUBRICATION AIRFRAME 246 LUBRICATIONINSTRUCTIONS Proper lubrication procedures are of immeasurablevalue both as a means of prolonging the servicelife of the airplane and as a means...

Page 53: ...xcess b Remove wheel bearings from the wheel hub and clean thoroughly with a suitable solvent When repacking with grease be sure the lubricant enters the space between the rollers in the retainer ring...

Page 54: ...the solvent or a mixture of solvent and degreaseroverthe entire engine CAUTION Particular care should be taken so as to prevent solvent from entering starter alternator air intake and alternate air i...

Page 55: ...I OR EQUIVALENT SPECIALINSTRUCTIONS 1 LUBRICATION POINTS WIPE ALL LUBRICATION POINTS CLEAN OF OLD GREASE OIL DIRT ETC BEFORE LUBRICATING WIPE OFF EXCESSAFTER LUBRICATING 2 BEARINGS AND BUSHINGS CLEAN...

Page 56: ...EAN AT REGULAR INTERVALS BUT DONOTLUBRICATE 4 MISCELLANEOUS DURING ROUTINE MAINTENANCE CHECKS LUBRICATE COWLHINGESAND LATCHES FORWARDSIDEPANEL HINGESANDMISCELLANEOUS LINKAGES EXAMPLE METHODOF LUBRICAT...

Page 57: ...CONSOLE CONTROL LEVERS 24 MASTER CYLINDERBEARINGS 9 AILERONBELLCRANKS ROD ENDS LEFT 25 RUDDERCABLE ADJUSTER BEARINGS RIGHT 26 FLAP ACTUATORATTACH BEARINGS 10 AILERON HINGE BEARINGS 27 FLAP ACTUATORGEA...

Page 58: ...2399 PAWNEE BRAVE SERVICEMANUAL SKETCH B SKETCHC Figure2 9 Lubrication Chart cont Revised 9 1 78 HANDLINGAND SERVICING 1C10...

Page 59: ...a straight rubbing motion Do not harshly rub surfaces Rubber glovesshould be used to protect hands from any chemicalsor dust that may have been on the windshield Rinsethe windowsthoroughly c Remove oi...

Page 60: ...the hazard inhandling d Be sure to have a convenient place close by having a good supply of fresh water and plenty of soap Washoften and avoid scratching or placinghands near eyes nose ears or mouth S...

Page 61: ...all pilot s seat 2 58 CLEANING WHEELS The landing gear and wheels should be washed frequently and examined for cracks or dents in the wheel casting chipped paint and corrosion in small tight corners C...

Page 62: ...over V 48 without an inter mediate primer a Agitate the primer well b Slowly add 1volume of catalyst while stirring to 4 volumes of Primer DO NOT REVERSE THIS PROCEDURE c Reduce the above mixture wit...

Page 63: ...al is 6 8 hours at 75 F Allow to dry overnight before light sanding and recoating with Polytane Enamel TABLE II IX PAINT MATERIALS Piper Part No Titanine No Description 170 139 170 729 170 825 170 735...

Page 64: ...ekunder normal climateconditions and if periodic running to circulatethe oil will not be carried out prepare the aircraft as follows a PreparationFor Storage 1 Operate the engine until the oil tempera...

Page 65: ...s from formingon the tires If this isimpractical the wheelsshould be rotated every30 days 4 Lubricate all airframeitems and sealor cover all openingsthat would allow moisture and or foreign material t...

Page 66: ...med at the specific intervals indicated using the specified oils a Preparation For Storage 1 Drain 3 quarts of engine lubricating oil from the engine crankcase and add 3 quarts of corrosion preventive...

Page 67: ...moisture into the sealed area 14 Attach a warning note on the throttle control handle stating the engine contains preservative oil Place a tag on the propeller also with the notation DO NOT TURN PROPE...

Page 68: ...r sooner under unfavorable operatingconditions During oil changes the oil suction screen should be removedand cleaned the oil filter cartridgechangedand the oil cooler drained Engine oil and filter sh...

Page 69: ...s In new or newly overhauled engines some small particles of metallic shavingsmight be found these are generally of no consequenceand should not be confused with particles produced by impacting abrasi...

Page 70: ...ENGINE ONLY NOMENCLATURE SealInstaller ValveSpringCompressor Adapter CompressionCheck Crankshaft SealInstaller Prop Shaft TurningTool Piston RingCompressor Cylinder Headnut Wrench Exhaust FlangeNut W...

Page 71: ...Inspection Requirements 3 5 Preflight Check 3 6 Overlimits Inspection 3 7 Special Inspection 3 8 Inspection of Exhaust System 3 9 Inspection of Exhaust System PA 36 300 3 10 Inspection of Exhaust Sys...

Page 72: ...ch group lists the inspection or procedure to be performed The second column is dividedinto four columns indicating the required inspection intervals of 50 hours 100 hours 500 hours and 1000 hours Eac...

Page 73: ...rating time or airframe inspection intervals Typicalof thistype are a Inspection is necessary because of special conditions or incidents that arise requiring an immediate inspectionto insure further s...

Page 74: ...oud Remove bolt from hanger at right front of engine Remove the three bolts from the hanger clamp at the aft end of the muffler assembly Remove the boltsjoining the muffler and exhaust stack With this...

Page 75: ...assembly from the exhaust stack Remove the left and right exhaust stacks from the engine by removing the nuts from the exhaust port flanges Remove the exhaust stack and flanges by slipping off the st...

Page 76: ...reach the variousrod end bearings b Disconnect the control rod by removing the attaching hardward from the rod end bearing Note for location of washersto facilitate reassemblyand installation c Inspec...

Page 77: ...PAWNEEBRAVESERVICEMANUAL A67P INSPECT AND LUBRICATE ALL ROD END BEARINGS IN ACCORDANCE WITH INSTRUCTIONS GIVEN IN PARAGRAPH 3 11 Figure 3 4 Inspection of Rod End Bearings Added 9 1 78 INSPECTION 1D5...

Page 78: ...0 0 O 0 0 O 0 0 O O 0 O 0 0 O 0 0 O 0 0 0 0 O B ENGINE GROUP CONTINENTAL WARNING Read Note 6 before completing this inspection group CAUTION Ground Magneto Primary Circuit before working on engine 1 R...

Page 79: ...leaks and clamps for tightness 24 Remove drain and clean fuel strainer bowl and screen Drain and clean at least every 90 days 25 Inspect condition of flexible fuel and oil lines See Note 9 26 Replace...

Page 80: ...imary Circuit before working on engine 1 Remove engine cowl and inspect for damage 2 Clean and inspect cowling for cracks distortion and loose or missingfasteners 3 Drain oil sump and oil cooler 4 Cle...

Page 81: ...overs for evidence of oil leaks If found replace gasket torque cover screws 50 inch pounds See Note 13 NOTE Lycoming requires a Valve Inspection be made after every 400 hours of operation See Note 13...

Page 82: ...Section XI of Service Manual 44 Inspect condition of alternator and starter 45 Inspect security of alternator mounting 46 Lubricate all controls Refer to Service Manual 47 Overhaul or replacepropeller...

Page 83: ...in landing gear attachment bolts and nuts for safety 2 Jack airplane inspect gear bolts for looseness Replace as required 3 Remove gear pads inspect springs in clamp area and landing gear spring for c...

Page 84: ...el valve 18 Inspect condition of heater controls and ducts 19 Inspect parking brake and operation 20 Inspect brake cylinders for leaks and fluid level 21 Inspect for any loose distorted or missing par...

Page 85: ...an fuselage 8 Inspect sprayer pump mount assembly 9 Check operation of dump valve 10 Check agitator operation 11 Inspect hopper tank for leaks 12 Inspect spray boom attachments 13 Inspect spray nozzle...

Page 86: ...k engine idle 12 Check propeller governor action 13 Check manifold pressure Inspection Time hrs 50 100 500 1000 0 0 0 0 0 0 0 0 O 0 0 O 0 0 O 0 0 O 0 0 O 0 0 O O 0 O 0 0 O 0 0 J GENERAL 1 Aircraft con...

Page 87: ...period or Continental Service Bulletin No M74 20 for recommended engine overhaul period 8 Refer to latest revision of Continental Service Bulletin M76 5 9 Replace flexible oil lines at Engine TBO per...

Page 88: ...bearings 20 Examine cable for broken strands by wiping the cable with a cloth along the length of the cable Visually inspect the cable thoroughly for damage not detected by the cloth Replace damaged...

Page 89: ...l of Flap 4 15 Installation of Flap 4 16 Wing 4 17 Removal of Wing 4 18 Installation of Wing 4 19 Empennage Group 4 20 Elevator 4 21 Removal of Elevator 4 22 Installation of Elevator 4 23 Elevator Tri...

Page 90: ...1 Removal of Seat 4 52 Installation of Seat 4 53 Adjustment of Seat Safety Provisions 4 55 Safety Belts 4 56 Shoulder Harness 4 57 Wire Deflector and Cable Deflector 4 58 Removal and Installation of...

Page 91: ...d of aluminum The remainder of the wing is of stressed aluminum skin panels Installed in each wing isa rubber fuel cell with a capacity of 44 5 U S gallons Each wing has a two bolt main spar attachmen...

Page 92: ...ar Assembly Piper Part No 97701 00 Rev N and 97701 01 Rev N Refer to Piper Service Bulletin No 744 a Replace the upper and lower spar cap assemblies with Piper spar cap replacement kits Part Numbers 7...

Page 93: ...est of the screwsalongthe top and bottom edgesand at each end and tighten d SeeParagraph11 75afor adjustment of the lift detector 4 10 AILERON 4 11 REMOVALOFAILERON Refer to Figure4 1 a Disconnect the...

Page 94: ...d at the wing root area it is recommended that the fittings and plugs be marked or labeled to insure and facilitate proper reconnection c Disconnect fuellines and vent line at wingroot and cap open en...

Page 95: ...C416L 2 REQ NUT MS20365 42C I REQ L R SKETCHD PAWNEE BRAVE SERVICE MANUAL C710 C711 C713 2 REQ BOLT AN4 IOA WASHER AN960 C416 2 REQ NUT MS20365 428C I REQ L R V SKETCHF Figure 4 1 Aileron and Flap Ins...

Page 96: ...4 REQL R BOLT AN4 11A WASHER AN960 416 NUT MS20365 42 1 REQ L R FLAP SKETCH A BOLT AN3 10A WASHER AN960 10L NUT MS20365 1032C I REQ L R WASHER AN960 10 2 REQ L R A A SKETCHC Figure 4 1 Aileron and Fl...

Page 97: ...NUAL BOLTAN5 C6A AN5 C7A TORQUE 130 140 IN LBS WASHER AN960 C516 2 REQ NUT MS20365 524C 1 REQ L R REQUIRED ON PA 36 285 S N 36 7560056 ND UP AND ALLS N S OF MODELS 36 300 AND 36 375 SKETCHA A701 BOLTA...

Page 98: ...ON AND REMOVAL TOOL PAC 76811 0 SEE NOTE BOLTAN5 C6 AN5 C7A TORQUE 130 140 IN LBS WASHER AN960 C516 NUT MS20365 524C 1 REQ L R BOLT ASSEMBLY 77245 0 C715 REQUIRED ON PA 36 285 S N 36 7560056 AND UP AN...

Page 99: ......

Page 100: ...REQ...

Page 101: ...ER AN970 4 WASHER AN960 416 AS REQ WASHER AN960 416L NUT AN310 4 COTTER PIN MS24665 153 SKETCHD A697 WASHER AN960 416L 2 REQ BOLT AN34A SKETCH G Figure 4 3 Empennage Installation cont Revised 12 10 79...

Page 102: ...6A WASHER AN960 10 NUT MS20365 1032C 4 REQ BOLT AN3 4A WASHER AN96 NUT MS20365 1 2 REQ BOLT AN5 IOA WASHER AN960 516 WASHER AN960 616 NUT MS20365 524C NUT MS20365 624C 1 REQ 4 REQ SKETCHJ STUD PIPER...

Page 103: ...ed in proper order with each segment stagged so the gap is not in line with the other ones Refer to Figure 4 2 Detail B Next screw the installation tool Piper Part No 76811 0 or Tool No IT 12 from Adj...

Page 104: ...edwhen the nut is removed The stud may be removed however after the elevator is removed by unscrewingit f Remove the elevator surface by slidingoutward away from the fuselage 4 22 INSTALLATION OF ELEV...

Page 105: ...Figure4 3 a Disconnect the elevator trim control rod at the trim tab by removing the nut washers and bolt from the control rod endbearingand let it hang free b Removethe trim tab hinge pins by cutting...

Page 106: ...strut was removed install it with bolt washer and nut and attach the upper end to the eye bolt on the stabilizer with the bolt washer and nut Refer to Figure 4 3 c Connect elevator trim tab control ro...

Page 107: ...h bolt washer and nut d Swing the windshield wire deflector bar down to tighten the deflector cable and attach the bottom of the deflectorbar to itsmount on top thecowlwiththe bolt washer andnut Tight...

Page 108: ...135 017 24A WASHER AN960 L NUT PS10062 4 5 10 REQ L 10 REQ R SCREW MS24694 C53 WASHER TINN A3235020 27 NUT PS100624 9 6 REQ L 6 REQ R A667 A666 SCREW MS24694 C52 WASHER TINN A3235 020 27 WASHER AN960...

Page 109: ...y damaged should be replaced However certain repairs may be made successfully without removing the window from the aircraft There are three types of temporary repairs that may be used for cracked plas...

Page 110: ...or aircraft fabric as a cushion between the wood and plastic then inserting smallbolts through the wood and plastic c A temporary repair may be made to a curvedsurface by placingfabric patches over t...

Page 111: ...OUTER LEFT 13 PIN HINGE 4 ROLL PIN 14 HANDLE ASSEMBLY LOWER INNER 5 WINDOW ASSEMBLY COCKPIT DOOR LEFT 11 BALL 6 SEAL WINDOW 16 SKIN OUTER 7 SCREW ASSEMBLY 17 HINGE LEFT FORWARD 8 BUSHING 11 HANDLE EM...

Page 112: ...ent hardware should also be replaced if excessively worn The belts may be removed by removing the bolt that attaches the belt to the cable thimble at the panel behind the seat Replaceattaching cablesi...

Page 113: ...SPRING 2 SPRING LEFT MAIN GEAR 3 BRAKE LINE 4 HOPPER 5 WIRE DEFLECTOR HOPPER TO CANOPY 6 WINDSHIELD 7 WIRE DEFLECTOR HOPPER TOCANOPY 8 PLATE 2 REQ 9 CABLE ASSEMBLY WIRE DEFLECTOR 10 CANOPY 11 CABLE A...

Page 114: ...MS20365 1032C NOTE INSTALL IN HOLE POSITION THAT IS CLOSEST TO NOMINAL CABLE LENGTH BOLT MS27039C1 14 WASHER AN960 C10 3REQ NUT MS2036S 1032C BOLT AN4C7A WASHER AN960 C416L 2 REQ NUT MS20369 428C SKE...

Page 115: ...2397 SEE NOTE3 2 3 8 OR9 8 OR 9 SEE NOTE3 PAWNEE BRAVE SERVICE MANUAL 8 3 2 3 3 8 5 Revised 10 27 82 1E19...

Page 116: ...T 4 FWD CANOPY 5 AFT FUSELAGE 6 AFT FUSELAGE AFT CANOPY 7 AFT FUSELAGE LEFT RIGHT SIDE 8 TAIL WHEEL SUPPORT NOTE FOR REPAIR WORK THE ABOVE ARE AVAILABLE AS ASSEMBLIES REFER TO THE LATEST ISSUE OF THEP...

Page 117: ...6 VIEW A MATERIAL NUMBER TUBE DIAMETER WALL THICKNESS PIPER SPECIFICATION NUMBER MATERIAL TUBE DIAMETER WALL THICKNESS PIPER SPECIFICATION I NUMBER TUBE DIAMETER WALL THICKNESS MATERIAL PIPER SPECIFIC...

Page 118: ...flector attachment screw and the deflector bar is then free To replace the deflector bar attach the deflector bar to its upper and lower mounts by installing the bolts alone Also attach the wire defle...

Page 119: ...las cloth A repair kit part number 756729will furnish necessary material for such repairs and is available through Piper Aircraft Dealers NOTE Very carefully follow resin and catalyst mixing instructi...

Page 120: ...the hole This roughens the surface for strong bond with patch e Cover a piece of cardboard or metal with cellophane Tape it to the outside of the structure covering the hole completely The cellophane...

Page 121: ...LK REPAIR 4 64 SURFACE PREPARATION FOR PRESSURE SENSITIVE SAFETY WALK The areas to which the pressure sensitive safety walk is to be installed must be free from all contaminates and no moisture presen...

Page 122: ...PAWNEE BRAVE SERVICE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK 1F3...

Page 123: ...ols 1F13 5 16 Installation and Rigging of Elevator Trim Controls 13 5 17 Rudder Controls IF16 5 18 Removal of Rudder Control Cable Assemblies IF16 5 19 Installation of Rudder Control Cable Assemblies...

Page 124: ...evator is operated by a seriesof push pullrods connected from the bottom of the control stick below its pivot point backto the elevatorhorn As the stick is moved fore and aft the push pullrods move th...

Page 125: ...es 2 Be sure to install the proper number of shim washers in the proper locations Tighten front hinge bolt and nut on the rear hinge stud c Slide the boot down over the control stick horn and attach t...

Page 126: ...rol stick torque tube 1 and the inboard aileron bellcranks 4 Alsoremove the push pull rods 20 that connect the ailerons to the outboard bellcranks c 9 and d e Loosen the two turnbuckles 1 in each wing...

Page 127: ...NTROL STICK STOP 19 TORQUETUBE STOP PAWNEEBRAVESERVICEMANUAL MAXIMUM OF 03 INCH GAP A675 MAXIMUM ALLOWABLE GAP BOTH SIDES 2427 SKETCHB NOTES 1 AN960 416 416L WASHERS BETWEEN BEARING AND TORQUE TUBE AS...

Page 128: ...s with Flap Assemblies 97047 02 03 installed FULL DOWN TRAVEL A 20 1 Airolnes Serial Nos 36 7360001 to 146004 1 incl and PA 36 3 75 B 30 I All PA 36 285 and 300 From Serial No 36 7560001 and up Ca Rev...

Page 129: ...3 BOLT ASSEMBLY 14 BOLT ASSEMBLY STOP 15 ROD END 16 BOLT ASSEMBLY 17 BELLCRANK ASSEMBLY OUTBOARD I BOLT ASSEMBLY 19 ROD END 20 ROD ASSEMBLY OUTBOARD 21 SCREW ASSEMBLY 22 BRACKET AILERON HINGE 23 AILER...

Page 130: ...llcranks f With the control stick lock engaged adjust the length of the control rods connecting the inboard aileron bellcranks and control stick bellcrank until the attachment bolts can be installed w...

Page 131: ...EMBLY RIGHT 16 YOKE ASSEMBLY 17 STOP NUT 1 ELEVATOR TORQUE TUBE 19 ELEVATOR HORN 20 ROD ASSEMBLY ELEVATOR TRIM L R 21 ELEVATOR TRIM TAB RIGHT 22 ELEVATOR TRIM TAB LEFT 23 BARREL 24 BRACKET OLD 25 SCRE...

Page 132: ...lations Serial Nos 36 7360001 to 36 7460039 inclusive remove the stop nut 17 from the screw shaft 25 and slide the barrel 23 off the screw shaft Removethe barrel and cables from the aircraft The yoke...

Page 133: ...allthe clamps 29 Do not tighten the clamps at this time 6 Push bracket assembly 28 tight against the screw shaft to prevent end play then tighten clamps 27 to 40 5 inch pounds d Install the pulley clu...

Page 134: ...ABLE ASSEMBLY RIGHT 5 BOLT ASSEMBLY 6 PULLEY 7 PEDAL ASSEMBLY LEFT 8 ARM ASSEMBLY LEFT 9 CABLE ASSEMBLY LEFT 10 SHACKLE 11 RUDDER HORN 12 RUDDER ASSEMBLY 13 ADJUSTER ASSEMBLY 14 BOLT ASSEMBLY 15 BOLT...

Page 135: ...and out of the fuselage 5 19 INSTALLATIONOF RUDDERCONTROLCABLEASSEMBLIES Refer to Figure 54 a Attach the cableadjuster assemblies 13 to the rudder pedals b With the fuselage side panels removed route...

Page 136: ...shims collars 22 and bolt assemblies 23 d Connect the rudder pedal return springs 8 to the pedal assemblies e Connect the cableadjuster assemblies 12 and 19 to the mounts on the rudder pedalswith bolt...

Page 137: ...EFT 10 ROD END BEARING LEFT 11 BOLT ASSEMBLY 12 ROD ASSEMBLY LEFT 13 ACTUATOR ASSEMBLY FLAP LIMIT SWITCH 14 SAFETY WIRE 15 FLAP LIMITSWITCH 16 FUSELAGE FRAME SKETCHC 17 ROD END BEARING RIGHT 18 BELLCR...

Page 138: ...op when actuating mechanism reaches its full up or down travel therefore the motor must be shut off at the cockpit switch e With the flapsstill disconnected from the actuator ascertain that the flaps...

Page 139: ...e position placard and secure the end of the cable on the torque tube fitting Run the flapsdown to the full down position refer to TableV I and verify the indicator alignment with the DOWNmark on the...

Page 140: ...in inch poundsfrom the centerlineof the control surfacehinges One suitabletool configuration is shown in Figure 5 8 5 31 BALANCING CONTROL SURFACES a Insure that the control surface is in its final f...

Page 141: ...in the levelhas been centered Since the moveable weight weighs three pounds every inch it is moved from the center of the beam equals three inch pounds of force 5 32 CONDITIONS OF SURFACE REQUIRING RE...

Page 142: ...MBALANCING BOLT USEDFOR BALANCING THE TOOLITSELFONCE THETRAILING EDGESUPPORT HAS BEENSET NUTSANDOR WASHERS ADDED AS REQUIRED TO BALANCE TOOLITSELF HINGELINE OFCONTROL SURFACE BUBBLELEVEL EW VERTICALLY...

Page 143: ...E POINTS DIRECTLY OVER HINGE CENTERLINE ELEVATOR BALANCE WEIGHT 9 MAX 0 RUDDER AND ELEVATOR BALANCE CONFIGURATION 2429 LOCATE BALANCE TOOL ON AILERON AS ILLUSTRATED ABOVE AILERON BALANCE CONFIGURATION...

Page 144: ...120 110 PAWNEE BRAVESERVICE MANUAL TABLEV III CABLETENSIONVS AMBIENTTEMPERATURE A691 I I LL w w w 100 90 80 60 50 40 30 20 1G1 SURFACECONTROLS Added 10 12 73...

Page 145: ...TORQUE TUBE ALIGNMENT 54 PAWNEEBRAVESERVICEMANUAL FITTING ON FUSELAGE FRAME 15 MATERIAL 032 ALUMINUM Figure5 10 Flap RiggingTool SURFACECONTROLS Added 10 12 73 1G2...

Page 146: ...e operation of the wheel brakes and is part of a related system Removal inspection and repair installation and bleeding procedures may be found in Section VII The other hydraulic system is used in the...

Page 147: ...PAWNEE BRAVE SERVICE MANUAL 1G4THRU 1G10 INTENTIONALLY LEFT BLANK 1G4...

Page 148: ...Inspection of Main Wheel Assembly 7 16 Replacement of Bearing Cups 7 17 Reassembly of Main Wheel Assembly 7 18 Main Wheel Alignment 7 19 Wheel Balancing 7 20 Tail Gear Assembly 7 21 Removal of Tail G...

Page 149: ...ter Cylinder 7 40 Cleaning Inspection and Repair of Brake Master Cylinder 7 41 Assembly of Brake Master Cylinder 7 42 Testing Brake Master Cylinder 7 43 Installation of Brake Master Cylinder 7 44 Park...

Page 150: ...the fairing at the gear strut to fuselage attachment point c Remove the brake bleeder screw and drain the fluid from the gear being removed d Disconnect the brake hose coupling at the wheel and remov...

Page 151: ...AIN WHEEL AND AXLE ASSEMBLY 7 10 REMOVAL OF MAIN WHEEL AND AXLE ASSEMBLY Refer to Figure 7 1 a Disconnect the hydraulic brake line at the wheel and let the fluid drain Cap fittings to protect against...

Page 152: ...E PLATE 13 NUT WHEEL RETAINER 14 BOLT ASSEMBLY NOTE ADD ZINC CHROMATETO THEGRIPAREA OF THE BOLT INSURING NO ZINC CHROMATE CONTACTS THE THREADS OF THE BOLT AND INSTALL WHILE STILL WET 16C 2 SEE NOTE WA...

Page 153: ...G Do not attempt to separate wheel halves without first deflating tire or injury may result a Deflate tire and break loose tire bead taking care to avoid damagingthe wheel flanges b Remove the thru bo...

Page 154: ...C ASSEMBLY 8 BOLT 9 REQ 9 BEARING CONE 10 BEARING CUP 11 SPACER 12 BEARING CUP 13 BEARING CONE 14 GREASE SEAL RETAINER 15 GREASE SEAL FELT 16 GREASE SEAL RETAINER 17 SNAP RING PAWNEEBRAVESERVICEMANUAL...

Page 155: ...e is damagedor destroyed j Prior to reassemblyof wheel assembly thoroughly cleanrepairedsurfacesand areas of the wheel from whichpaint has been removed k Paint the exposedareaswith one coat of primer...

Page 156: ...sually causes wheel unbalance This condition may be corrected by replacing the tire and if the wear is abnormal the landing gear alignment should be checked per Paragraph 7 18 Tire and tube manufactur...

Page 157: ...E AND LET IT TOUCH FABRICATED BLOCK NEGATIVE CAMBER FRONT VIEW OF CAMBER CHECK Camber0 1 at grossweight PLACE FABRICATED BLOCK AGAINST WHEEL FLANGE SEE BELOW ALUMINUM PLATES APPROXIMA 18 SQUARE PLACED...

Page 158: ...G SCALE ATTACHED TO THE STEERING ARM SPRING HOLE DETERMINE IF THE PULLING FORCE IS 3 5 TO 15 POUNDS TO TURN THE TAIL WHEEL d IF THE PULLING FORCE IS NOT WITHIN THE DESIRED LIMITS COMPRESSION SPRINGS M...

Page 159: ...from the aircraft e Removethe valvecore from the valvestem and deflate the tire f Place wheel on a clean flat surface with the valvestem up and break the tire beads freeof both wheel flanges 33 by ap...

Page 160: ...UT 14 WASHER 25 SPINDLE 31 BOLT 4 REQ 15 DUST CAP 26 SPACER 32 NUT SELF LOCKING 4 REQ 16 FORK ASSEMBLY 27 GREASE RETAINER 33 HUB 17 AXLE ASSEMBLY 28 SPACER 34 GASKET 18 LOCK WASHER 29 CONE BEARING 35...

Page 161: ...1 and the arm 9 and also between the fork 16 and arm 9 should be 04 to 024 inches Refer to Note 1 Figure 7 5 i Safety the castle nut 23 with a cotter pin If the hole and nut castellation do not align...

Page 162: ...Y FLEXIBLE MASTER CYLINDER RIGHT VALVE PARKING BRAKE MASTER CYLINDER LEFT KNOB PARKING BRAKE CONTROL ASSEMBLY PARKING BRAKE TUBE ASSEMBLY BRAKE ASSEMBLY HOSE ASSEMBLY FLEXIBLE Figure7 6 Brake System I...

Page 163: ...ue plate NOTE To remove the torque plate the wheeland axle assemblymust be removed Refer to Paragraph7 10 d Removethe pressureplate 7 by slidingit off the anchor bolts of the housing e The pistons 8 m...

Page 164: ...Y 3 BACK PLATE 2 REQ 4 LINING BACK PLATE 2 REQ 5 LINING PRESSURE PLATE 6 RIVETS REQ 7 PRESSURE PLATE 8 PISTON 9 O RING 10 FITTING TUBE 11 WASHER 12 BOLT 13 WASHER 14 NUT IS CYLINDER 16 CAP BLEEDER 12...

Page 165: ...es and areas of the brake assembly from which paint has been removed b Paint exposed areas with one coat of primer and one coat of aluminum lacquer CAUTION Do not paint pistons or the piston bores in...

Page 166: ...t c Removesnap ringand coverplate d Remove lockscrew and washer using a 1 8 inch allen wrench and remove piston and shaft assembly e Removesnap ringto disassemblethe piston from the shaft NOTE Do not...

Page 167: ...y 8 inches 7 42 TESTINGBRAKEMASTERCYLINDER After complete assembly blow air through port hole in cylinder housing and observeair passing out through vent in filler plug This assuresthat valveis openin...

Page 168: ...HING 6 RING SQUARE CUT RUBBER 7 SNAP RING 8 SHAFT 9 THRUST COLLAR 10 PISTON 11 O RING 12 SPRING 13 SNAP RING 14 SCREW AND WASHER ASSEMBLY 15 FILLER PLUG 16 BRAKE HOUSING 17 O RING I8 RETURN SPRING Fig...

Page 169: ...the mounting bracket and securewith bolts b Remove the previouslyinstalled cap plugsand reconnect the hydrauliclinesto the valve c Reconnect the actuating cable to the valvelever with the valvein the...

Page 170: ...the entiresystem for breaksor leaks b Removethe rubber cap from the bleeder fitting on the wheelbrake cylinderhousing c Slide one end of a clean clear hose over the bleeder nozzle and placethe other e...

Page 171: ...9 8 13 Propeller Governor IH20 8 14 Description 1H20 8 15 Removal of Propeller Governor 1H20 8 16 Installation of Propeller Governor IH20 8 17 Propeller Governor Adjustment and Control Rigging 1H21 8...

Page 172: ...Throttle Body Assembly 1I16 8 56 Inspection of Throttle Body Assembly 1116 8 57 Installation of Throttle Body Assembly 1116 8 58 Fuel Manifold Valve 1117 8 59 Removal 11 17 8 60 Removal of Fuel Manif...

Page 173: ...emoval of Spark Plugs J14 8 85 Inspection and Cleaningof Spark Plug 1J18 8 86 Installation of Spark Plugs 1 8 87 Starting Vibrator IJ18 8 88 Starting Vibrator Checking Procedure 1J18 8 89 Removal of S...

Page 174: ...is automatic It is fail safein that during flight the VTC unit is alwaysunlocked This method of reducing torsional vibration replaces the conventional systems with counterweightssuspended on the crank...

Page 175: ...ion that deals with the component 8 3 ENGINECOWLING 84 DESCRIPTION The cowlingcompletelyencloses the engineand consistsof a reinforced plasticlower nose and bottom section a reinforced plastic upper n...

Page 176: ...LY COWL LOWER FORWARD 9 DOOR ASSEMBLY COWL UPPER LEFT 17 SUPPORT ASSEMBLY COWL LOWER AFT 10 STUD 18 SCREW ASSEMBLY COWL ATTACHMENT 11 RETAINER 19 SCREW ASSEMBLY COWLATTACHMENT 12 HOOK ASSEMBLY COWL LA...

Page 177: ...againstthe nuts to allow oil to drain from the propeller and enginecavities 4 Remove the propeller attaching nuts and pull the propeller forward and free from the crankshaft 5 Capengine flangeto prev...

Page 178: ...CHANGE 14 BEARING BLADE SPLIT 15 BLOCK PITCH CHANGE 16 O RING 17 BOLT HEX HEAD 6 REQ 2372 18 BOLT HEX HEAD 4 REQ 19 RING BEARING GUIDE 20 SPLIT RETAINER 21 ROD PISTON 22 BLADE PROPELLER 23 O RING 24 S...

Page 179: ...matter entered the propeller mechanism d Check propeller hub for proper seating of 0 ring Cover O ring with a light film of engine oil e Install rear spinner bulkhead Refer to table VIII I for torque...

Page 180: ...0625 inch may be an indication of bent blades or improper propellerinstallation Checkblade track as follows a With the engine shut down and blades vertical secure to the aircraft a smooth board just...

Page 181: ...and closegovernoroil passagesasrequired to maintain a constant engine speed 8 15 REMOVALOF PROPELLERGOVERNOR Refer to Figure8 4 a Removethe upper engine cowl b Disconnect the control cableend from the...

Page 182: ...en the high RPM fine adjustment screw locknut 5 and turn the screw in a clockwise direction to decrease engine speed or in a counterclockwisedirection to increase engine speed NOTE One revolution of t...

Page 183: ...mum Magnetos Retard Breaker Left Bank Right Bank FiringOrder Spark Plugs Torque Alternator Starter Engine DryWeightwith Accessories 6 285 B2or 6 285 C2 E12C 6 Horizontally Opposed 4 875 3 625 406 Gear...

Page 184: ...reuse any lockwire lockwashers tablocks tabwashers or cotter pins All lockwire and cotter pins must fit snugly in holes drilled in studs and bolts for locking purposes Cotter pins should be installed...

Page 185: ...PAWNEE BRAVE SERVICE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK 1H24...

Page 186: ...LET 12 MANIFOLD PRESSURE LINE 13 FUEL PUMP 14 FUEL PRESSURE LINE 15 THROTTLE CONTROL 16 MAGNETO 17 OIL FILLER 18 OIL COOLER 19 FUEL DISCHARGE NOZZLE 20 SPARK PLUG 21 EXHAUST STACK LEFT 22 STARTER 23 A...

Page 187: ...32 SAFETY WIRE SECURE TO ENGINE MOUNT MS20995 C41 2370 PAWNEEBRAVESERVICEMANUAL SKETCH A SKETCHB 24 29 500 IN LB 500 IN LB Figure8 5 Engine Installation cont POWER PLANT CONTINENTAL Revised 8 31 76 11...

Page 188: ...ll cockpitswitchesand fuel selectorvalvein the OFF position b Disconnect battery cablesat battery c Removeenginecowlingper Paragraph8 5 d Removespinnerand propellerper Paragraph8 9 e Drainfuel filtera...

Page 189: ...obstruct removalof the engine n Removethe engine fromthe aircraft and placeon a suitablesupport 8 22 CLEANING The engine may be cleaned with an appropriate solvent Stoddard or equivalent then dried t...

Page 190: ...removed from the aircraft Refer to identification tags and marks to facilitate the reinstallationof the items NOTE Removeall protective caps and identification tags as each item is installed a Be cert...

Page 191: ...Chapter 10 for approvedhandling andinstallation procedures for flexible fluid hose assemblies 8 30 ENGINEBAFFLES 8 31 DESCRIPTION OF BAFFLES The baffles are aluminum assemblies with rubber asbestos st...

Page 192: ...hat drain holes in heat shields 26 are open to prevent accumulationof oil or solvent Inspect the rubber pads for hardness cracks swelling or a distinct distorted shape If any of these descriptionsare...

Page 193: ...PAWNEEBRAVESERVICEMANUAL FROMOIL COOLER TOOIL COOLER Figure8 6 EngineLubrication SystemDiagram POWER PLANT CONTINENTAL Revised 8 31 76 1I8...

Page 194: ...d after each 50 hours of engine operation under normal operating conditions or 25 hours under severe dust conditions This is accomplishedby removingthe safety wire from the nut on the end of the filte...

Page 195: ...ASS VALVE 6 OIL FILTER 7 HOT OIL LINE TO COOLER S OIL RETURN TO GALLERY Figure8 7 External Oil Filter Element A679 HOOK END TO FIT INTO ADJUSTING SCREW HINGE PIN WIRE SUGGESTED ADJUSTING TOOL 4 1 OIL...

Page 196: ...paste non hardeningblend Part Number2c to all malefittings Donot allow paste to enter the system 8 45 RECOMMENDATIONS FOR CHANGINGOIL a In engines that have been operatingon straight mineraloil for s...

Page 197: ...AIR BOXAND FILTER HOUSING Refer to Figure 8 10 a Open right engine cowl b Disconnect the cockpit control cablefrom the air valvearm c Disconnect the air box from the inlet duct by looseningthe two hos...

Page 198: ...PAWNEE BRAVE SERVICE MANUAL Figure 8 10 Induction Air System Installation Revised 7 20 8113 lI13 POWERPLANT CONTINENTAL...

Page 199: ...DESCRIPTION The fuel injection system is a multi nozzle continuous flow altitude compensating systemwhichregulatesfuel flow to match engine operating conditions The engine driven fuel pump is a two s...

Page 200: ...FUEL MANIFOLD METERING S 2368 Figure 8 11 Engine Fuel System Diagram POWER PLANT CONTINENTAL Revised 8 31 76 1115...

Page 201: ...body mounting screws e Remove the four screwsand washers which secure the throttle body assembly to the induction housing NOTE It may be necessary to remove the intake tube from the number two cylind...

Page 202: ...sure to replace it with a unit of the same part number andcode letter 8 61 INSTALLATION OF FUEL MANIFOLDVALVE a Positiona newgasket between the manifoldvalveand intake manifold b Whenpositioningthe va...

Page 203: ...9 8 69 ENGINE SETUP PROCEDURES Refer to Figure 8 1la and Table VIII IIA The following procedures are given to help maintain the full rich performance of the fuel injection system by manual adjustment...

Page 204: ...p pressure is correct 4 Readjust the idle RPM to the desired setting with the throttle plate adjusting screw e Check and Adjustment for Full Power Performance CAUTION Before attempting any full power...

Page 205: ...A E ANEROID A THROTTLE PLATE IDLE SPEED ADJUSTMENT CW TO INCREASE C IDLE MIXTURE IDLE FUEL FLOW ADJUSTMENT CW TO LEAN ON UNEXPOSED ADJUSTING SCREW REMOVE PUTTY FROM BOSS WHICH INCORPORATES THE ADJUSTI...

Page 206: ...IIA and latest revisionTEM ServiceBulletinNo 75 23 Rev 1 f Prime PressureCheckand Adjustment NOTE This adjustment is made after the engine idle and full throttle pressureadjustments havebeen complete...

Page 207: ...liaryFuel Control Valve Figure 8 12 EngineControl Console TABLEVIII IIA FUEL SYSTEMPRESSURES Propeller Unmetered or RPM Pump Pressure psi Metered or Nozzle Pressure psi 3 5 4 0 18 0 20 0 500 2000 6 0...

Page 208: ...ark plug is too weak for proper ignition Therefore a special starting circuit is providedwhichoffers shower of sparks for easy all weather starting 8 75 MAGNETO 8 76 DESCRIPTIONANDPRINCIPLEOF OPERATIO...

Page 209: ...URFACE HAS DULL GRAY SANDBLASTED APPEARANCE MINOR IRREGULARITIES SMOOTH ROLLING HILLS AND DALES WITHOUT ANY DEEP PITS OR HIGH PEAKS THIS IS A NORMAL CON DITION OF POINT WEAR WELL DEFINED MOUND EXTENDI...

Page 210: ...25 of an inch for examination of contact surfaces Excessive spreading of the breaker points will overstressand damagethe contact spring Desiredcontact surfaceshave a dull gray sand blasted almost roug...

Page 211: ...EEDETAIL C731 237 PAWNEEBRAVESERVICEMANUAL DETAIL A Figure8 15 EngineTimingMarks BENDIX SWITCH LEAD TERMINAL KIT Figure8 16 TimingLight Connected to Magneto Revised 8 31 76 POWER PLANT CONTINENTAL 1J2...

Page 212: ...nted to the engine without removingthe coverfrom the magneto The cover alsohas switch terminal outlets for the right and left sides of the magneto located in the center of the harnesslead outlet secti...

Page 213: ...VESERVICEMANUAL RETARD ANGLES Earlier Present Figure 8 17 Timing Marks on Rotating Magneto 239 RED PAINTED TOOTH Figure 8 18 Painted Tooth Centered in Timing Window Revised 8 31 76 POWER PLANT CONTINE...

Page 214: ...lace the magneto in position on the engine mounting pad and secure with the flange clamps finger tight j Install short adapter leads made from Bendix terminal kit part number 10 382698 into magneto sw...

Page 215: ...ngMarkon Rotor Aligned with Pointer Right Hand Rotation 241 Figure8 20 TimingLight Connected to Magneto 242 Figure8 21 TimingLightConnected to Magnetoand Breakers Figure8 22 CheckingHarnessLead Contin...

Page 216: ...ck rotor in position i Loosen rotor holding tool and turn magnet in direction of rotation until adjacent R or L E gap mark is aligned with pointer and lock in position Both red painted teeth should be...

Page 217: ...g magnet in normal direction of rotation to retard angle of 19degreesand lock in position Carefullyloosen cam securing screw enough to allow retard cam to turn Turn cam in normal direction of rotation...

Page 218: ...RETARD CAM 8 MAIN CAM PAWNEEBRAVESERVICEMANUAL 280 DATA PLATE TOP OF MAGNETO RIGHT MAIN BREAKER CONTACT ASSEMBLY LEFT MAGNETO HIGH TENSION OUTLETS A LEFT MAIN AND RETARD BREAKER ASSEMBLY RIGHT MAGNETO...

Page 219: ...rk plugsand extract the lead terminations Inspect contact springsand compressionsprings for any damage or distortion Inspect sleevesfor cracksor carbon tracking d Inspect couplingnuts and elbowassembl...

Page 220: ...assembly such as replacement of contact springs sleeves compression springs eyelets or grommets can be accomplished with the harness mounted on the engine Lead assembliesmay also be replaced with harn...

Page 221: ...necessary to lubricate the cable and insulating sleeve with a thin film of DC 200 200 000 centistokes or commercial gradealcohol to facilitate assembly e To replaceone of the lead assembliesproceed as...

Page 222: ...AZE I DRILL NO 47 1 4 IN DEEP TAP 3 48 BLENDO D TO I D POLISH O D 12 000 IN MAT NO 30 DRILL RODOR EQUIVALENT Figure 8 26 AssemblyTool SPRINGRETAINER ASSY Figure 8 27 UsingAssemblyTool Revised 8 31 76...

Page 223: ...prevent heat from sticking sleeveto spark plugbarrel Lightly lubricate the shoulder of ferrule to minimizetwisting of ferrule Refer to Figure8 33 UseGO JO NO LOKmanufactured by Goger Inc Akron Ohio 4...

Page 224: ...EDGE OF KNURLING 0 250 MATERIAL BRASS BLUE COATING Figure 8 28 Ferrule Positioned Under Braid Figure 8 29 Ferrule Seating Tool 11 7074 DISTRIBUTOR BLOCK Figure 8 30 Position of 11 8627 Kit and Contac...

Page 225: ...ortion of the collar and possible side loading of the barrel insulator b Remove the spark plug from the engine In the course of engine operation carbon and other combustion products will be deposited...

Page 226: ...n dioxide by a conicalmetal funnel adapter with a hole at the apex just large enough to accommodate the funnel of a CO2 bottle Refer to Figure8 34 Whena seizedspark plugcannot be removed by normal mea...

Page 227: ...tain the deep socket is properly seated on the spark plug hexagonas damageto the plugcould result if the wrenchis cocked to oneside when pressureis applied b Carefullyinsert the terminal insulator in...

Page 228: ...ORDER MAGNETOFIRINGORDER 4 PAWNEE BRAVESERVICEMANUAL 2369 415 36 2 234 56 5 6 UPPER PLUGS 3 LEFT BANK RIGHT BANK 5 4 3 2 LOWER PLUGS Figure8 35 Ignition SystemSchematic Revised 8 31 76 POWER PLANT CON...

Page 229: ...ts not complyingwith the precedingrequirements or whichshowany visual defects 8 89 REMOVALOF STARTINGVIBRATOR a The starter vibrator is mounted on the lower right side of the fire wall in the compartm...

Page 230: ...ition wire Starting vibrator inoperative Turn off primer pump and magnetos set throttle to FULL OPEN and mix ture control to IDLE CUTOFF and crank en gine to clear cylinders of excessfuel Repeat start...

Page 231: ...ctions Replacedefective spark plugs Engine runs rough at idle Improper idle mixture adjustment Readjust idle setting Turn adjustment screw counter clockwiseto richen mixture and clockwiseto lean mixtu...

Page 232: ...ith recommended grade Check magnetos for correct timing Engineruns rough at speeds aboveidle Improper fuel airmix ture Check manifoldconnections for leaks Tighten loose connections Check fuel control...

Page 233: ...rn components Serviceair cleaner Defectiveignition system Fuel nozzlesdefective Improper gradeof fuel Inspect spark plugs for fouled electrodes heavy carbon deposits erosion of electrodes improperly a...

Page 234: ...ts Checkmanifold pressure line for leaks at connec tions and other defects Tighten connections and replace defective parts Checkoperation of mixture control Adjust as re quired to obtain correct opera...

Page 235: ...n or usingimproper grade oil for prevailing ambient temperature Add oil or changeoil to proper viscosity Inspect and clean reliefvalve Highoil temperature Leaking damagedor looseoil line connec tions...

Page 236: ...oveand cleanoil screens Checkentire engine Replacegauge Excessiveoil con sumption Failingor failedbearings Checksump for metal par ticlesand if found overhaulof engine is indicated Wornor broken pisto...

Page 237: ...d Propeller Spinner Installation of Propeller and Propeller Spinner Blade Track er Governor Removal of Propeller Governor Installation of Propeller Governor Rigging and Adjustment of Propeller Governo...

Page 238: ...Magneto to Engine 8A 38 Harness Assembly 8A 39 Inspection of Harness 8A 40 Removal of Harness 8A 41 Maintenance of Harness 8A 42 Installation of Harness 8A 43 Spark Plugs 8A 44 Removal of Spark Plugs...

Page 239: ...GINECOWLING 8A 4 DESCRIPTION The cowling completely encloses the engine and consists of a reinforced plastic lower nose and bottom section a reinforced plastic upper nose section attached to a flat al...

Page 240: ...MBLY COWL ATTACHMENT 7 HINGE UPPER LEFT 8 LOUVER UPPER COWL 9 STUD 10 RETAINER 11 DOOR ASSEMBLY COWL UPPER LEFT 12 BRACKET COWL MOUNTING 13 HOOK ASSEMBLY COWL LATCH 14 AIR FILTER ACCESS COVER 15 SUPPO...

Page 241: ...4 NON COUNTER BORED MOUNTING HOLE 5 REAR BULKHEAD 6 PROPELLER BLADE 7 SPINNER 8 LOW PITCH STOP JAM NUT 9 LOW PITCH STOP 10 BOLT FORWARD SPINNER ATTACHMENT II FORWARD BULKHEAD PAWNEEBRAVESERVICEMANUAL...

Page 242: ...Support propellerassemblywith an appropriate slingand hoist 2 Placea drip pan under propeller to catch oil spillage 3 Remove safety wire from propeller mounting studs and remove studs in a sequence no...

Page 243: ...head Secure with attaching screws and torque screws to specification Refer to Table VIIIA I 8A 12 BLADETRACK Blade track is the ability of one blade tip to follow the other whilerotating in almost the...

Page 244: ...c Remove the governormounting stud nuts It will be necessary to raise the governor as the nuts are beingremoved before the nuts can be completelyremoved d Remove the mounting gasket If the governor is...

Page 245: ...RPMsetting should be adjusted as follows 1 Shut down the engine and remove the upper engine cowl 2 Adjust the governor by means of the fine adjustment screw 2 for 2700 RPM To do this loosen the high R...

Page 246: ...adjust the control travel disconnect the control cable end from the control arm loosen the cable end jam nut and rotate the end to obtain the desired level clearance Reconnect the cable end and tight...

Page 247: ...ly clean before assembling e Never reuse any lockwire lockwashers tablocks tabwashers or cotter pins All lockwire and cotter pins must fit snugly in holes drilled in studs and bolts for locking purpos...

Page 248: ...tings should be covered to prevent contamination k Disconnect both lines from each oil cooler at the coolers 1 Disconnect the magneto P leads at the magnetos m Disconnect the engine vent tube at the e...

Page 249: ...OVERNOR 10 FUEL NOZZLE 11 ENGINE MOUNT 12 ACCESS DOOR AIR FILTERS 13 AIR FILTER 14 FILTER RETAINER 15 COVER FILTER 16 BOLT NUT WASHER 17 SANDWICH J 3049 38 18 SPACER J 12333 2 19 ENGINE MOUNT 20 PLUG...

Page 250: ...divider g Connect the manifold pressureline at the right rear sideof the engine h Connect the static and fuel flow line at the right rear engine baffle i Connect the oil pressureline j Install the lin...

Page 251: ...R Adjust the control linkages as required to insure a minimum of 030 of an inch cushion at the cockpit control forward position with the governor control arm againstthe highRPMstop d FUEL SHUTOFFAND A...

Page 252: ...KE 4 FLAP INDICATOR 5 KNOB FLAP ACTUATOR SWITCH 6 KNOB ENGINE MIXTURE CONTROL 7 FRICTION LOCK 8 KNOB THROTTLE CONTROL 9 KNOB PROPELLER PITCH CONTROL 10 STATIC SYSTEM DRAIN PAWNEEBRAVESERVICEMANUAL 242...

Page 253: ...stop screw so that the engineidles at 550 600 RPM If the RPMchangesappreciably after making the mixture adjustment during the succeedingsteps readjust the idle speed to the desired RPM d When the idli...

Page 254: ...WARNING LIGHT DIVIDER FLOW DIVIDER VALVE SECTION AA CONNECTED TO THROTTLE LEVER LINKAGE THROTTLE VALVE CONSTANT HEAD IDLE SPRING CONSTANT EFFORT SPRING AIR DIAPHRAGM FUEL DIAPHRAGM TUBE Figure8A 7 Sc...

Page 255: ...Revised 1 19 78 POWER PLANT LYCOMING PAWNEEBRAVESERVICEMANUAL 1K22...

Page 256: ...bles develop which appear to be caused by the ignition system it is advisableto check the spark plugsand wiringfirst before workingon the magnetos c Should the trouble appear definitely associated wit...

Page 257: ...rical contact andhighest efficiency of performance f Minor irregularities or roughness of point surfaces are not harmful Refer to Figure 8A 10 center Neither are small pits or mounds if not too pronou...

Page 258: ...nts of the magneto it is recommended that the manufacturer s recommendedserviceinstructions be followed 8A 35 REMOVALOF MAGNETO Beforeremoving the magneto make sure magneto switchesare off a Removethe...

Page 259: ...ontact assembly to obtain the clearance of 0 016 of an inch Tighten contact assembly securingscrewsto 20 to 25 inch pounds 4 Install the 11 8693 Timing Plate Assembly and the 11 8149 Pointer Assembly...

Page 260: ...up and points just opening Tighten adjusting knob of 11 8465 Rotor HoldingTool Apply a light coating of Bendix GreaseP N 10 27165 to teeth of distributor gear if needed The largedistributor gearincorp...

Page 261: ...aximum 2 Hold magneto as shown in Figure 8A 14 Pull heel of flyweight outward with the hooked wire and make certain that feeler gauge of 0 010 inch minimum thickness will pass between stop pin and the...

Page 262: ...ll hole located at the two o clock position on the front face of the starter housing Refer to Figure 8A 15 NOTE The advance timing mark on the top face of the starter ring gear is marked at both 20 an...

Page 263: ...ly to seat cover squarely on magneto Torque nuts to 18to 22 inch pounds 8A 38 HARNESSASSEMBLY 8A 39 INSPECTIONOF HARNESS a Check lead assemblies for nicks cuts mutilated braiding badly worn section or...

Page 264: ...the lead retracted hook the end of the contact springas shownin Figure8A 17 2 Usingthe needleor pencil unscrewthe spring 3 Slideinsulatingsleeveand springretainer assemblyoff end of lead assembly 4 R...

Page 265: ...N DEEP TAP 3 48 BLENDO D TO POLISH O D I I 12 000 IN MAT NO 30 DRILL RODOREQUIVALENT Figure 8A 18 AssemblyTool SPRINGRETAINERASSY Figure 8A 19 UsingAssemblyTool REQUIREDLENGTH Figure8A 20 MeasuringLea...

Page 266: ...at spark plugend SeeFigure8A 20 b Tothe length determined in Step a add 1 3 4inches NOTE Sparepart leadsare supplied in variouslengths Usealead which is longerthan but nearest to the desired length 6...

Page 267: ...rule binds in the outlet well Position the Scintilla 11 7074 Ferrule Seating Tool Figure 8A 24 over the wire and firmly seat the ferrule by tapping the seatingtool with ahammer or by usingan arbor pre...

Page 268: ...ts using denatured alcohol 16 Install clampsand cableties as necessaryto secure lead to the engine 233 Figure 8A 28 Lead AssemblyInstalled inGrommet Added 8 31 76 PAWNEE BRAVE SERVICE MANUAL 232 1 707...

Page 269: ...GS 8A 44 REMOVALOF SPARKPLUGS a Loosen the coupling nut on the harness lead and remove the terminal insulator from the spark plug barrel well NOTE When withdrawing the ignition cable lead connection f...

Page 270: ...ark plug Place the funnel of the C02 bottle inside the funnel adapter and release the carbon dioxide to chill and contract the spark plug Break the spark plug loose with a wrench A warmcylinder head a...

Page 271: ...park plugs Torque 360 to 420 inch pounds CAUTION Makecertain the deep socket is properly seated on the spark plug hexagon as damageto the plug could resultif the wrenchis cocked to one side whenpressu...

Page 272: ...efectivebattery Improper operation of magnetobreaker Lack of sufficient fuel flow Waterin fuel injector Internal failure Open throttle and unload engine by engagingstarter Mix ture in idle cut off Ope...

Page 273: ...system Adjust fuel pressure Low power and uneven running Mixture too rich indi cated by sluggishen gine operation red ex haust flame at night Extreme casesindi cated by black smoke from exhaust Readj...

Page 274: ...er system and replace defective parts Throttle lever out of Adjust throttle lever adjustment Improper fuel flow Check strainer gauge and flow at fuel injec tor inlet Restriction in air Examine air sco...

Page 275: ...efectivepressure Replace gauge gauge Stoppagein oil pump Check line for obstruc intake passage tion Cleansuction strainer Highoil temperature See High OilTemper ature in Trouble column Highoil tempera...

Page 276: ...veoil consump tion Lowgrade of oil Fill tank with oil con formingto specifica tions Failing or failed bearings Wornpiston rings Incorrect installation of piston rings Failure of rings to seat new nitr...

Page 277: ...PAWNEE BRAVE SERVICE MANUAL 1L20 THRU 1L24 INTENTIONALLY LEFT BLANK...

Page 278: ...PAWNEE BRAVE SERVICE MANUAL CARD 2OF2 PA 36 285 300 375 PIPER AIRCRAFT CORPORATION PART NUMBER 761 471...

Page 279: ...listof paragraph titles and appropriate Grid locationnumbersisgivenat thebeginning of each Chapter relating to the information withinthat Chapter 5 Identification of Revised Material Revisedtext and i...

Page 280: ...PIPER PAWNEE SERVICE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK 2A3...

Page 281: ...TROLS 1F4 VI HYDRAULIC SYSTEM 1G3 VII LANDING GEAR AND BRAKE SYSTEM 1G11 VIII POWER PLANT CONTINENTAL 1H10 VIIIA POWER PLANT LYCOMING 1K4 AEROFICHE CARD NO 2 VIIIB POWER PLANT LYCOMING 375 2A9 IX FUEL...

Page 282: ...B16 8B 23 Measuring Lead Assembly Length 2B16 8B 24 Cutting Metallic Braid From End of Lead 2B17 8B 25 Unbraiding Metallic Shielding 2B17 8B 26 Forming Shielding Around Ferrule 2B18 8B 27 Ferrule Seat...

Page 283: ...ing Alternator 2F21 11 15 Brush Installation 2F23 11 16 Internal Wiring Diagram 2F23 11 17 Battery Box 2G2 11 18 Regulator Schematic Internal 2G4 11 18a Application of OvervoltageControl 2G5 11 18b Te...

Page 284: ...ngTube Installation 2J4 14 4 Wind Driven Liquid Dispersal System 2J5 14 4a Hydraulic Driven Liquid DispersalSystem 2J6 14 4b Hydraulic Spray System Schematic 2J7 14 4c Hydraulic Driven Spray Pump Asse...

Page 285: ...or Fuel Quantity Indicator Manifold Pressure Gauge Fuel Flow Gauge Oil Pressure Gauge Oil Temperature Gauge Cylinder Head Temperature Gauge Tachometer Alternator Specifications Alternator Belt Tension...

Page 286: ...16 8B 14 Removal of Propeller Governor 2A16 8B 15 Installation of Propeller Governor 2A16 8B 16 Riggingand Adjustment of Propeller Governor 2A17 8B 17 Engine 2A18 8B 7a Standard Practices Engine 2A18...

Page 287: ...8B 37 MagnetoTimingProcedure InternalTiming 8B 38 HarnessAssembly 8B 39 Inspection of Harness 8B40 Removal of Harness 8B 41 Maintenanceof Harness 8B 42 Installation of Harness 8B43 Spark Plugs 8B 44 R...

Page 288: ...nit utilizing oil pressure from the propeller governor to move the bladesinto highpitch The centrifugaltwistingmoment of the blades tend to move them into low pitch in the absence of governoroil press...

Page 289: ...P 6 SCREW ASSEMBLY COWL ATTACHMENT 7 HINGE UPPER LEFT 8 LOUVER UPPER COWL 9 STUD 10 RETAINER 11 DOOR ASSEMBLY COWL UPPER LEFT 12 BRACKET COWL MOUNTING 11 HOOK ASSEMBLY COWL LATCH 14 AIR FILTER ACCESS...

Page 290: ...OF ENGINECOWLING a Clean the inside surfacesof the cowlingwith a suitablesolvent Stoddard or equivalent and then wipe with a clean cloth Washthe painted surfacesof the cowlingwith a solution of mild s...

Page 291: ...upport propeller assemblywith an appropriateslingand hoist 2 Place a drip pan under propellerto catch oilspillage 3 Remove safety wire from propeller mounting studs and remove studs in a sequence not...

Page 292: ...nd torque screws to specification Refer to Table VIIIB I 8B 12 BLADETRACK Blade track is the ability of one blade tip to follow the other whilerotating in almost the same plane Excessivedifferencein b...

Page 293: ...ore the nuts can be completelyremoved d Remove the mounting gasket If the governor is to beremoved for a considerablelength of time and another unit not substituted it is advisableto cover the mountin...

Page 294: ...hRPMsetting should be adjusted as follows 1 Shut down the engine and removethe upper enginecowl 2 Adjust the governor by means of the fine adjustment screw 2 for 2500 RPM To do this loosen the high RP...

Page 295: ...re exposed NOTE Dust caps used to protect open lines must always be installed OVER the tube ends and NOT IN the tube ends Flow through the lines may be blocked off if lines are inadvertently installed...

Page 296: ...en fuel oil vacuum lines and fittings should be covered to prevent contamination k Disconnect both lines at the oil cooler 1 Disconnect the magneto P leads at the magneto m Disconnect the engine vent...

Page 297: ...mps f Connect the injector line to the flowdivider g Connect the manifoldpressureline at the right rear sideof the engine h Connect the static andfuel flow line at the right rear engine baffle i Conne...

Page 298: ...COVER FILTER 8 ENGINE MOUNT 9 VENT TUBE 10 OIL COOLER 11 OIL FILTER 12 FUEL PUMP 13 MAGNETO 14 FUEL INJECTOR 15 OILSUMP DRAIN 16 BOLT NUT WASHER 17 SANDWICH J 13051 5 18 SPACER J 10931 15 19 ENGINE MO...

Page 299: ...AKE 4 FLAP LIGHT SWITCH 5 FLAP ACTUATOR SWITCH 6 MIXTURE CONTROL 7 FRICTION LOCK 8 THROTTLE CONTROL 9 PROPELLER PITCH CONTROL 10 STATIC SYSTEM DRAIN PAWNEEBRAVESERVICEMANUAL 2 Figure 8B 6 EngineContro...

Page 300: ...st the control linkages as required to insure a minimum of 030 of an inch cushion at the cockpit control forward position with the governorcontrol arm againstthe high RPMstop d FUEL SHUTOFF AND ALTERN...

Page 301: ...top screw so that the engineidles at 550 600 RPM If the RPMchangesappreciably after making the mixture adjustment during the succeeding steps readjust the idle speed to the desired RPM d When the idli...

Page 302: ...E ONE PER CYLINDER FLOW DIVIDER VALVE II II SECTION AA IDLE VALVE LEVER CONNECTED TO CONNECTED TO THROTTLE VALVE THROTTLE LEVER MANUAL MIXTURE LINKAGE CONTROL AND IDLE CUT OFF LEVER THROTTLE LE VE R I...

Page 303: ...CLEANINGAND INSPECTIONOF FUEL AIRBLEEDNOZZLE a Clean the nozzle with acetone or equivalent and blow out all foreign particles with compressed airin the direction opposite that of fuel flow Do not use...

Page 304: ...arting When the engine fires and begins to increase speed the starter switch is released which in turn de energizesthe starter opens the vibrator circuit and retard breaker circuit thus rendering them...

Page 305: ...T IS SMOOTH AND FLAT SURFACE HAS DULL GRAY SANDBLASTED APPEARANCE MINOR IRREGULARITIES SMOOTH ROLLING HILLS AND DALES WITHOUT ANY DEEP PITS OR HIGH PEAKS THIS IS A NORMAL CON DITION OF POINT WEAR WELL...

Page 306: ...to its spring f Examine the contact points for excessivewear or burning Figure8B 11shows how the average contact point willlook whensurfaces areseparatedfor inspection CAUTION Do not open point contac...

Page 307: ...o drops of BendixBreakerFelt Lubricant 10 86527 h Check the capacitors for looseness in the magneto cover of the harness assemblyand for any physical damage Using a Bendix 11 1767 1 2 or 3 condenser t...

Page 308: ...EEBRAVESERVICEMANUAL 279 A RETARD ANGLES E GAP ANGLES Figure 8B 13 TimingMarkson MagnetoRotor 239 RED PAINTED TOOTH Figure8B 14 PaintedTooth Centeredin TimingWindow POWERPLANTLYCOMING375 ADDED 1 19 78...

Page 309: ...OCK WASHER 6 FLAT WASHER 7 RETARD CAM 8 MAIN CAM 2 Figure 8B 15 Cam End View of Magneto PAWNEEBRAVESERVICEMANUAL 280 RIGHT MAIN BREAKER CONTACT ASSEMBLY LEFT MAGNETO HIGH TENSION OUTLETS A LEFT MAIN A...

Page 310: ...gMark on Rotor Aligned with Pointer Right Hand Rotation Figure8B 17 TimingLight Connected to Magneto 242 241 Figure8B 18 TimingLight Connected to Magnetoand Breakers Figure 8B 19 CheckingHarness Lead...

Page 311: ...ove the magneto drive gear backlash by turning the propeller opposite to normal rotation approximately 40 past number one firing position then turn propellerin direction of normal rotation up to numbe...

Page 312: ...ry disconnect the timing light and removethe adapter leads o Reinstall the plugs in the timing inspection holes and torque to 12 15inch pounds Loosely install the harness with clamps and or brackets R...

Page 313: ...timing pointer is aligned with L E gap mark Lock rotating magnet in position where points just open o Loosen right main breaker securing screws and position breaker so cam follower is pressed against...

Page 314: ...ped threads on coupling nut e Test continuity of each harness lead using a High Tension Lead Tester part number 11 8888or 11 8888 1from Bendix as follows 1 Connect black test lead to contact spring an...

Page 315: ...PAWNEE BRAVE SERVICE MANUAL 243 Figure 8B 19a Testing Insulation Resistance of Harness Lead THIS SPACE INTENTIONALLY LEFT BLANK Added 7 20 81 2B14 POWER PLANT LYCOMING 375...

Page 316: ...fectivecomponent andreassembleas follows a Fabricate a tool asshownin Figure 8B 21for installing the insulatingsleevesovercable terminals b Push the tool through insulatingsleeveand springretainer ass...

Page 317: ...TAP 3 48 BLENDO D TO I D POLISH O D 12 000 IN MAT NO 30 DRILL RODOREQUIVALENT Figure8B 21 AssemblyTool C346 SPRINGRETAINERASSY SLEEVE Figure8B 22 UsingAssemblyTool C346 REQUIREDLENGTH Figure 8B 23 Mea...

Page 318: ...t spark plugend See Figure 8B 23 b To the length determinedin Step a add 1 3 4inches NOTE Spare part leadsaresupplied invariouslengths Usea lead whichis longer than but nearest to the desired length 6...

Page 319: ...cintilla 11 7074 Ferrule Seating Tool Figure 8B 27 overthe wire and firmly seat the ferrule by tapping the seating tool with a hammer or by using an arbor press 12 Measure 1 2 inch from tapered ferrul...

Page 320: ...tisfactoryconnection can be made by soldering with Kester Flux 709 or equivalent and a non corrosive solder After soldering clean solder joints using denatured alcohol 16 Install clampsand cable ties...

Page 321: ...PLUGS 8B44 REMOVALOF SPARKPLUGS a Loosen the coupling nut on the harness lead and remove the terminal insulator from the spark plug barrel well NOTE When withdrawing the ignition cable lead connection...

Page 322: ...funnel of the C02 bottle inside the funnel adapter and releasethe carbon dioxide to chill and contract the spark plug Break the spark plug loose with a wrench A warmcylinderhead at the time the carbon...

Page 323: ...k plugs Torque 360 to 420 inch pounds CAUTION Make certain the deep socket is properly seated on the spark plug hexagon as damageto the plugcould result if the wrenchis cocked to one sidewhen pressure...

Page 324: ...es Checkfuel selector valvefor proper tank Checkfuel pressure with electricboost pump ON Checkmixture control knob for fullrich Openthrottle and unload engineby engagingstarter Mix ture inidle cut off...

Page 325: ...ective parts Throttle lever out of Adjust throttle lever adjustment Improper fuel flow Checkstrainer gauge and flow at fuelinjec tor inlet Restriction in air Examine airscoop and scoop removerestricti...

Page 326: ...system Adjust fuelpressure Lowpower and uneven running Mixturetoo rich indi catedby sluggishen gineoperation red ex haust flameat night Extreme casesindi catedby blacksmoke fromexhaust Readjustmentof...

Page 327: ...ing Examine sump for metal particles If found overhaul of en gineis indicated Defectivetemperature gauge Replacegauge Excessiveoilconsump tion Low grade of oil Fill tank with oilcon formingto specific...

Page 328: ...uge gauge Stoppagein oil pump Checkline for obstruc intake passage tion Cleansuction strainer Highoil temperature See HighOil Temper ature in Trouble column Highoil temperature Insufficientair Checkai...

Page 329: ...2C4 THRU 2C24 INTENTIONALLY LEFT BLANK...

Page 330: ...lation of Polyurethane Foam Baffles 2D18 9 14 Fuel Quantity Indicator System 2D19 9 15 Removal of Fuel Quantity Transmitter 2D19 9 16 Installation of Fuel Quantity Transmitter 2D21 9 17 Fuel Quantity...

Page 331: ...uxiliary Fuel Control System 9 35 Operation of Auxiliary Fuel Control Valve 9 36 Removal of Auxiliary Fuel Control Valve 9 37 Disassembly and Cleaning of Auxiliary Fuel Control Valve 9 38 Assembly of...

Page 332: ...fuel injection system On PA 36 285 aircraft Serial Nos 7360020 and up and earlier serial numbered aircraft which have been modified by the installation of PiperKit 760 782 the electric fuelpump alongw...

Page 333: ...8 SUPPORT BRACKET 9 TUBE ASSEMBLY FUEL SHUT OFF VALVE 10 CABLE ASSEMBLY 11 WING LEADING EDGE RIGHT 12 CAP ASSEMBLY FUEL CELL RIGHT 13 CHECK VALVE 14 FUEL CELL LEFT 15 COVER FUEL SENDER LEFT 16 FUEL ST...

Page 334: ...SHUTOFF VALVE 10 CABLE ASSEMBLY 11 WING LEADING EDGE RIGHT 12 CAP ASSEMBLY FUEL CELL RIGHT 13 CHECK VALVE 14 FUEL CELL LEFT 15 COVER FUEL SENDER LEFT 16 FUEL STRAINER 17 VENT HEADER TANK LEFT 18 CHECK...

Page 335: ...OFF VALVE 10 CABLE ASSEMBLY 11 WING LEADING EDGE RIGHT 12 CAP ASSEMBLY FUEL CELL RIGHT 13 CHECK VALVE 14 FUEL CELL LEFT 15 COVER FUEL SENDER LEFT 16 FUEL STRAINER 17 VENT HEADER TANK LEFT 18 CHECK VA...

Page 336: ...ONTROL CABLE ASSEMBLY 7 TUBE ASSEMBLY FUEL SUPPLY 19 STRAINER 8 FUEL SHUTOFF VALVE 20 TUBE ASSEMBLY VENT 9 TUBE ASSEMBLY FUEL DRAIN 21 TANK ASSEMBLY HEADER 10 VALVE DRAIN 22 CHECK VALVE 11 FILTER ASSE...

Page 337: ...ICEMANUAL 2404 SKETCHA WORD HINGE ON VALVE TO FACE UP AND FLOW ARROW TO POINT INBOARD AS SHOWN 22 SKETCHB Figure9 2 Fuel System Installation SerialNos 7360001 to 7360019 incl PA 36 285Only Revised 8 3...

Page 338: ...12 JOINT ASSEMBLY 13 STRAPS 14 AUXILIARY FUEL PUMP 27 FUEL CELL LEFT 15 CHECK VALVE 21 TEE 16 HOSE ASSEMBLY FUEL SUPPLY 29 SAFETY WIRE 17 FUEL CELL RIGHT 30 TUBE ASSEMBLY FUEL RETURN 18 CONTROLCABLEA...

Page 339: ...CEMANUAL 2403 SKETCHA 30 26 C708 WORD HINGE ON VALVE TO FACE UP AND FLOW ARROW TO POINT INBOARD AS SHOWN SKETCHB Figure9 2a Fuel System Installation SerialNos 7360020 and up PA 36 285Only Revised 8 31...

Page 340: ...VALVE DRAIN 11 FILTER ASSEMBLY 12 JOINT ASSEMBLY 13 STRAINER 14 FUEL CELL RIGHT 15 CHECK VALVE 16 TUBE ASSEMBLY VENT 17 TANK ASSEMBLY HEADER 18 SENDER 19 SPACER 20 GASKET 21 FUEL CELL LEFT 22 CONTROL...

Page 341: ...AVE SERVICE MANUAL 2404 SKETCHA 2405 WORD HINGE ON VALVE TO FACE UP AND ARROW TO POINT INBOARD AS SHOWN C708 15 15 SKETCHB Figure 9 2b Fuel System Installation PA 36 300 and PA 36 375 Revised 10 27 82...

Page 342: ...ust free and the building should provide good ventilation All vent fan outlets should be located so as to prevent the vapors from being wind carried back into the hangar Safety precautions per section...

Page 343: ...ASKET FUELSENDER 6 BOLTASSEMBLY 7 SENDER 8 GASKET FUELSENDER 9 SCREWASSEMBLY 10 CAPASSEMBLY FUELCELL 11 GASKET FUELCELLCAP 12 AFTUNERASSEMBLY FUELCELLLEFT 13 STRAINER 14 FORWARDLINER ASSEMBLY FUELCELL...

Page 344: ...oles in the wing spar and reconnect the fuel vent line that runs through the fuel cellto the ventline that runs outthroughthe wingtothe tip Reach throughthefuelfillerhole and feelthe vent lineto insur...

Page 345: ...ose of replacement of new foam or for maintenance on the fuel cell remove the cell from the wing per Paragraph 9 6 CAUTION All precautions for an open fuel cell should be observed Once the fuel cell i...

Page 346: ...oam at the fuel filler opening Test this foam by attempting to pull or tear a few strands of the material loose from the baffle If the strands tear easily or if a visual inspection shows loose strands...

Page 347: ...ion the foam baffles must be dry of fuel to prevent fuel vapors from creating an explosion hazard or a health endangering environment Refer to Caution in Paragraph 9 12b CAUTION Correct positioning of...

Page 348: ...top of the baffle After installing the fifth and sixth baffles check to ensure that the fuel sender cut out in the foam lines up with the hole inthe top of the fuel cell through which the fuel sender...

Page 349: ...RIGHT CELL EVENNOS LEFTCELL FUEL SENDER C VENT TUBE CUT OUT FUELFILLER CUT OUT OUTBOARD END Figure 9 4 Polyurethane Foam Baffle Installation Sequence PAWNEE BRAVE SERVICE MANUAL UELSENDER UT OUT INBO...

Page 350: ...4 4 4 ohmsin the full position c The header tank unit should read 8 2 ohms with the internal float in the empty position and 3 6 2 ohms in the full position NOTE Do not attempt to adjust the sendingun...

Page 351: ...nk on the main spar and secure withattaching hardware d Reconnect the check valvesand disconnectedlinesto the header tank e Reconnect the electrical leadsto the sender unit f Refill the system with cl...

Page 352: ...alve spring 8 relief ball 9 and seat 10 b Place the filter cartridge assembled on the housing stud 5 Be certain that the end of the outer tube 3 has positioned itself in the filter body c Secure the f...

Page 353: ...of the airframe electric fuel pump at the engine fuel system inlet to accomplish both of the functions previously described This is done by allowingsome of the excessoutput of the airframeelectric fu...

Page 354: ...f the emergencysystem while observing the fuel flow gauge A minor fluctuation of thefuel flow indicates that the emergencysystem has been operating The red light on the upper instrument panelshould be...

Page 355: ...gency spool valve Again a flexible diaphragm is used to seal the manifold pressure chamber but allow the pressure therein to act on the top of the emergencyspool valve The manifoldpressurechamber also...

Page 356: ...5 PLUG 16 IDLE PRESSURE ADJUSTING SCREW 17 PRIME PRESSURE ADJUSTING SCREW 18 SPRING 19 NUT 20 CONTROL PRESSURE ADJUSTING SCREW 21 O RING 22 LOCK NUT 23 ELECTRICAL CONNECTION RAIN PORT AUXILIARY FUEL C...

Page 357: ...SURE PAWNEEBRAVESERVICEMANUAL 2386 BYPASS FUEL OUT SEAL CAVITY DRAIN FUEL CONTROL PRESS ENGINE BEING PRIMED MANIFOLD PRESSURE SENSE FUEL OUT SEAL CAVITY DRAIN FUEL CONTROL PRESS ENGINE RUNNING Figure...

Page 358: ...pool 12 from the valve body 7 by pushing it out towards the manifoldpressurechamberend g Do not remove plugs 14 and 15 fromthe valvebody h Adjusting screws 16 and 17 should not be moved or removed as...

Page 359: ...SIG 3 Three Throttle Valves 4 Electric Fuel Pump Airborn Part No 2B6 16 5 Fuel Filter 150 micron max 6 Vacuum Pump 7 Vacuum Gauge 8 24 to 28 Volt D C Power Supply 9 Miscellaneous fuel lines fittings a...

Page 360: ...ROTTLE VALVE NO I SET FOR 1 0TO 1 5 RSJ P 235 RRH FLOW R T COND FUELFLOW METER CONTROL PRESSURE GAUGE 0 35PSI FUEL PRESSURE 28 V D C 24 V D C VACUUM GAUGE VACUUM REGULATOR MANIFOLD PRESSURE VACUUM SOU...

Page 361: ...locknut and recheck the setting Safety the locknut e There shall be no external leakagethroughout the preceedingtests and adjustments other than seal cavity leakage Solenoid drain fuel leakageis acce...

Page 362: ...eplaceif necessary Checkand adjust if necessary Low fuel pressure Pressureadjustments set incorrectly Adjustpump pressure per EngineSetup Procedures SectionVIII of this manual Defectiveengineor aux il...

Page 363: ...n and Leak Test 2E15 10 13 Removal and Installation of System Components 2E15 10 14 Troubleshooting 2E17 10 15 Instruments Flight 2E17 10 16 Sensitive Altimeter 2E17 10 17 General 2E17 10 18 Troublesh...

Page 364: ...oval and Replacement 2F2 10 41 Oil Pressure Oil Temperature Cylinder Head Temperature Combination Gauge 2F2 10 42 General 2F2 10 43 Troubleshooting F2 10 44 Removal and Replacement 10 45 Tachom eter 2...

Page 365: ...indication Warning lights are installed to indicate unsatisfactory or dangerous conditions Instruments requiring power from the electrical system are providedwith circuit breakersto isolate the indiv...

Page 366: ...static system vents the altimeter and airspeed indicator through tubing to two static vents one on each sideof the turtledeck just aft of the cockpit A pitot system drain valveis located on the under...

Page 367: ...FUEL FLOW GAUGE 6 EMERGENCY FUEL PUMP SWITCH 7 EMERGENCY FUEL SYSTEM INDICATOR LIGHT PA 36 285 ONLY 8 PLACARDS 9 FUEL QUANTITY INDICATOR 10 PLACARDS 11 CRASH ROLL AND ANTI GLARE PANEL 12 PRIMER SWITCH...

Page 368: ...0 12 STATIC SYSTEMINSPECTION AND LEAK TEST A source of negativepressure is needed to leak test the static system To leak test the system proceed as follows a Install atest fixture and hose to one of t...

Page 369: ...EMBLY STATIC LINE 11 HOSE ASSEMBLY MANIFOLD PITOT DRAIN 12 TUBE ASSEMBLY STATIC LINE 13 VALVE ASSEMBLY AIR 14 HOSE ASSEMBLY Al R VALVE 15 TUBE ASSEMBLY STATIC LINE 16 SEAL PITOT DRAIN 17 BLOCK MANIFOL...

Page 370: ...tatic system are opened for check system must be rechecked per Part FAR 23 1325 10 15 INSTRUMENTS FLIGHT 10 16 SENSITIVEALTIMETER 10 17 GENERAL The altimeter indicates altitude in feet abovesealevel T...

Page 371: ...ivemechanism Improper venting Wronglubrication or lack of lubrication Out of engagement Not tight when alti meter wasreset Casegaskethardened Replaceinstrument Replaceinstrument Eliminateleak in stati...

Page 372: ...AL The magnetic compassis a self containedinstrument This instrument has an individual light which is connected to the instrument lighting circuit The compass correction card is located in the card ho...

Page 373: ...repair instru ment Defectivelight Burnedout lamp or broken circuit Checklamp or continuity of wiring Cardsticks Altitude compensating diaphragmcollapsed Replaceor repair instru ment Carddoes not move...

Page 374: ...y operatingrangemarkingsfor safe operation of the airplane 10 26 TROUBLESHOOTING Refer to TableX IV TABLE X IV AIRSPEEDINDICATOR Trouble Cause Remedy Pointersof static instru ments do not indicate pro...

Page 375: ...ator back to zero indicating no turn 10 30 TROUBLESHOOTING Refer to Table X V TABLEX V TURNCOORDINATOR Trouble Cause Remedy Pointer failsto respond Incorrect sensitivity Incorrect turn rate electric F...

Page 376: ...vel NOTE Gold colored indicators are not interchangeable with blue colored indicators The color of the indicator should agreewiththe colorof the senders in the header unit and wing tanks 10 35 TROUBLE...

Page 377: ...the upper portion of the instrument panel in place of low pressure warning light and indicates that the auxiliary electric fuel pump along with an auxiliary fuel control valve are utilized as an emer...

Page 378: ...ing the pressure at which fuel is deliveredto the fuelinjection nozzles The gaugeis marked as a flow meter 10 39 TROUBLESHOOTING Refer to TablesX VIIand X VIII TABLE X VII MANIFOLDPRESSUREGAUGE Troubl...

Page 379: ...he pressureis calibratedto pounds per squareinch The oil temperature is electrically received from an oil temperature bulb located in the oil cooler bypassvalvehousing and calibrated in degreesFahrenh...

Page 380: ...gine unit and lary Wiringopen wiringto instrument or Impropercalibration Repair or replace adjustment oveas Brokenor damagedcap Checkengineunit and illary or open wiring wiring TABLEX XI CYLINDERHEADT...

Page 381: ...XII TABLEX XII TACHOMETER Trouble Cause Remedy Noreading on indicator either permanent or intermittent Brokenshaft Replaceinstrument Loosecableconnections Tightencable Pointer oscillates excessively R...

Page 382: ...ssure and vacuum gaugelocated in the upper instrument panel This gaugeis connected by tubing to the center spray boom assembly The pressure side of the gauge 0 150 scale indicatespressure of liquid fo...

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Page 384: ...THIS PAGE INTENTIONALLY LEFT BLANK 2F7...

Page 385: ...rvice Test Specifications 2F22 11 17 Checking Alternator Belt Tensions 2F22 11 18 Master Switch 2F24 11 19 Description 2 F 2F24 11 20 Battery 2F24 11 20 Battery 2F24 11 21 Battery Description 2F24 11...

Page 386: ...Taxi Lights 2G13 11 58 Installation of Landing and Taxi Lights 2G13 11 58a Optional Night Working Lights 2G16 11 58b Description of Night Working Lights 2G16 11 58c Removal of Main Working Lights 2G16...

Page 387: ...ter PA 36 300 only 11 43 2H22 Electrical System Alternator Starter PA 36 375 only 11 46 2H24 Electrical System Auxiliary Power Receptacle 11 42 2H21 Engine System Gauges PA 36 285 only 11 39 2H20 Engi...

Page 388: ...causesand suggestedremedies Thewiringdiagramsincluded at the end of this section will give a physical breakdown of the different electricalcircuits used in this airplane After the trouble has been cor...

Page 389: ...aker 10 amperes and multiply this by 80 percent you will arrive at a current of 8 amperes This is the approximate current drawn by the taxi light Therefore when the taxi light is switched on there wil...

Page 390: ...13 SWITCH RIGHT MAGNETO 14 SWITCH AGITATOR MOTOR 15 SWITCH LANDING LIGHTS 16 SWITCH TAXI LIGHTS 17 SWITCH NAVIGATION LIGHTS 18 SWTICH ANTI COLLISION LIGHTS 19 SWITCH PANEL LIGHTS 20 SWITCH EMERGENCY...

Page 391: ...ld circuit by the followingprocedure 1 Turn alternator switch ON then use light or voltmeter to check presenceof 24 voltson the terminal of wire P8A a If voltage is not present check for voltageat the...

Page 392: ...e thru bolts Hold the pulley with a strapwrenchand remove the pulley nut The pulley must be removed with a puller Removethe fan woodruffkey and spacer from the shaft c Remove the four thru bolts and t...

Page 393: ...COMPONENTS Upon completion of disassembly all parts should be cleaned and visually inspected for cracks wear or distortion and any signs of overheating or mechanicalinterference a Rotor The rotor shou...

Page 394: ...gativediodesareopen and the alternator must berepaired or replaced 3 Normal indications are a low resistance bright test lamp when the positive test lead is at ground and a high resistance no light wh...

Page 395: ...windingswill usually cause the alternator to growl or benoisy duringoperation and willusually showsome signsof overheating If all other electrical checks are normal and alternator fails to supply its...

Page 396: ...l the slipringend bearingand oil seal Makesure the lip of the oilsealis toward the bearing Stake the seal in place Correct assembly of bearing seal inner race and spacerare as shown in Figure 11 13 f...

Page 397: ...connectingtest instruments except voltmeter or before removing or replacing any unit or wiring Accidental grounding or shorting at the regulator alternator ammeter or accessories willcauseseveredamage...

Page 398: ...lubricated whenever the alternator is disassembled The bearing should be thoroughly cleaned and repacked with ShellAlvania No 2 or an equivalent bearing lubricant The cavitybehind the bearingshould b...

Page 399: ...Do not run alternator more than two minutesfor each test point 11 17 CHECKING ALTERNATOR BELT TENSION If properly installed tensioned and checked periodically the alternator drive belt will give very...

Page 400: ...nsion accordingly TABLEXI II ALTERNATORBELTTENSION Widthof Belt 3 8 inch 3 8 inch Condition New Used Torque indicated at alternator pulley 11 to 13 ft lbs 7 to 9 ft lbs The higher tension specified fo...

Page 401: ...vel but must not be filled above the baffle plates A hydrometer check should be performed to determine the percent of charge in the battery Allconnectionsmust be clean and tight Refer to Table XI III...

Page 402: ...ccasionally to drain any accumulation of liquid or during cleaningof the box 11 29 REMOVALOF BATTERYBOX Refer to Figure 11 17 a Removebattery accordingto instructions in Paragraph 11 23 b Remove the t...

Page 403: ...MANUAL 2433 2 1 COVER BATTERY BOX 2 VENT TUBE 3 CAM LOKS COVER ATTACHMENT 4 BATTERY 24 VOLT 5 BATTERY BOX ASSEMBLY 6 STARTER SOLENOID 7 DRAIN 8 BATTERY RELAY Figure 11 17 Battery Box ELECTRICALSYSTEM...

Page 404: ...which is actuated by turning the master switchon Thebattery is disconnectedfrom the electricalsystem when the master switchis off 11 34 REMOVALOF BATTERYRELAY a Open access door on right side of fuse...

Page 405: ...tment clockwise f The regulator should be adjusted to 28 volts when controlling a load of 10 to 15 amps after one minute operation If the regulator does not regulate at 28 volts one of the followingco...

Page 406: ...rtain that the master switch is off before performing any work on the voltageregulatoror overvoltagerelay c Remove the bolts securing the voltageregulator 4 or overvoltagerelay 2 in placeand remove fo...

Page 407: ...COVER BAND 18 WASHER PLAIN 11 RETAINING STUD 19 WASHER LOCK 12 HEAD ASSEMBLY 20 NUT PLAIN 13 RETAINING PLATE 21 BEARING NEEDLE 14 THRUST WASHER 22 ARMATURE 15 BENDIX DRIVE SHAFT 23 SPRING SET 16 PIN...

Page 408: ...d Field Assembly the GearHousing and the BendixDriveAssembly Refer to Figure 11 19 11 40 OPERATION OF STARTING MOTOR When the starting circuit is energized battery current is applied to the starting m...

Page 409: ...stance connections that would affect starting motor efficiency This test is made with a low reading voltmeter while crankingthe engineor at approximately 100 amperes and the followinglimitsused 1 Volt...

Page 410: ...e pinion end of the shaft Removereduction gear woodruff key andsteel spacer from shaft c Turn the Bendix pinion until it locks in the extended position Locate spirol pin and use a punch to remove Slid...

Page 411: ...Removerust paint or greasefrom the mounting surfaces 11 50 BENDIXDRIVE Turn the Bendix pinion until it locks in the extended position Locate spiral pin and use a punch to remove Slidedriveassemblyoff...

Page 412: ...ck the bearing alignment and end play to make sure there is no binding or interference Two or three sharp raps on the frame with a rawhidehammer will often help to alignthe bearingsand free the armatu...

Page 413: ...s correctly adjusted internally 5 Check that the vibrator should buzz while cranking the engine The tone should change as the magneto breakers open If no buzzing check input voltage should be at least...

Page 414: ...ch lamp is controlled by a separate switchmounted on the switchpanel Referto Figure 11 1 The rocker type switchis also a circuit breaker rated at 20 amps for both the landing and taxi light 11 57 REMO...

Page 415: ...8B171 PAWNEE BRAVE SERVICE MANUAL MS35206 251 REF VIEW A WORKING MAIN WORKING LIGHTS INSTALLATION NAV LIGHT WII Figure 11 25a Night Working Lights Installation ELECTRICALSYSTEM ADDED 8 27 79 2G14...

Page 416: ...PAWNEE BRAVE SERVICE MANUAL B170 HOPPERLIGHTS Figure 11 25a Night Working Lights Cont ELECTRICAL SYSTEM ADDED 8 27 79 2G15...

Page 417: ...ntpanel contains threerocker typeswitches whichalso serveas circuit breakers and two 3 position rocker switches One rocker switch circuit breaker rated at 10amps activates the lamp switchingcircuitsan...

Page 418: ...ight to the wing tip 3 Remove the turn light from the wing tip and disconnect the wires from the light 4 Disconnect the wires from the relay 5 Remove the screws and washers securing the relay to its b...

Page 419: ...THIS PAGE INTENTIONALLY LEFT BLANK 2G18...

Page 420: ...60 DESCRIPTION The navigationlights arelocated on each wingtip and at the rudder tip The lights are controlled by a switch located on the lowerright handinstrument panel 11 61 REMOVALOF WINGNAVIGATION...

Page 421: ...to approximately 450 volts DC then discharged across the Xenon flash tube at intervals of approximately 50 flashes per minute The condenser is parallel across the Xenon flash tube which is designed t...

Page 422: ...36 8060001 AND 8002001 AND UP WING TIP LOOKING IN CONN E109 LEFT CONN El 10 RIGHT PART OFWING HARNESS CABLE WING STROBE CONN E113 CONN EIII WING STROBE CONN E112 L2F RIGHT PART OF WING HARNESS WHITE...

Page 423: ...he tube socket assemblyfor shorts 1 Disconnect the tube socket assembly of the anti collision light from the interconnecting cable 2 The followingcontinuity checkscan bemade with an ohmmeter 3 Check f...

Page 424: ...ocated behind the lower right portion of the instrument panel mounted to the tubular structure 11 72 STALLWARNINGHORN AND LIFT DETECTOR 11 73 DESCRIPTION This system consists of a lift detector which...

Page 425: ...orer of the detector plate If the stall warninghorn has been comingon too early slidethe unit down If the stall warninghorn has been comingon too late move the detector up Retighten the screwsafter ma...

Page 426: ...From behind instrument panelremove circuit protector from instrument panel c Disconnect electricalconnections fastened with screwsto the circuit protector NOTE Note the place from which each electrica...

Page 427: ...100APA 36 300 375 field circuit breaker SA field ter minals of master switch voltage regulator and al ternator field terminal Interruption of voltage through any of these points isolates the faulty co...

Page 428: ...depending on brush contact resistance Pullpropellerslowly by hand turning alternator rotor through 360 of travel CAUTION Turn magneto switchto OFF before turning propeller If resistanceis high checkbr...

Page 429: ...e bad wireterminals Openrectifier If any of the sixrecti fierspressed into the rear bellhousing of the alter nator open up internally it willresult in a def inite limitation on the current that canbe...

Page 430: ...ernator itself Checkbrush holders for shortingagainst frame If there areno obvious signs of a physicalshort circuit at fieldterminal or brush holder replace alternator Note Intermittent short circuit...

Page 431: ...illhold Replace component or wire which wasisolatedas defective See Figure 11 2 Shorted alternator diode Batteryinstalledwith re versedpolarity Battery chargedbackwards Disconnectwiringat bat tery pos...

Page 432: ...cannot occur in the airplane due to any fault in the al ternator system Replacevoltageregulator Excessiveresistancein field circuit Checkall connections and wireterminals in field circuit for deterio...

Page 433: ...ning in brushes then the brush should be properly seated by inserting a strip of number 000 sandpaper be tween the brush andcom mutator with the sanded sidenext to the brush Pullsandpaper in the di re...

Page 434: ...earing Disassemble clean in spect and relubricate replacingball bearingsif worn Sameelectricalcauses as listed under Motor failsto operate Sameremedieslisted for these troubles Excessivearcing of moto...

Page 435: ...d in wiring Broken cellpartitions Replacebattery Reset Removeand rechargebat tery if left in unused airplane 3 weeksor more Removeand recharge Replace Checkwiring Replace Batterylife is short Overchar...

Page 436: ...in adding water Vent lines leaking or clogged Chargingrate too high Repairor clean Adjustvoltageregulator Batteryfreezes Dischargedbattery Replace Wateradded and battery not chargedimmediately Alwaysr...

Page 437: ...auge Engine Gauges Down Relay Coil Up Relay Coil Flap Motor Fuel Pump Flap Lights Post Lights Compass 250 Watt Lamp White Tail Lights Red Nav Lights Green Nav Lights Horn Starter Solenoid 250 Watt Lam...

Page 438: ...ELECTRICALSYMBOLS 0 0 CIRCUITBREAKER RESISTOR LIGHT SWITCH SOLENOID DIODE WINGROOTCONNECTOR GROUND BUSBAR CONNECTOR BATTERY RHEOSTAT RHEOSTAT 0 0 0 SWITCH CIRCUITBREAKER DOUBLEPOLESINGLE THROWRELAY E...

Page 439: ...RFACE EO00 Series Behind Pilots Headrest FLIGHTINSTRUMENT G H L P Q LANDINGGEAR EIO Series Left WingRoute HEATER VENTILATING DEICING El02 Series Right Wing Route LIGHTING POWER E103 Series Left WingRo...

Page 440: ...PAWNEEBRAVESERVICEMANUAL STARTEF ENGINE GROUND BATTERY RELAY 5 A VOLTAGE REGULATOR AMMETER I MAIN BUS RETARD LEFT MAGNETO Figure 11 26 Alternator Starter Schematic PA 36 285only Revised 9 1 78 2H15 E...

Page 441: ...ANUAL 2B38 20A FUEL PUMP BYPASSVALVE N C HEATER FOR HOT PRIME PRIME SW S7 Figure 11 27 Fuel Pump Schematic PA 36 285only 2834 FLAPS FLAP SW I NOTE WIRE SIZE 14 FORPA 36 300 375 Figure 11 28 Flap Schem...

Page 442: ...rningSchematic PA 36 285Only Figure 11 29 Fuel Gauge Schematic STROBE LIGHT 5A TURN B BANK 1ANTI COLLISION LIGHT u a a a a o STROBE LIGHT Figure 11 32 Anti Collision Light Schematic For S N s up to 36...

Page 443: ...nding Light Schematic Figure 11 34 Taxi Light Schematic Figure 11 35 Anti Collision Rotating Beacon PA 36 300 S N 36 8060001 and up PA 36 375 S N 36 8002001 and up ELECTRICALSYSTEM Figure 11 36 Anti C...

Page 444: ...2838 PAWNEE BRAVE SERVICE MANUAL L2C Figure 11 37 Navigation Light Schematic INTENTIONALLY LEFT BLANK ELECTRICAL SYSTEM Revised 8 27 79 2H19...

Page 445: ...LAP LT CONN E107 PAWNEEBRAVESERVICEMANUAL 2836 INSTRUMENT LIGHTS Figure 11 38 Instrument Light Schematic CONN E106 Figure 11 39 Engine GaugeSchematic PA 36 285only Revised 8 27 79 ELECTRICALSYSTEM 2H2...

Page 446: ...G 5 AMP Figure 11 41 Figure 11 40 Agitator Motor TO FLAPACTUATOR SOLENOID I POWER Stall WarningSchematic PA 36 300and 375 RECEPTACLE MAIN BUS IN4719 BATTERY 24V N MASTER SWITCH Figure 11 42 AuxiliaryP...

Page 447: ...R SWITCH S3 ALTERNATOR FIELD 5 AMP ALTERNATOR OUTPUT 100 AMP STARTER 10 AMP LEFT MAGNETO RIGHT MAGNETO S4 LEFT MAG SWITCH RIGHT MAG SWITCH NOTE STANDARD 4 GAUGE WIRE USED ON S N s 8060001 ANDUP Figure...

Page 448: ...NUAL 2833 I 0130 ELECTRIC INSTRUMENTS 5 AMP ENGINE GAUGE UNIT n OIL TEMP SENSOR MS28034 1 Figure 11 44 Engine Gauge Schematic PA 36 300 and 375 2833 PRESSURE SWITCH S7 FUEL PUMP 10 AMP o FUEL PUMP SWI...

Page 449: ...SEE NOTE PAWNEEBRAVESERVICEMANUAL 2831 12VDC 12VDC Figure 11 46 Alternator Starter Schematic PA 36 375only Revised 12 10 79 ELECTRICAL SYSTEM 2H24...

Page 450: ...SUB PANEL RIGHT TIP LEFT TIP Figure 11 47 Night Lights First Option ADDED 8 27 79 211 212 ELECTRICAL SYSTEM...

Page 451: ...PAWNEE BRAVE SERVICE MANUAL HOPPER LIGHT SUB PANEL Figure 11 48 Night Working Lights Second Option ADDED 8 27 79 213 214 ELECTRICALSYSTEM...

Page 452: ...Y PUSHBUTTONS TOP LEFT NOTE WITH THIS INSTALLATIONONLY THE FIRSTOPTIONOF THE NIGHTWORK ING LIGHTS INSTALLATION IS AVAILABLE RIGHTTIP Figure 11 49 Wiring Schematic Electric Spray Valve and Night Workin...

Page 453: ...12 1 Autoflight 12 2 Emergency Locator Transmitter Narco 12 3 Description 12 4 Location 12 5 Battery Removal and Installation Narco 12 6 Testing Emergency Locator Transmitter 12 7 Inadvertent Activati...

Page 454: ...ry pack label If the transmitter has been used in an emergency situation before the time limit of the battery pack or it has more than one hour of accumulated test time the battery must be replaced ac...

Page 455: ...minals to the bottom of the circuit board i Reinsert the control head section into the battery pack being careful not to pinch any wires and replace the four screws If the four holes do not line up ro...

Page 456: ...ON OFF ARM SWITCH TO ON ANTENNA POPSOUT OF CHANNEL N AND DOWN TO EXTEND TO FULL LENGTH VIEW Figure 12 2 ELT Portable Folding Antenna Narco CONTACT SEPARATOR PORTABLE ANTENNA BLADE NOT MAKING CONTACT...

Page 457: ...monitored by the various FAA installations Before performing any operational test of the ELT the preceeding precautions should be observed a Tune the aircraft communications receiver to 121 5 MHzand s...

Page 458: ...h it will have to be reset If the ELT is accidentally turned on by hand it may simply be placed back to ARM by one of the following steps a Improper switch selection is corrected by rotating the switc...

Page 459: ...PAWNEE BRAVE SERVICE MANUAL THIS PAGE INTENTIONALLY LEFT BLANK 2113...

Page 460: ...M Aerofiche Paragraph Grid 13 1 Heating System 2115 13 2 Description and Operation 2115 13 3 Ventilation and Ram Air Pressurization 2115 13 4 Description and Operation 2115 13 5 Ventilation Air Filter...

Page 461: ...fer to Figure 13 1 The cabin ventilation system servestwo purposes Pressurization of the cabin and fuselageto help prevent dust and toxi fumes from entering the aircraft and ventilation for the pilot...

Page 462: ...ND 10 AIR DUCT HOSE 11 HEAT DUCT GUIDE 12 AIR DUCT HOSE 13 FITTING ASSEMBLY 14 CONTROL ASSEMBLY 15 SCOOP ASSEMBLY CABIN VENT SYSTEM 16 DIFFUSER ASSEMBLY OVERHEAD 17 CONTROL ASSEMBLY AIR VENT 18 HEADRE...

Page 463: ...THIS PAGE INTENTIONALLY LEFT BLANK 2117...

Page 464: ...Pump 2J9 14 12a Installation of Hydraulic Pump 2J9 14 13 Repair and Replacement of Hydraulic Spray System Components 2J9 14 14 Adjustment of Pump Fan Blades 2J 10 14 15 Fan Brake Control 2J10 14 16 Em...

Page 465: ...ubtank Gate Seal 2J20 14 36 Adjustment of Subtank Gate Control 2J21 14 37 Agitator Assembly 2J21 14 38 Removal of Agitator Assembly 2 2J21 14 39 Installation of Agitator Assembly 2K1 14 40 Agitator Co...

Page 466: ...t the controls are not damaged and operate properly without binding or lost motion and are riggedaccordingto the instructions in thissection of the servicemanual b Inspect the system for any traces of...

Page 467: ...such as cracks or punctures may be repaired Repairs made to the hopper must restore at least the originalstrength to the repaired area The materials needed to make the repair are glass cloth Burlingto...

Page 468: ...aximumgel time of 8 hours NOTE Hopper installation must be completed before the bedding mixture beginsto gel f Extrude a bead approximately 0 75 inch in diameter 17 00 50 inch in length into the requi...

Page 469: ...EAR 10 VENT ASSEMBLY 11 ATTACHMENT SCREW 24 REQ SIDES 12 SPRING MAIN GEAR 13 BOLT ASSEMBLY GEAR SPRING MOUNTING 14 BOLT ASSEMBLY HOPPER MOUNTING 4 REQ 15 BRACKETS HOPPER MOUNTING 16 BOLT ASSEMBLY HOPP...

Page 470: ...VENT ASSEMBLY 11 ATTACHMENT SCREW 24 REQ SIDES 12 SPRING MAIN GEAR 13 BOLT ASSEMBLY GEAR SPRING MOUNTING 14 BOLT ASSEMBLY HOPPER MOUNTING 4 REQ 15 BRACKETS HOPPER MOUNTING 16 BOLT ASSEMBLY HOPPER MOUN...

Page 471: ...7 CLIP HOPPERDOOR RESTRAINT 8 DOORASSEMBLY 9 PLATEASSEMBLY DOORLATCH 10 ROD HOPPERDOORLATCH 11 ARM ASSEMBLY HOPPERDOOR 12 BOLT WASHERAND SELF LOCKING NUT 13 HANDLE 14 ADHESIVE SEALANT 15 SEAL SPONGEV...

Page 472: ...valve boom and nozzleassemblies and combination pressureand vacuum gauge Figure 14 4and 14 4adisplay the two types of systems offered The twospray systemsavailableare winddrivenand hydraulicallydrive...

Page 473: ...ss 14 llc REMOVAL OF HYDRAULIC MOTOR AND SPRAY PUMP ASSEMBLY Refer to Figure 14 4a a Ensure the spray systemis evacuatedof any harmful chemicals and wash downall affectedunits b Disconnect and remove...

Page 474: ...PAWNEE BRAVE SERVICE MANUAL 2407 SEAL VIEWA A BEDDING TUBE ASSEMBLY TUBE 3 0 12 HEAT L Figure 14 3 Hopper Bedding Tube Installation 2J4 DISPERSAL SYSTEMS Revised 1 28 76...

Page 475: ...ONTROL VALVE 8 CENTER TUBE 9 CENTER BOOM ASSEMBLY 10 QUICK LOADER VALVE 11 CONTROL ASSEMBLY SPRAY VALVE 12 ROD ASSEMBLY SPRAY CONTROL 13 OUTBOARD SPRAY BOOM 14 NOZZLE ASSEMBLY 15 STRUT ASSEMBLY 16 PRE...

Page 476: ...E 8 ELECTRIC VALVE ASSEMBLY 9 RELAYS 10 RESISTORS 11 CIRCUIT BREAKER 12 SPRAYPRESSUREGAUGE 13 SPRAYPRESSUREADJUSTMENT 14 SWITCHASSEMBLY 15 HOPPERLOADING INLET VALVE 16 SPRAYBOOM 17 SPRAYNOZZLES 18 STR...

Page 477: ...PASS HEAT EXCHANGER I I I RELIEF VALVE NEEDLE VALVE BALL VALVE SHAFT SEAL DRAIN BOOM PRESSURE CONTROL KNOB SYSTEM ON OFF KNOB HYDRAULIC MOTOR NOTE Refer to Lubrication Chart for type of Hydraulic Flui...

Page 478: ...OLTS 5 OUTER BEARING PUMP 6 INNER BEARING PUMP 7 PUMP BODY 8 IMPELLER 9 IMPELLER HOUSING 10 EMERGENCY SHUTOFFVALVE 11 UPPERGATEHOUSING 12 GATE 13 LOWERGATEHOUSING 14 GATERETURN SPRING 15 GATESHAFTBEAR...

Page 479: ...p 7 Shut the engine down and inspect for leaks 8 Check the fluid levelin the reservoir and refill if necessary 9 Reinstall belly and side panels 10 Reconnect spray hoses 14 12 REMOVAL OF HYDRAULIC PUM...

Page 480: ...anent damage may beincurredin the adjusting mechanism The optimumfan bladepitch position is onethat providesa boompressure slightlyabovethe desiredworking pressure at working airspeed with the spray v...

Page 481: ...9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 32A 32B PAWNEE BRAVE SERVICE MANUAL 2596 I Figure 14 5 Air Driven Spray Pump and Control Valve Installation Revised 9 1 78 DISPER...

Page 482: ...top push button opens thevalve and the sidepush button closesthevalve Thevalveoperates veryrapidly and it isonlynecessaryto push the desiredbutton for approximatelyone secondor lessto operatethevalve...

Page 483: ...bing consists of tubular aluminum and hose connections that allow liquid chemicalsto be pumped from the hopper through the spray control valveto the center boom and strainer then to the outer booms an...

Page 484: ...R BOOM ASSEMBLY 5 BRACKET 6 COUPLING 7 CLAMP 8 SAFETY WIRE 9 STRUT ASSEMBLY 10 BOLT ASSEMBLY 11 OUTER BOOM ASSEMBLY 12 FITTING 13 OUTBOARD STRUT ASSEMBLY 14 CAP 15 AIR BLEED TUBE 16 RIGIO TUBES OVER F...

Page 485: ...raft d Disconnectand remove the outboard strut assemblyfrom the aircraft e Remove the center boom by disconnecting the tube at the pressuregaugefitting on the fuselage bottom and install a cap on the...

Page 486: ...spray control valve to the outer booms The vacuum side of the gauge 0 30 scale indicates negative pressurein the spray boom created by the back suctioneffect of the liquid recirculating through the sp...

Page 487: ...2364 15 Figure 14 9 Quick Loading System Installation PAWNEE BRAVE SERVICE MANUAL REVISED 1 19 78 2J17 DISPERSAL SYSTEMS...

Page 488: ...ray pump Whensprayingchemicalswithhighparticulate concentrationor the tendencyto gum besure to cleanthe shutoff valve thoroughly Actuate the valve several timeswhileflushingthe systemwith water If the...

Page 489: ...KAGE ASSEMBLY S TUBE ASSEMBLY 6 UPPER ARM ASSEMBLY 7 LOWER ARM ASSEMBLY 8 CAP PLUG 9 CLEVIS 10 JAM NUT 11 CLAMP 12 PIN 13 BUSHINGS 14 CONTROL ASSEMBLY IS BRACKET ASSEMBLY 16 TY SM TY RAP 4 PLACES Figu...

Page 490: ...tallation g Clean and inspect parts for wear pay particular attention to the condition of the rubber boot on the fuselagebottom A defectiveboot could allow chemicalsto enter the fuselage h Reinstallth...

Page 491: ...subtank flange so that a piece of paper will just slide between them 6 Tighten the backup to within a quarter turn after surface contact 7 Push on the hinge links until they travel overcenter and loc...

Page 492: ...1 GASKET HOPPER ASSEMBLY REAR 32 GASKET HOPPER ASSEMBLY FRONT 33 PLUG 34 SUBTANK ASSEMBLY HOPPER 35 GATE ASSEMBLY HOPPER 36 SEAL HOPPER GATE 37 RETAINER ASSEMBLY HOPPER GATE 38 1 BOLT ASSEMBLY 39 BUSH...

Page 493: ...CE MANUAL 1 SUBTANK 2 GATECONTROL ROD RODEND 3 BACKUP NUT 4 SUPPORT NUT 5 RUBBER GATESEAL 6 BACKUP NUT 7 SUPPORT NUT 8 HINGEBOLT Figure 14 12 Adjustment of Subtank Gate and Control Revised 10 27 82 2J...

Page 494: ...TING BRACKET 6 PACKING SEAL 7 BEARING 8 NUT 9 NUT 10 SHAFT COUPLING BOLT 11 DRIVE SHAFT 12 MOUNTING BRACKET 13 MOUNTING BRACKET 14 SUBTANK 15 LEAFSPRING 16 SWITCH 17 HANDLE II AGITATOR GUIDE 19 AGITAT...

Page 495: ...ontrol switch is located in the console and is activated through a leaf springby the subtank gate control handle Operatingthe gate control automatically activates the switch No adjustment is provided...

Page 496: ...3 AGITATOR DRIVECONTROL SWITCH 4 SUBTANKGATECONTROL HANDLE 5 SPREADER 6 LATCH 7 QUICKRELEASE FASTENER 8 SUPPORT FLAPARM 9 LATCHASSEMBLY 10 SPREADER SUPPORT 11 LOCKPIN Figure 14 14 Dry Material Spreade...

Page 497: ...6649 33 will not fit on new or modified hubs and new blades P N 66490 will not fit on old hubs unless the hub has been modified per Agrinautics Service Bulletin No SB76 3 I HYDRAULICALLY DRIVEN SPRAY...

Page 498: ...47 INSTALLATION OF SUBTANK a Remove all traces of gasket and sealing compound from the hopper and subtank mating surfaces b Apply Permatex 2 sealing compound to the mating surfaces of the hopper and...

Page 499: ...2K5 THRU 2L24 INTENTIONALLYLEFTBLANK 2K5...

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