Allis-Chalmers HD-9 Service Manual Download Page 140

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Summary of Contents for HD-9

Page 1: ...SERVICE MANU L FOR DEL HD9 TRACT R 1955 PROPERTY OF LITHO N U S A 3 ...

Page 2: ...ustment and repair or rebuilding of these assemblies Section XX describes the Special Equipment available for the tractor and outlines the service of these parts General Maintenance Instructions are given in Section XXI and Fits and Tolerances in Section XXI Trouble Shooting Information given in Section XXIII will aid in deter mining the cause of operating irregularities and tells what may be done...

Page 3: ...ctrical System 104 Instruments 112 Engine 115 Engine Clutch and Clutch Brake 174 Transmission and Bevel Gear 187 Steering Clutches and Controls 208 Steering Brakes 219 Final Drives 224 Truck Frames 241 Draw Bar 259 Tracks 261 Main Frame and Equalizer Spring 266 Fender and Seat Group 270 Special Equipment 272 General Maintenance Instructions 282 Fits and Tolerances 287 Trouble Shooting 295 Special ...

Page 4: ... the bevel gear through two multiple disc steering clutches one on each side of the bevel gear shaft to the final drives and the track drive sprockets The transmission provides 6 forward speeds rang ing from 1 4 M P H in low gear to 5 7 M P H 6 in high gear and 3 reverse speeds ranging from 1 6 M P H in low reverse to 4 4 M P H in high reverse under full governed engine speed of 1600 R P M Mechani...

Page 5: ...BACK TRUCK WHEEL OUTER TRACK SUPPORT EXHAUST STACK AIR PRE CLEANER RADIATOR CAP HEADLIGHTS RAI IArOR GRillE HOOK GUARD L ______________ Fig I Model HD 9B Tracfor ______________ J 7 ...

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Page 7: ...ngine Speed GEAR RANGE SPEED lst Gear 1 4 M P H 2nd Gear 2 1 M P H 3rd Gear 2 9 M P H 4th Gear 3 8 M P H 5th Gear 4 4 M P H 6th Gear 5 7 M P H 1st Reverse 1 6 M P H 2nd Reverse 3 5 M P H 3rd Reverse 4 4 M P H ENGINE Make IIGeneral MotorsN Diesel Y b i Cyii d r aCy l Bore 41 1 in Stroke 5 in Piston Displacement 2B4 cu in Engine Speed governed at full lood 1600 R P M lubrication Forced Feed Foel Use...

Page 8: ...e Proper operation and maintenance of the engine are necessary to obtain the desired results from the lubricating oil B Transmission and Final Drive Lubricant Lubricate these assemblies with any good grade 10 of engine lubricating oil purchased from a reputa ble oil company Use oils of the following viscosities Atmospheric Temperature Viscosity Above 32 F Use SAE 50 320 F and below Use SAE 30 C Tr...

Page 9: ...small quantities are largely responsible for harm ful internal engine deposits The fuel must also be 11 free from alkali and mineral acids Proper burning characteristics are dependent upon ignition quality and volatility All fuels meeting the requirements of the No 1 0 and also the lighter types of fuel in the No 2 D grade of ASTM D975 DIESEL Fuel Oil Specifica tions are satisfactory The more vola...

Page 10: ... a pump and draw the fuel from the container rather than to drain it from the bollom of the container Where conditions are such that drums must be used to supply fuel it is advisable to have enough drums to allow sufficient time for the fuel to sellie The fuel should be used only to within about three 3 inches from the bottom of the drums The fuel thus left in a number of drums can be collected in...

Page 11: ...rly identify the particular machine and will assure obtaining the correct replacement parts for it The tractor serial number is stamped in the rear 13 face of the steering clutch housing near the upper right corner and is also stamped on a serial number plate attached to the cowl The engine serial number is stamped on the upper right side of the cylinder block below the governor control housing ...

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Page 13: ...ors As the fuel enters each injector it passes through a small porous metal filter in the injector body The amount of fuel required by the engine is injected into the cylinders by the injectors surplus fuel not required for combustion leaves eoch injector through an other porous metal filter enters the return fuel manifold and is returned to the fuel tank A pres sure of 20 to 55 pounds is maintain...

Page 14: ...ghtening any loose fuel lines and filter connections between the fuel tank and the fuel pump Start the engine and test for smooth operation and full flow of fuel If the fuel lines or filters are clogged clean the first stage or second stage fuel filter or both in stall new elements and blowout the lines while they are disconnected This should eliminate the difficulty Check for full flow of fuel af...

Page 15: ...is elbow before the engine is storied at the beginning of the day s operation in worm weather or shortly after the end of the day s operation in freezing weather close the drain cock when clean fuel runs out Drain and flush the fuel tonk if a large accumulation of rust and scale is evident B Maintenance If a large accumulation of rust or scale in the fuel tank becomes apparent remove the drain plu...

Page 16: ...rant or when the filter ele ment becomes clogged A clogged filter element is usually indicated by irregular engine performance c Replacement of First Stage Fuel Filter Element 1 Close the fuel tank shut off valve 2 Thoroughly clean the filter cover and the surrounding area Loosen the drain cock lo cated in the bottom of the filter shell and allow the filter to drain 3 Loosen the cover screw and re...

Page 17: ...by loosening the shell retaining nut 19 ______ SCREW GASKET VENT SCREW n iJ RETAINING NUT GASKET SHEIL RETAINING 0 NUT FUEL FilTER FILTER ELEMENT ELEMENT SEATING SEATING PLATE PLATE GASKET ELEMENT s METAL WASHER GASKET __ Fig 7 Second Stage Fuel filter Details 3 Remove and discard the Alter element Re move the centering guide element seating plate seating plate gasket metal washer and element spri...

Page 18: ...er or shortly after the end of the day s op eration in freezing weather and allow the water or sediment to drain Tighten the drain plug when clean fuel runs out Remove and discard the old fllter element and install a new one after every 300 20 to 500 hours of operation or when the fuel pressure drops below 20 pounds per square inch A VENT PLUG I I I I GASKET REINFORONG I PLATE FUEL FILTER HOUSING ...

Page 19: ... gears revolve inside the pump housing to create a vacuum in the intake chamber thus drawing the fuel from the fuel tank The fuel is carried around the gears in the spaces between the teeth and is forced out of the pump under pressure The pump driving gear is mounted on a free floating type driving gear shaft and is attached to the shaft by a shear pin The pump driven gear is supported in the bore...

Page 20: ...mp housing 2 Holding the pump assembly in the hand tap the heads of the capscrews with a soft hammer separating the pump stotor and the pump housing CAUTION DO NOT PRY PUMP STATOR AND PUMP HOUSING APART 3 Remove the driven gear from the pump housing 4 Remove the pump driving gear shaft and driving gear from the pump stator carefully to prevent damage to the oil seals 5 Remove the dowel pins if nec...

Page 21: ...ator with the sealing edge of the oil seal toward the pump housing 23 2 Install the outer oil seal in position in Ihe pump stator with the sealing edge of the oil seal toward the coupling end of the pump 3 lubricate the driving gear shaft and the oil seals and install the shaft with driving gear in place in the pump slator Push the shaft through the oil seals being careful not to CaUse damage to t...

Page 22: ... KVIJ I INJECTOR SEAL o FOlLOWER SPRING equipped with 55 cu mm fuel injectors The Model HD 9G Tractors prior to Serial No 2698 are also equipped with 55 cu mm fuel injectors The 55 cu mm injectors are identified by an orange colored injector identification tab marked 55 However effective with HD 9G Tractor Serial No 2698 all HD 9G Tractors are equipped with 70 cu mm fuel injectors The 70 cu mm inj...

Page 23: ...or plunger into the recess between the upper helix and the lower helix from which it can still flow 25 back into the supply chamber until the upper helix closes the upper port At this point both the upper and the lower ports are closed and the fuel re maining under the injector plunger is then forced through the spray tip into the combustion chamber The rotation of the plunger by changing the posi...

Page 24: ...ine with the start er until the rocker arm clevis pins at push rod end of arms are in line then turn the rocker shaft bracket bolts out of the cylinder head and swing the rocker arm assembly away from the injector and valves CAU TION Push rods may be bent if the upper 26 ends are not aligned when swinging the rocker arm assembly away from the injector and yalves 4 Remove the nut from the injector ...

Page 25: ...1 Place the injector in an injector holding fix ture and place Ihe fixture in a vise with the spray tip end of the injector down Make sure the injector control rack is not bound or bent when clamped in the fixture loosen but do not remove the two injector filter caps 2 Using a screwdriver as shown in Fig 15 raise the follower spring and at the same time hold down on the top of the plunger follower...

Page 26: ...lly lapped therefore if any of the internal working parts of the injector are scored or dam aged they are unfit for further use and must be replaced After the injector has been disassembled and all the parts carefully cleaned in carbon tetrachloride or fuel they should be protected from dirt by stor ing in clean fuel until the injector is reassembled 1 Reaming Injector Spray Tip Insert the reamer ...

Page 27: ...cing of the lapping blocks will produce top quality work it is advisable to have two grooved lapping blocks on hand and maintain their surfaces flat and free from worn or low spots To remove these spots hand lap one lapping block on an other using fine grain lapping compound Protect the lapping blocks when not in use against dust and damage by enclosing them in a close fitting wooden container 3 i...

Page 28: ...d in the same cavity from which it waS re moved Even though the filters may have been washed as thoroughly as possible and dried with compressed air particles of dirt may remain in them that would be washed into the iniector and cause damage jf the filter removed from the outlet side is installed in the inlet side If the filters hove been mixed the out et fiUer can usually be identified by its be ...

Page 29: ...wo marked teeth on the control rack c Insert the gear retainer down on top of 31 the gear and place the bushing in posi tion on the gear retainer with the locat ing pin in the bushing inserted into the slot in the injector body d Place the injector body in on injector holding fixture and clomp in a vise with the bottom end of the injector up Use care and do not bind or bend the control rack in the...

Page 30: ... STOP Fig 21 55 Cu Mm Fuel Injector Details Injector Identified by ORANGE Tab Marked 55 IDENTIFICATION TAB fiLTER Fig 22 70 Cu Mm Fuellnjecfor Details Injector Identified by BLACK Tab Marked 70 SPRAY k SEAL RING INJECTOR NUT fiLTER SPRING GASKET FILTER CAP SHIPPING CAP FOLLOWER SPRING PlUNGER J 7 CONTROL RACK SPill DEflECTOR PLUNGER INJECTOR BODY VALVE SPRING CHECK VALVE SPRAY TIP STOP PIN GEAR Re...

Page 31: ... held in position with the tool screw the in jector nut onto the injector body making certain that the valve assembly has not 33 shifted Do not force the injector nut even by hand while screwing it onto the injector body The injector nut can be turned down within 1 16 of the shoulder of the injector body with the thumb and finger if the valve assembly is lined up properly If the shoulder in side t...

Page 32: ...foreign par ticles in the fuel or on the injector parts that might prevent proper operation The test is made as follows 1 Place the injector in an injector holding fix ture and clamp in a vise Screw the bolt of the popping tool into the tapped hole in the holding fixture and tighten the lock nut In troduce dean fuel into one of the injector openings in the filter caps by means of an oil can until ...

Page 33: ...in 50 seconds on a new injector or the same drop in 35 seconds on a used injector is permissible When checking the pressure drop fot the 70 cu mm injectors a drop not 35 to e ceed 200 pounds from 750 to 550 in 50 seconds on a new injector Or the same drop in 35 seconds on a used injector is per missible If the injector functions satisfaclorilythrough out the above test it has been properly re cond...

Page 34: ...roper time 2 To Time Fuel Injectors a With the engine stopped remove the air pre cleaner engine hood and rocker cover b Make certain that the engine shut off knob is pulled back to the OFF posi tion Rotate the engine with the starter until the two exhaust valve rocker arms for the same cylinder are down and the valves are fully opened c Use the correct timing gage gage stamp 36 ed 1 484 for 55 cu ...

Page 35: ...tion and pull the throt tle lever all the way back wide open e Push the control tube lever toward the water manifold as for as possible and hold it firmly in that position f Use a medium sized screwdriver and turn down the inner adjusting screw on the No 1 rack control lever until the No 1 injector control rack moves in as for as it will go At this point a slight pressure will be felt on the contr...

Page 36: ...Section IX 2 Remove the rocker shafts rocker shaft brock ets ond unscreW the rocker arms from the push rods Remove the exhaust valves refer to EXHAUST VALVES AND OPERATING MECHANISM in Section IX 3 Remove the fuel injector from the cylinder in question refer to INJECTOR REMOVAL in this section 4 Support the cylinder head top side up on blocks and screw the special tap down into the upper end of th...

Page 37: ...of the driver extending through the opening at the lower end of the copper tube b Place the spinning die over the threaded end of the driver as shown in Fig 33 c Install the bearing above the spinning die and start the nut d While maintaining light tension on the nut gently top on the large end of the driver to firmly seat the copper tube and upset the small end of the tube e Place a 002 feeler ga...

Page 38: ...inder head and turn the feed screw down FINGER TIGHT ONLY c Using cutting compound consisting of equal paris of cutting oil and kerosene ream the bevel seat in the capper tube for the injector nul so that the shoulder of the injector spray tip will be flush with the bottom surface of the cylinder head Fig 36 Check the depth of the cut during the reaming operation by install ing an injector in the ...

Page 39: ...ect the leak Clean the fuel manifold and the fuel connector thoroughly after this operation 41 to prevent any of the lapping compound from en tering the injectors Use new copper washers under the fuel connector lock nuts when installing the manifold C Removal of Fuel Manifolds Refer to Fig 38 for relative location of parts Either manifold may be removed separately and without removing the cylinder...

Page 40: ...ure leak proof joints 4 Tighten the fuel connectors equally and se cure the lock nuts against new copper wash ers The lock nuts are special containing 42 fiber inserts which seal the threads against leakage When a new lock nut is to be in stalled first turn it onto the fuel connector so that the fiber end of the nut is down Turn it on until threads are cut through the fiber and then remove the nut...

Page 41: ...Pre Cleaner 2 Air Cleaner 3 Air Inlet Elbow and Air Shut Off Valve 4 Blower 5 Blower Drive Assembly Air Box and Cylinder Liner Air Ports Cold Weather Engine Primer 6 7 8 1 DESCRIPTION OF SYSTEM VALVE ROCKER ARM HAUST VALVES ROTOR __________ Fig I Air Flow Through Engine ___________ 43 I ...

Page 42: ...within the cylinders is absorbed by the pistons and the cylinder walls This heat loss and the re duced cranking speed may reduce the temperature of the air in the cylinders to a point too low to ignite the fuel A Cold Weather Engine Primer is provided as an aid for starting the engine in cold weather The Cold Weather Engine Primer is pro vided to inject starting fluid ethyl ether into the blower a...

Page 43: ...awn through the air cleaner a portion of the oil in the oil cup is drawn up into the screen mats and the oir passes on through the mats to the blower The oil with which the mats are saturated collects the dust from the air and in dripping back into the oil cup corries the dirt with it and deposits it in the cup Thus only dean air enters the blower for delivery to the cylinders B Air Cleaner Servic...

Page 44: ...lvent Remove the air pre cleaner from the top of the air clean er and swab out the air cleaner pipe Install the air pre cleaner assembly 3 Install the air baffle in the oil cup and fill the cup to the proper level with clean oil Be sure that the gasket above the oil cup is in good condition Install the cup on the bottom of the air cleaner body 4 Once or twice a year remove the air cleaner from its...

Page 45: ...t off valve swivel lever pin located at the front end of the engine shut off front rod This swivel lever attaches Ihe engine shut off front rod to the air shut off valve lever Push the en gine shut off front rod toward the engine rocker cover to uncouple the swivel lever pin from the air shuf off valve lever 2 loosen the Iwo 2 hose clamps on the air cleaner hose and move the hose onlo the air inle...

Page 46: ...eal and is 1101 crimped when installed olherwise air will be drown inlo the system withoul lrst passing through the air pre cleaner and Ihe air cleaner 8 Insert the air shut off valve swivel lever pin located on the front end of the engine shut off front rod into the hole in the air shut off valve lever and install the plain washer and the cotter pin Install the air shut off lever spring and the s...

Page 47: ...ts to support the rotors The blower rotors are timed by the two gears located on the rear end of the rotor shafts This timing or spac ing must be correct otherwise the required clear ance between the rotor lobes will not be main tained 49 Normal gear wear causes a decrease of ratar to rotor clearance on one side of the rotor lobes When this occurs clearance between the opposite sides of the rotor ...

Page 48: ...LOWER DRIVE a Operate the engine at approximately 50 300 R P M by manual control of the in jector control tube A worn drive cou pling will cause a loose rattling sound within the blower b Stop the engine Grasp the top rotor firmly and attempt to rotate it The rotors should move from Va to measured at the lobe crown and should have a springing action When released the rotors should move back at lea...

Page 49: ...Ihe blower air in take housing 51 9 Remove the capscrews attaching the blower air intake housing to the blower and remove the housing and the blower screen from the blower 10 Remove the capscreWs attaching the blower to the cylinder block Raise the front end of the blower slightly to clear the water pump to oil cooler connection and move the blow er assembly including accessories toward the front ...

Page 50: ...spec tive location when the blower is reas sembled 6 Remove the three 3 capscrews attaching each bearing retainer to the end plates and remove the bearing retainers 7 Remove the end plates and rotors from the blower housing In most cases the end plates and rotors are removed from the housing by pushing the rotor shafts from the rotor shaft rear bearings then withdrawing the rotors still assembled ...

Page 51: ...in clean solvent and dry with compressed air 1 Wash the rotor shaft bearings by rotating them in a pan of clean solvent or fuel until they are free from grease and oil Blow the dirt and fuel from the bearings with dry compressed air while rotating the bearings by hand CAUTION Do nof spin the bear ings with air pressure Repeat the cleaning operation until all foreign substance has been removed Afte...

Page 52: ...d gen eral condition The wear on the gears can be checked only with the blower assembled and the gears installed Install new gears if the backlash between the gears exceeds 004 F Assembly of Blower After all of the blower parts have been inspected and the worn or damaged parts replaced assem ble the blower by reversing the disassembly pro cedure and using the special tools illustrated as follows 1...

Page 53: ...The top of the blower housing can be identified by the flange extending across the entire length of the housing IMPORTANT In the following instructions the left hand end of the blower housing when viewed from the cylinder block side will be con sidered the front end or water pump drive end With the above identification in mind attach the fronl end plate to the fronl end of the blower housing as fo...

Page 54: ... the blower housing and with the omitted serrations in each rotor 56 ROTOR SHAH Fig I i Installing Blower Rear End Plate shaft facing the top of the blower housing as explained previously in step 3 place a rotor shaft oil seal installing tool on the gear end of each rotor shaft then install the rear end plate in the same manner as the front end plate was installed Fasten the rear end plate to the ...

Page 55: ... the omitted serrations to assist in locating the gears an the shafts 57 c Place the retaining washer on the upper gear capscrew and the fuel pump drive coupling disc on the lower gear cap screw draw the gears tight against the shoulders of the rotor shafts by the means of the gear capscrews Place a cloth be tween the gears to prevent their turning Both gears must be pressed on evenly and at the s...

Page 56: ...ribbon through the opening in the cylinder block side outlet side of the blower housing and 58 SIDE ClEARP NC HERE fig 17 Measuring I oinl for Clearance Belween Rotor Lobes down between the lobes at this point cen Fig 16 Turn the rotors and toke measurements at the mid section and at the opposite end of the lobes Record the minimum clearance obtained Measure the clearance between the second and th...

Page 57: ...ance Between End of Rotor and End Plate is required between the rotor lobes and the inside of the housing when measuring from the outlet side and a minmum clearance of 016 is required when measuring from the inlet side These clearances will be correct if the work was done carefully when assembling the blower If the work was done care lessly the assembly operation may have to be repeated 8 After th...

Page 58: ...wer assembly in position on the cylin der block inserting the front end of the blower drive shaft into the blower rotor driv ing hub Rotate the rotors by hond until the 60 serrations of the blower drive shaft can be felt entering the serrations in the blower drive gear coupling cam 6 Properly locate the blower on the cylinder block and install the attaching capscrews and plain washers Tighten the ...

Page 59: ...onnect each end of the oil pipe extend ing from the cylinder block 10 the blower drive support The oil pipe will be freed from the elbows when the support is with drawn from the flywheel housing Remove the engine crankcase oil level dipstick and the oil level dipstick tube 2 Remove the nuts and lockwashers from the four bolts that extend th rough the flange of the blower drive support and through ...

Page 60: ...support and bush ing assembly must be installed These bushings are bored in line therefore in case of a bushing fail ure the blower drive support assembly must be replaced Check the inside diameter of the bushings for wear and roundness and the outside diameter 01 the blower drive gear hub for Wear The proper clear ance between the bushings and the hub is 001 to 002 and must not exceed 005 If meas...

Page 61: ...mp in the bore of the cam and over the outside of the coupling support compress the spring bank enough so that the other bank of coupling springs may be installed Inslall the other two 2 half round coupling spring seats in position and install the other bank of coupling springs Remove the C damp 6 Place Ihe coupling supporl with cam and springs in position on the blower drive gear so thai the lobe...

Page 62: ...liner These holes or air ports must be kept open to allow free passage of air into the cylinders Inspection for the condition of the air ports should be made at frequent inter vals at least ever 500 hours of engine operation as hard carbon or sludge will build up in the air ports and restrict the passage of air Remove the hand hole covers from the left side of the cylinder block to inspect the air...

Page 63: ...aining ethyl ether starting fluid a primer pump to force the fluid through a small nozzle and into the blower air intake housing a primer elbow assembly and the necessary lines to complete the system The primer pump is mounted in the left side of the instrument panel and the dispenser assembly is attached to the cowl to the right of the instrument panel The starting fluid is forced through the pri...

Page 64: ...knob in run position 011 the way forward and with the throttle lever pulled all the way back and does not start after two or three strokes of the primer pump it is advisable to stop cranking and inspect the primer system for possible causes of failure Check the primer system as follows 66 FISTON ASSEMIIlV lSTO Rlt G c WASH iil _ H XNUT FlU1P UNf As srMS Y li II P _ tllm I NOZZLE i IIRlI IN nuow Fi...

Page 65: ...ill prevent the pump from operating properly When this occurs re move the spring retainers springs and balls from the inlet and outlet porls of the pump Inspect the balls ball seats and springs for wear or damage Clean the pump barrel and all components thoroughly and reassemble using new parts where necessary 4 Clogged Dispenser Strainer A strainer is attached to the plug which is screwed into th...

Page 66: ...rm weather operation A rust inhibitor soluble oil is available from Allis Chalmers Dealers and should be added in proportions of one pint of soluble oil to every 15 quarts of water The use of water containing lime will result in lime deposits in the cylinder head and cylinder block causing hot spots in the engine and eventually restricting the water passages Alkali in the water will couse a corras...

Page 67: ...ugh the engine oil cooler When the coolant within the engine reaches approxi mately 1600 F the thermostat opens and allows the coolant to circulate through the radiator Air in the cooling system is vented through a vent cock located in the top of the thermostat housing Three drain cocks one in the bottom of the ther mostat housing one in the bottom of the water pump housing and one in the bottom o...

Page 68: ...ns or inhibitors with any cleaning neutralizing or flushing compounds 2 FLUSHING If the tubes in the radiator be come dogged the obstructions may some times be removed by reverse flushing of the 70 radiator When the clogging is caused by leaves or other trash this material is usually deposited at the tops of the radiator tubes Disconnect the radiator outlet hose lower hose and using a suitable ado...

Page 69: ...radiator outlet elbow to the rad iator 4 Support the radiator and remove the four 4 capscrews and plain washers attaching 71 RADIATe SHELL RADIATOR CAP each side of the radiator to the radiator shell Remove the radiator from the shell as shown in Fig 4 5 If it is necessary to remove the radiator shell proceed as follows a Remove the air pre cleaner and the en gine hood Remove the bolts attaching t...

Page 70: ... radiator A bronze impeller is pressed on and pinned to one end of a case hardened steel pump shaft and a pump shaft coupling with an oil slinger is pressed on the opposite end The oil slinger shrouds the inner end of the pump body flange to prevent oil from creeping along the pump shaft and through the pump shaft bearing The pump shaft is sup ported at the drive end by a sealed double row combina...

Page 71: ...SCREW i PULLER LEG llii _ is necessary place a press as shown in Fig 6 73 and press the pump shaft from the pump shaft coupling The pump shaft coupling is pressed on the pump shaft and is driven solely through the press fit The metal stretches when the coupling is pressed onto the shaft and if the coupling is repeatedly removed and installed the bore coupling will become enlarged causing a loose f...

Page 72: ...ing a center punch stake the flange of the pump body against the end of the bear ing outer race in three or four places to pre 74 vent the bearing from moving endwise in the pump body 2 Install the seal assembly in position on the pump shaft Start the impeller on the end of the pump shafl position the impeller so the hole in the shaft lines up with the hole in the impeller Support the other end of...

Page 73: ... each exhaust port enters the water manifold which is attached to the cylin der head A gradually increasing area in the mani fold from the rear end terminates in a flange at the front end of the manifold where the thermostat housing is attached Unrestricted flow of coolant through the circulating system is accomplished by the use of a thermostat so positioned that when the thermostat is closed the...

Page 74: ...aner engine hood and the exhaust mumer 3 Disconnect the thermo gage from the rear of the water manifold Remove the four 4 capscrews attaching the water manifold outlet elbow to the front of the water mani fold and remove the elbow and the ther 76 mostat 4 Remove the nuts and lockwoshers attoching the waler manifold to the cylinder head and remove the manifold Remove the manifold gaskets Clean all ...

Page 75: ...djust the fan Belts 1 loosen the capscrew in the adjusting arm at the idler pulley and loosen the two fan idler hinge bolts 2 Move the fan idler in or out until the correct tension on the belts is obtained then tighten the capscrew in the adjusting arm and the fan idler hinge bolts D Removal of Fan Assembly 1 Remove the engine air pre cleaner engine hood and the right front fender 2 loosen the ten...

Page 76: ...ts if they are frayed Make certain that the pulley grooves are smooth G Assembly of Fan When assembling the fan refer to Fig 11 which shows the relative location of the parts 1 Press the rear bearing in position on the fan spindle Place the spacing sleeve and the Iront bearing spacing washer in position on 78 the spindle Press the Iront bearing in po sition on the spindle making certain it is pres...

Page 77: ... capscrews and lockwashers 3 Adjust the fan belts refer to FAN BELT AD JUSTMENT in this Section 4 Install the front fender engine hood and the air pre cleaner I Removal of Fan Belt Tightening Idler 1 Remove the right front fender Loosen the capscrew in the adjWlting arm of the idler pulley and loosen the two 2 fan idler hinge bolts 2 Move the fan idler pulley toward the engine 10 loosen the fan be...

Page 78: ...the press Place the rear bearing spacing ring in posi tion on the inner race of the front bearing and press the rear bearing into the pulley until the rear bearing is tight against the 80 spacing ring Press the oil seal into the pul ley with the lip of the seal pointing away from the bearing 3 Remove the pulley cap Using a suitable tool sleeve to support the inner and outer race of the front beari...

Page 79: ...essure relief valve located in the oil pump body limits the oil pump discharge pressure An oil cooler by pass valve located in the engine oil caoler adapter by passes the oil directly from the oil pump to the lubrication system in the engine if the oil passages in the oil cooler core become 81 clogged or if in cold weather the oil is too thick to circulate freely through the oil cooler core Sta bi...

Page 80: ... through drilled holes in the cylinder block 2 LUBRICATING OIL PUMP A Description The lubricating oil pump is a gear type pump driven by an intermediate gear in mesh with the driving gear located on the front end of the engine crankshaft The oil pump intermediate gear sup port is doweled and bolted to the front of the oil pump body The oil pump body gears are enclosed in a pump body which is bolte...

Page 81: ...ull the driven gear front gear used to drive the pump from the drive gear shaft and remove the front WOODRUff key from the shaft 6 Pull the drive gear shaft including the pump body drive gear from the pump body Place the drive gear shaft in an arbor press and press the shaft from the pump body drive gear Remove the WOODRUff key from the shaft 7 Remove capscrew locking washer and re taining washer ...

Page 82: ...y and secure with capscrews and lockwashers 84 5 Lubricate the bushing in the intermediate gear and install the gear in position on the intermediate gear support with the flat face of the intermediate gear facing the gear support Place the retaining washer and the locking washer in position on the gear sup port and install the capscrew Tighten the capscrew and secure with the locking washer 6 Inst...

Page 83: ...ckwasher used to secure the oil inlet to the inlet supporting brocket Inslall Ihe pump to regulator pipe Fig 3 using new attaching gaskels and 85 secure the pipe to Ihe pump body and to Ihe oil pressure regulator with capscrews and lockwashers 3 Inslail Ihe oil pan on Ihe engine using a new oil pan gasket and secure wilh capscrews and lockwashers Make certain the oil pan drain plug is tighlened se...

Page 84: ...o attention If the lubricat ing system has been allowed to sludge up the valve of the regulator may not work freely causing sticking in the opened or the closed position Whenever the lubricating oil pump is removed for inspection or repairs the oil pressure regulator as GASKET sembly should also be removed thoroughly clean ed and inspected C Removal of Oil Pressure Regulator With the oil pump remo...

Page 85: ... required B Removal of Oil Pump Driving Gear cond Intermediate Gear Whenever the lubricating oil pump is removed for inspection or repairs these two 2 gears should be inspected and replaced if necessary Check the backlash between the intermediate gear and the driving gear The minimum backlash is 005 and the maximum is 020 the backlash between these two gears is controllable by the use of adjusting...

Page 86: ...ng rear brackets to the main frame 7 Install tha two 2 WOODRUFF keys in the crankshaft and install the crankshaft pulley retaining washer and the crankshaft cap screw 8 Instoll the radiator assembly engine hood and the air pre deaner refer to INSTALLA TION OF RADIATOR AND RADIATOR SHELL in Section IV 5 LUBRICATING 011 COOI ER CAPSCREW ADAPTER CORE GASKET ADAPTER GASKET d BY PASS VALVE b __ 0 _ SPR...

Page 87: ...is suggested as a means of forcing the cleaning solution bock and forth through the core This operation should be con tinued until the core is clean CAUTION Cleaning with carbon tetrachloride is to be done in the open or with adequate ventilation due to the toxic quali ties of the chemical 89 Other solvents which have been found effective when used according to their manufacturer s di rections a r...

Page 88: ...pection this valve assembly should be removed cleaned and inspected NOTE The valve assembly located n the botlom of the oil cooler adapter need not be serviced as it is inoperative in this engine application C Removal of Oil Cooler By Pass Valve 1 Remove the right front fender 90 2 Remove the by pass valve plug from the oil cooler adapter then withdraw the spring and valve D inspection The valve a...

Page 89: ...sher element gasket and the filter element 4 Reaching inside the filter shell remove the element gasket and element washer from the shell center tube and discard 5 Thoroughly wash and dry the interior of the 91 filter shell Install and tighten the filter drain plug 6 Install a neW element washer in position on the shell center tube then install a new ele ment gasket and press the gasket down firm ...

Page 90: ...an Insert the new filter element into position in the filter housing and press the filter element down firmly PLAIN I I I I I I I I PLUG GASKET I REINFORCING l lJ FI ToR HO SING PLATE e e i OFI l GASKETS INLET CHECK VALVE ASSEMBLY _ DRAIN PLUG OUTLET CHECK VALVE ASSEMBLY Fig 8 Heavy Duly lubrl ating Oil Filter Delall 5 Place the element centering plate in position on the top of the filter element ...

Page 91: ...pening in the filter cover then stop the en gine Install and tighten the vent plug 10 Ch ck the oil level of the engine crankcase 93 and add oil as necessary to raise the oil level to the FUll mark on the ail level gage rod CAUTION Use only a DIESELPAK filter element in the Heavy Duty Filter ...

Page 92: ...en the engine shut off control knob is pU1 hed in forward as for as it will go running position the air shut off valve and the governor fuel shut off lever are moved to their full open position When the engine shut off control knob is pulled out back as for as it will go the air shut off valve and the governor fuel shut off lever are moved to their closed position B Adjustment of Engine Shut Off C...

Page 93: ...EAR R OD STOP CLAMP GOVERNOR FUEL I i STOP FOR J _ SHUT OFF7 E ER rr fi SWIVEL LEVER C 1 I l ENGINE SHUT OFF I i C I 1 cQ c FRONT ROD I I I ii r C 1ff iI THROTTLE LEVER GOVERNOR VARI SWIVEL LEVER I I ENGINE SHUT OFF SPEED CONTROL LE OTTlE CONTROl i J a r ROl KNOB FRONT ROD I lll f_l 7 7 STOP CLAMP I THROTTLE LEVER ENGINE SHUT OFF REAR ROD COWL I I STOP CLAMPS rl I I THROTTLE CONTROl 1 Ii THROTTLE ...

Page 94: ...of the blower The governor control mechanism transmits the motion of the governor weights to the injector racks This control mechanism consists of a vertical control shaft mounted inside a control shaft hous ing The vertical control shaft is mounted in a ball bearing at the upper end and in a needle bearing at the lower end The control shaft has a fork fixed to the lower end and a control shaft le...

Page 95: ...has been rem edied adjust the lever to equalize the affected injector with the others refer to INJECTOR EQUALIZING Section II b Make certain the injector control tube turns freely in its bearings Binding due 97 to poor alignment of the injector control tube brocket assemblies Can be correct ed by loosening the bracket capscrews and aligning the brackets with the in jector control tube The control ...

Page 96: ...OL SHAFT SPEED ADJUSTING HOUSING BALL BEARING WASHER WASHER GASKET I PACKING _____ i L Q WjOO EY VARIABLE J NEEDLE LEVER SPEED SPRING SETSCREW SPEED BEARING IIPIPE PLUG ADJUSTING WASHER VARIABLE I GASKET A SPEED il SPRING I K HOUSING CAPSCREW T Iil SPRING JI RETAINER S ING SPRING IDLE ADJU T RETAINER SCREW STOP NEEDLE BEARING EXPANSION PLUG WEIGHT AND CARRIER _ ij 1 ASSEMBLY RISER THRUST BEARING S...

Page 97: ...nterfere with proper operotion D Disassembly of Variable Speed Spring Housing 1 Remove the copscrews ottoching the voriable 99 speed spring housing to the control shoft housing 2 Remove the variable speed spring housing hold the spring in place in the spring re tainer so that the speed odjusting washers in the spring retainer will not foil out when removing Do not lose the spring retoiner stop 3 R...

Page 98: ...an all components thoroughly using clean fuel or solvent inspect the parts for wear and replace with new parts where needed When bearings and moving parts in the governor become worn new parts must be installed to aSSure proper function ing of the governor I Assembly of Governor To assemble the governor reverse the disassembly procedure Refer to Fig 5 showing the parts in their relative position W...

Page 99: ...ousing and make certain the pin in the lower end of the fuel shut off shaft engages the fork on the differential lever Install the cover attaching screws and tighten securely Cannect the fuel shut off rod to the fuel shut 101 off lever and check the travel of the fuel shut off lever Connect the throttle control front rod to the variable speed control lever 5 Install the fan belt tightening idler a...

Page 100: ... Each ad justing washer of 01 0 thickness will increase the high idle engine speed ap proximately 20 R P M To decrease the high idle speed remove the necessary amount of adjusting shims NOTE If the proper high idle engine speed cannot be obtained by the addition of adjusting washers this may be due to the governor spring retainer contacting the spring re tainer stop If this condition is found re m...

Page 101: ...peed is obtained With the engine running at low idle speed turn the buffer spring adjusting screW in until 103 a very slight increase not to exceed an in Crease of 20 R P M is noted in the low idle speed then lighten the adjusting screw lock nut ...

Page 102: ... of the generator is controlled by the generator regulator located on the side of the generator to prevent overcharging of the batteries 2 WARRANTY AND ADJUSTMENT POLICY Manufacturers of the batteries starter generator and generator regulator used on the tractor are responsible for this equipment during the warranty period Any claim for replacement or repair of any of these units must be presented...

Page 103: ...IPMENT Fig Wiring Diagram________________ J Heavy cables connect the batteries and the starter 10 gage cables connect the ammeter and gener ator and 14 gage cables connect the remaining units A 20 ampere fuse connected into the coble extending from the ammeter to the light switch prevents burning out of the lights in the event of a short circuit An additional fuse is provided in the 105 electrical...

Page 104: ...s TERMINAL PROTECTING BOOT CAPSCREW BATTERY TO GROUND CABLE ____________ Fig I Batteries Cables and Battery _____________ J Hold Down Assembly tight and dean If corrosion occurs dean the bat special attention should be given to hydrometer tery posts and terminals with a strong soda solu readings of the batteries The electrolyte in fully tion and coot the terminals lightly with vaseline be charged ...

Page 105: ...res when hot at 2400 armature R P M approximately 1425 en gine R P M As a steady charging rate of 12 13 amperes would soon destroy the batteries an out put controlling device is necessary To accomplish this a generator regulator with a cut out relay is wired to the generator circuit 1 Generator Regulator The generator regulator is mounted on the generatar field frame as shown in Fig 4 and is conne...

Page 106: ...rankshaft and the generator driv ing pulleys To adjust the belt loosen the adjusting arm capscrew at the front end of the generator and loosen the generator hinge bolts then move the generator in or out until the cor rect tension of the belt is obtained Tighten the adjusting arm capscrew and the gener ator hinge bolts 4 Connections The connections at the terminals should be lOB checked to be certa...

Page 107: ...ment closes the starter switch so that current can flow from the batteries to the starter ____ Fig 5 Starter location ____ 109 B Starter Service Field service on the starter will be limited to clean ing of the starter cleaning and adjustment of the drive assembly cleaning of the commutator and replacement of the brushes brush springs or start er switch All other adjustments or repairs require the ...

Page 108: ...roperly with the flywheel ring gear If the pinion seizes 110 while it is in mesh with the flywheel ring gear damage to the starter may result The drive assembly must be disassembled for cleaning or odiustment a Remove the starter Refer to REMOVAL AND INSTALLATION OF STARTER in this Section b Separate the drive housing from the starter field frame by removing the at taching capscrews mark both hous...

Page 109: ...e at this point the drive will be taken directly from the lugs on the pinion guide rather than from the heavy spline in the pinion itself Therefore the pinion and 111 the pinion guide should be replaced The pinion with its lock and lock spring is re leased by moving the pinion shift sleeve for ward and along the splines of the shaft In reassembling the parts the pinion lock lugs should be in the s...

Page 110: ...rvice 1 DESCRIPTION Topic No 1 2 3 I 5 6 7 The instruments which are standard equipment on the tractor consist of the engine ail pressure gage engine temperature gage fuel pressure gage and the ammeter and are mounted on the instrument panel of the cowl The engine hour meter which may be obtained as special equipment is mounted in the instrument panel as shown in Fig 1 112 ...

Page 111: ... to the rear of the water outlet manifold of the engine This gage indicates the engine coolant operating temperature which should be maintained between 1600 and 1850 F at all times The coolant temperature is controlled by a thermostat located in a thermostat housing mounted on the front of the water outlet manifold of the engine 4 AMMETER Th ammeter indicates the charging rate of the generator Whe...

Page 112: ...ed fuel filters clogged or leaking fuel lines or connec tions or improper fuel pump and pump pressure relief valve operation refer to FUEL SYSTEM Section 2 6 ENGINE HOUR METER SPECIAL EQUIPMENT The engine hour meter registers the number of hours the engine has operoted For instructions on how to read the hour meter refer to ENGINE HOUR METER in Section XX 7 INSTRUMENT SERVICE Anyone of Ihe various...

Page 113: ...ders fuel is injected into the cylinders by unit fuel injectors and is ignited by the heat of the compressed air B The Two Cycle DIESEL Engine In the 2 cycle DIESEL engine intake and exhaust take place during part of the compression and power strokes an external means of supplying the air is provided A specially designed blower bolted to the right side of the engine forces air into the cylinders t...

Page 114: ...sts The resulting pressure forces the piston downward until the exhaust valves are again opened As shown in Fig 5 the burned gases escape into the exhaust 116 FUEl Fig 4 Charge of Fuel Being Injected Info Combustion Chamber Fig 5 Exhau t Taking Place and Cylinders About to Be Swept witlt Clean Scavenging Air manifold as the downward moving piston uncovers the air inlet ports When these ports are u...

Page 115: ... is used between the cylinder head and the cylinder block at the outer rim to provide an oil seal On engines Serial No 4A 19529 and above the cylinder block and cylinder head were modified to provide a metal to metal contact between the cylinder block and the cylinder head The top of the cylinder block is recessed to retain individual compression gaskets for each cylinder and rubber seal rings for...

Page 116: ... capscrews attaching the water outlet elbow and the water by pass tube 118 assembly to the front of the water outlet manifold and remove the thermostat from the manifold 14 Remove the rocker cover and the governor control housing cover Disconnect the gov ernor to injector contral lever link from the governor and the injector control tube lever and remove the link 15 Remove the two 2 capscrews atta...

Page 117: ...type cylinder blocks Blowers and exhaust mufflers ore interchangeable between the old and the new types The cylinder head stud holes in the new type cyl inder blocks are 5fa deeper than the stud holes in the old slyIe blocks and are counterbored Vl instead of being countersunk The studs used in the neW Iype block are 6 in length and those used in Ihe old type block are 5 in length Summary 1 The ty...

Page 118: ...inder head and tighten to a torque of 10 to 12 Ibs ft 6 Install a new gasket between the governor control shaft housing and the cylinder head and install the two 2 attoching capscrews Tighten the four 4 capscrews attaching the lower end of the governor control shaft housing to the governor weight housing 120 7 Install the governor to injector control lever link then install the governor control ho...

Page 119: ...operates the fuel injector as shown in Fig 8 Engines prior to Serial No 4A 29209 were pro vided with injector rocker arms with the injector end of the rocker arms fitted with a hardened ball stud and a ball seat which forms a flexible joint The ball seat transmits the rocker arm motion to the fuel injector Engines Serial No 4A 29209 and above were provided with injector rocker arms with the inject...

Page 120: ...o warm up to operating temperature in preparation for the final correct adjustment 1 Remove the air pre cleaner engine hood and the rocker cover 2 Crank the engine with the starter until the injector rocker arm of the cylinder to be 122 adjusted is down and the injector plunger follower is at the bottom of its stroke The exhaust valves for that cylinder will then be closed and the valve rocker arm...

Page 121: ...arm shaft by reversing the sequence of 123 operations for removal Install the injector center rocker arm on the rocker arm shaft On early model engines the injector rocker arm Can be identified as the rocker arm fitted with ball stud and ball seat On late model engines the injector rocker arm can be identified as the rocker arm having twa bosses of equal length Install each valve rocker arm on the...

Page 122: ...wer assemblies have been removed they should be cleaned in solvent blown dry with compressed air and inspected before they are again assembled in the cylinder head 124 CAM rVI L VVI LOWER SPRING ROC KER ARM BRACKET I V WIRE i PRING RETAINER tU LL lVVI K SPRING ___ Fig I I Camshaft Follower and ___ J Push Rod Assembly BRACKET BOLT ROCKER SHAFT BRACKET I ROCKER SHAFT ROCKER SHAFT BRACK T BOLTJ J VAL...

Page 123: ...he follower point ing away from the exhaust valves The roller must engage the slot in the fol lower roller guide b With the spring upper seat retainer Iock wire removed and with the spring lower 125 seat follower spring and spring re tainer upper seat installed on the push rod insert the push rod assembly into the head and the camshaft follower c Depress the camshaft follower spring with a screwdr...

Page 124: ...ts The exhaust valve spring when compressed to a length of 2 3116 should have an ap proximate load of 44 Ibs When the spring is compressed to a length of 1 51 64 it should have a load of 140 Ibs plus or minus 4 Ibs Replace the spring when it has a loading of less than 122 Ibs when com pressed to a length of I 51 64 7 Install the exhaust valve spring by reversing the sequence of operations for its ...

Page 125: ...he bottom until the collar of tool is against the surface of the head This will locate the valve guides for the proper height flush with the top edges of the head 6 After the valve guides have been installed insert the valve stems into the guides to check for the proper clearance of 002 to 004 between the stems and the guides If the 127 VALVE GUIDE REAMER CYLINDER HEAD t ___ Fig 16 Reaming Valve G...

Page 126: ...insert While holding the collet in this position expand the collet by turning the nut at the top of the tool Be sure that the flange of the collet is firmly entered just below the valve seat insert b Place the tool body oVer the top of the collet with the ALLEN screw of the body in line with the slot below the threads on the collet Turn the ALLEN screw IN to engage the slot and lock the screw on t...

Page 127: ...ngine Serial No 4A 19529 and above the cylinder block and the cylinder head were revised to provide metal to metal contact between the cylinder block and the cylinder head The new type cylinder head is approximately 129 TAP HANDLE VALVE GUIDE CLEANING Reaming Valve Gllides ___ 7 32 wider than the cylinder head used previous to this serial number In conjunction with this cyl inder head and block ch...

Page 128: ...n whether it is the late type or the early type valve as described above The valve guide should be thoroughly cleaned with the valve guide cleaner tool If the bore in the valve guide is worn oblong or if the valve heads are warped relative to the valve stem the neces sary parts must be replaced 130 The width of the valve seats of the late type 30 exhaust valves and valve seat inserts must be be tw...

Page 129: ... crankcase which is the main structural part of the engine is a box like one piece casting made of alloy cast iron Rugged transverse members casl integral provide rigidity and strength assuring perfect alignmenl of the bores and bearings under all loads The cylinder block is bored to receive the cylinder liners The water jackets extend the full length at the cylinder bores and are divided into upp...

Page 130: ...ion between any two adjacent cylinder liners should not exceed 002 If upon inspection the top surface of any cylinder liner flange is not 002 to 006 above the top flat surface of the cylinder block or the difference between any two adjacent liners exceeds 002 the necessary cylinder liner shims must be installed between the bottom of the cylinder liner flange and the shoulder in the cylinder block ...

Page 131: ...the cylinder liners and the liner bores in the cylinder block Discard the cylinder liners if they are scored cracked or worn beyond the allowable limits Slightly scuffed cylinder liners if not worn may sometimes be made usable by polishing or lapping to remove the surface irregularities Clean the cylinder liner ports removing any burrs made in the cleaning of the ports Failure to remove all the bu...

Page 132: ...the top surface of the cyl inder liner flange must be 002 to 006 above the top flat surface of the cylinder block and the difference between any two adiacent cylinder liners should not exceed 002 CAUTION These dimensions must be held in order to obtain proper sealing of the gasket set between the cylinder head and the cylinder block when the cylinder head is tightened in place 3 On tractors having...

Page 133: ...e moved for cleaning of the oil and water passages in the cylinder block and be sure all these plugs are installed in their proper places after the block 135 has been cleaned and dried Coat the threads of all plugs with white lead to assure a tight sea The plugs must be installed so that they do not project from the block to interfere with the fit of the attached parts G Air Box Drain Tube Three 3...

Page 134: ...d are of the precision type replaceable without machining The main bearing caps are attached to the cylinder block and line bored in position to receive the precision bearing shells Each bearing cap is num bered and when removed should always be 136 replaced in its respective position and with the numbers of the bearing caps located towards the blower side of the engine The upper halves of the mai...

Page 135: ...ely worn at this point do not discard the crankshaft An oil seal spacer is avail 137 able and may be installed in front of the oil seal to change the contact position of the seal lip on the crankshaft If the surface of the crankshaft is found to be badly worn and scored at the location of contact with the rear oil seal so that the use of the oil seal spacer will not present a smooth contact surfac...

Page 136: ...eter at the parting line than they are 90 from the parting line The two 2 shells do not D c h APPROX A IS 001 SMALLER THAN B C IS 0005 THICKER THAN D En 15 030 GREATER THAN F fig 28 Measuring Inside Diameter of __ Main Bearing Shell form a true circle when not installed and when measured for inside diameter they should be installed in the cylinder block and the bearing caps bolted tightly in place...

Page 137: ...ick in the holder as this will leave a groove around the wick and will allow too much oil to pass through 139 G Flywheel Ring Gear and Engine Clutch Shaft Front Bearing Inspection and Replacement Ta remOve the flywheel from the engine with it assembled in the tractor it is necessary to remove the engine clutch and clutch housing refer to ENGINE CLUTCH REMOVAL Section X 1 FLYWHEEl Inspect the clutc...

Page 138: ... REMOVAL Section IV 2 Release the tension on the fan bells and remove the belts from the crankshaft pulley 3 Remove Ihe crankshaft capscrew and washer used to retain the crankshaft pulley Using a puller similar to the one shown in Fig 29 remove the crankshaft pulley from the crank shaft I Installation of Crankshaft Pulley 1 Install the two 2 WOODRUFF keys in 140 CI an sh ft Pulley __ the crankshaf...

Page 139: ...ancing rib is provided on the inside of the bottom of the piston skirt to balance the piston Each piston is fitted with four 4 compression rings and four 4 oil control rings of the conventional cut joint type The four 4 Ya wide compression rings are installed in the four 4 grooves in the piston above the piston pin and the four 4 oil control rings with two 2 expanders are installed in the two 2 gr...

Page 140: ...ay be detected in this manner with the piston at the bottom of its stroke and the air inlet ports uncovered the pistons may be inspected for score marks or for worn stuck or broken rings as each piston is moved upward The presence of the original tool marks on the piston ring surfaces indicates negligible wear The upper part of the piston above the upper compression ring is not tin plated and does...

Page 141: ...ze F Inspection of Connecting Rod Assembly After washing the connecting rod assembly in clean solvent or fuel the bushings at the upper end oil passages spray nozzle etc should be examined 1 Measure the outside diameter of the piston pin to determine the wear The standard dimension for the piston pin diameter is 1 4996 to 1 500 2 The standard inside diameter of the bush ings in the connecting rod ...

Page 142: ...e clearance at the ends of the piston pin and at points 90 from the ends of the pin If a bind exists in one place only turn the cylinder liner 90 in the cylinder block and check the clearance again this sometimes eliminates the binding Also inspect for slight burrs on the piston or the cylinder liner if binding exists Remove all burrs with a honing stone or fine emery paper If after removing any b...

Page 143: ...use it to toke a set contributing to ring breakage I Replacement and Reaming of Piston Pin Bushings in Connecting Rod 1 Remove the bushings from the connecting rod with the driving bar and driver block as shown in Fig 34 2 Install the new bushings pressing one into each side of the connecting rod with outer end of each bushing flush with the outer edge of the rod and with the joints of the bushing...

Page 144: ...in with engine oil and insert the piston pin into position in the piston and the connecting rod The piston pin will slip easily into place without forcing if it hos been correctly fitted 3 Install the other piston pin retainer and the retainer lock ring at the opposite end of the piston pin IMPORTANT Install the piston pin retainer lock rings so that the offset in the tips of the rings will bear a...

Page 145: ... piece and are held to gether by retaining rings Each bearing assembly is located and locked in position in the cylinder block by a shouldered locking screw which is installed into a counterbore at the top of the cylinder block The cams are ground with parallel surfaces to assure efficient quiet camshaft follower roller ac tion Heat treatment provides hard wear resistant cam lobes The function of ...

Page 146: ... be reground the diameter of the intermediate journals should be reduced to 010 below 1 4985 to fil the 010 undersize intermediate bearings Examine both faces of the cam and the balance shaft bearing Ihrust washers and if either face Is scored replace the thrust washers Examine Ihe surfaces against which Ihe Ihrusl washers contael and if the surfaces are scratched but not severely scored they may ...

Page 147: ...te type cylinder blocks The camshaft intermediate bearings used at the 149 upper position in the late type cylinder blacks have a hole for each bearing locking screw drilled all the way through the bearing whereas the hole for each locking screw in the intermediate bearings used in the early type cylinder blocks is drilled only partially through the bearing The threaded por tian of the late type i...

Page 148: ... of the thrust washer faces the front end bearing assembly 5 Install the WOODRUFF key in slot in the front end of the balance shaft Install the front balance weight in position On the bal once shaft Place the lockwasher on the balance shaft and start the balance shaft nut but do not tighten the nut at this time as it will be tightened after the installation of the camshaft I Installation of Camsha...

Page 149: ...ward position The end play should not be less than 004 and should not exceed 018 If the end play exceeds 018 it is recommended to install oversize thrust wash ers Thrust washers of 010 oversize in thickness are available for service these thrust washers are identified by a 10 stamped an the steel back 9 Wedge a dean doth between the balance shaft gear and the camshaft gear and tight en the nuts to...

Page 150: ... noisy or if the gear teeth become chipped or 152 burred from careless handling the gear train will be noisy When noisy conditions develop in the gear train it will be necessary to remove the engine and in spect the gears and the bearings The entire gear train is exposed when the combination flywheel housing and gear train cover is removed from the cylinder block c Inspection and Disassembly of Id...

Page 151: ... race and rollers in position in the outer race Turn the gear and inner raCe over with inner race down and place the gear and inner 153 race in position on a press with suitable supports under the inner race to stop the hub when it is pressed into the bearing d Place the spacer in position on the inner race in the gear then insert the other inner race and rollers in position in the outer race e De...

Page 152: ... gasket in position on the cylinder block and install the flywheel housing Install and tighten the six 6 capscrews three 3 on each side near the crankshaft Install and tighten two 2 bolts in the top of the fly 154 wheel housing Make certain that the loose end of the cord on the idler gear can be reached through the opening in the flywheel housing for the camshaft gear e Install the six 6 drilled h...

Page 153: ...ap screw heads to lock the capscrews in position CAUTION Special care must be laken to prated the jdler gear assembly against the entry of dirt Keep the parts clean before and during jnstal ation on the engine 9 REPAIR OF ENGINE WHILE INSTALLED A General Repair or replacement of the crankshaft camshaft and bearings balance shaft and bearings timing gears and the rear crankshaft oil seal requires t...

Page 154: ...ring checking Or signs of over heating If any of these conditions exist the crankshaft will require reconditioning or replacement 156 7 Install the pistons and the connecting rods as explained in ASSEMBLY OF ENGINE in this Section Be sure that all parts are clean and lubricated before they are installed 8 Install the oil pump assembly and the oil pan refer to OIL PUMP INSTALLATION Sec tion V Fill ...

Page 155: ...s been in stalled place the lower non grooved bear ing shell in the bearing cap lubricate with clean engine oil and install the bearing cap NOTE The main bearing caps are marked 1 2 3 etc Whenever the bearing caps are removed they must be reinstalled in their 157 Fig 40 Removing Rear Ma n Bearing Upper Shell original positions and with the marked side toward the blower side of cylinder block 9 Aft...

Page 156: ...ld the bolts and small parts removed from the engine and the tractor It is recommended that the tractor particularly the engine be washed before the engine is removed This will not only prevent dirt from getting on the exposed parts at disassembly but will make the work much quicker and more easily done EXHAUST MUFFLER 158 A Engine Removal 1 Remove the engine air pre cleaner engine hood and the fr...

Page 157: ...ut off lever located 159 on the rear of the engine Remove the yoke pin connecting the throttle operating rear rod to the lever located on the rear of the engine 13 Remove the yoke pin connecting the front end of the transmission shifting lock plunger rod left rod to the engine clutch shifting yoke shaft lever Remove the cotter pin from the front end of the transmission shifting lock plunger rod ri...

Page 158: ...e to the sealastic union at the lower right side of the engine flywheel housing 7 Connect the engine oil pressure gage tube and the fuel pressure gage tube to their corresponding lines 8 Connect the upper end of the engine primer 160 line to the engine primer pump 9 Connect the fuel supply line to the sealastic union at the left rear of the engine 10 Connect the wiring harness to the starter and t...

Page 159: ...he top of the sec ond stage fuel filter With the engine shut off control knob pulled back to the STOP position crank the engine with the starter 161 several times and allow the second stage filter to fill with fuel Tighten the filter vent screw when fuel emerges from around the loosened vent screw 21 Install the floor plate brake pedal pads gear shift lever extension geor shift lever guide front f...

Page 160: ...g bracket lubricating oil filter and filter base starter and engine air box drain tube Re move the air box handhole covers from the side of the cylinder block 2 Remove the jam nut and lockwasher attach 162 ing the engine clutch shifting sleeve bearing lubricating tube to the engine clutch housing Push the end of the lubricating tube down into the clutch housing 3 Remove the capscrews attaching the...

Page 161: ...k from the governor differ ential lever and remove the link Remove the capscrews attaching the governor control shaft housing to the cylinder head and to the governor weight housing Pull the top of the housing away from the engine and push the lower end of the housing towards the engine to disengage the fork and remove the housing assembly 12 Remove the water outlet manifold and the water by pass ...

Page 162: ...ld from turning by wedging a block of wood be tween the balance weights Pry the balance weight from the shafts by using two 2 heavy screwdrivers or pry bars between the heads of the front end bearing retaining capscrews and the balance weights as shown in Fig 46 Remove the WOODRUFF keys from the shafts Remove the front thrust washer from each shaft WOODEN BLOCK CAMSHAFT NUT __ Fig 45 Re no ing Co ...

Page 163: ...e and remOve the support assembly and the oil pipe 12 Remove the capscrews attaching the cylinder 165 block rear end plate to the cylinder block and remove the end plate Remove the cap screws attaching the cylinder block front end plate to the cylinder block and remove the end plate 13 Remove the oil pump refer to OIL PUMP REMOVAL Section V Remove the oil pressure regulator from the cylinder block...

Page 164: ...the main bearing caps Place the lower halves of 166 the two piece thrust washers in position on the dowels of the rear main bearing cap The bearing caps are numbered 1 2 3 etc indicating their respective positions Instoll the caps with the numbered side toward the blower side of the cylinder block and instoll the main bearing cap bolts and lockwashers Use a torque wrench and tighten the bolts to a...

Page 165: ...er liner shims are available in two sizes 0015 and 003 thick In tractors having the early type cylinder block blocks not requiring cylinder liner supporting inserts if the top surface of any cylinder liner flange is not 002 to 006 above the top flat surface of the cylinder block or the difference between any two adjacent cylinder liners exceeds 002 the necessary cylinder liner shims must be in sta...

Page 166: ...n the end plate and the 168 cylinder block on blower side of engine to accurately align the hole in the end plate with the bore in the cylinder block The holes in the front end plate for the camshaft and the balance shaft front end bearings are not the same size The hole for the camshaft front end bearing is machined to 2 187 diameter while the hole for the balance shaft front end bearing is 2 250...

Page 167: ...5 to 45 Ibs ft d Turr the camshaft intermediate bearings sO that the locking screw holes in the bearings align with the holes in the top 169 of the cylinder block then install the locking screws and tighten securely IMPORTANT Refer to the NOTE in Step 3 of INSTALLATION OF PARTS ON THE CAMSHAFT AND BALANCE SHAFT in this Section and make certain that the correct locking screws and inter mediate bear...

Page 168: ...l housing the sealing lip of the seal must face the en gine when the housing is installed P Using gasket cement cement the fly wheel housing gasket to the cylinder block rear end plate Using an oil seal expander tool placed on the dowels in the crankshaft as shawn in Fig 48 to expand the oil seal lubricate the seal and slide the flywheel housing on the crankshaft and against the cylinder 170 CRANK...

Page 169: ...bolting flange of the crankshaft are smooth and free of nicks or burrs that would prevent the flywheel from fitting up tight against the crankshaft flange 171 24 Install the flywheel in position on the rear of the crankshaft and install the six 6 drilled head bolts Due to one offset hole in the flange of the crankshaft and in the flywheel the flywheel can be located in only one posi tion Tighten t...

Page 170: ...ing and raw fuel and lubricating oil may appear in the exhaust_ This 172 condition will correct itself as the engine is run in Before starting the engine ofter it has been rebuilt inspect the engine crankcase oil level fuel and the cooling system and see that the air cleaner has been properly serviced Start the engine and allow it to run at Y2 throttle see that all the goge readings are normaI The...

Page 171: ...173 ...

Page 172: ...shaft is provided for stopping the rotation of the transmission gears for shifting The dutch ROCKfORD ENGINE brake is applied by pushing forward on the engine clutch operating lever after disengaging the clutch The clutch shifting sleeve dutch shifting bearing throwout bearing and the clutch shaft rear bearing require periodic lubrication The clutch back plate is bolted to the rear face of the eng...

Page 173: ... shaft by a universal joint assembly By removal of the uni versal joint assembly the engine dutch can be removed without disturbing the engine or the transmission The engine clutch broke consists of a clutch brake plate assembly and a broke disc The clutch brake plate assembly on the ROCKFORD clutch is sta 175 tionary and is adjustable by means of a brake disc adjusting ring the clutch brake plate...

Page 174: ...erating lever diminishes When the pull on the 176 lever diminishes to 30 pounds an adjustment is necessary CAUTION Do not operate the tractor when the pull on this lever is less than 30 pounds D To Adjust the ROCKFORD Clutch 1 Remove the dutch inspection plate from the upper right side of the dutch housing 2 Disengage the clutch and crank the engine with the starter until the clutch adjusting lock...

Page 175: ...ust below lever hand grip and weigh the pull required to engage 177 the clutch When the clutch is properly ad justed a pull of 48 to 50 pounds is required on the operating lever for its engagement 6 Inspect the clutch brake plate facing and replace the facing when badly Worn 7 Clean and install the clutch inspection plate in position on the dutch housing F Engine Clutch linkage Adjustment The engi...

Page 176: ...ng and remove the dutch shaft 178 and dutch shaft rear bearing retainer as an assembly 4 Remove the engine clutch inspection plate from the dutch housing Remove the jam nut from the clutch shifting bearing lubri cating tube refer to Fig 4 Push the outer end of the lubricating tube into the clutch housing 5 Disconnect the front end of the clutch oper ating lever rod from the shifting yoke shaft lev...

Page 177: ...ngine clutch assembly on a clean work bench with the pressure plate side of the clutch downward b Remove the brake disc retaining snap ring and turn the brake adiusting ring off the shifter bearing carrier c Remove the four 4 pins connecting the actuating lever links to the shifting sleeve and remove the shifting sleeve and the shifter bearing carrier as a unit Remove the capscrews attaching the b...

Page 178: ...lain washers attaching the pressure ring to the pressure plate Remove the 180 pressure ring from the pressure plate Remove the pressure springs spring cups and insulating washers c Remove the pins connecting the actu ating lever links to the actuating levers d Remove the adjusting ring locking screw and the adjusting ring locking plate Remove the two 2 adjusting ring spacer capscrews and adjusting...

Page 179: ...ear points Check the actuating lever beams for flatness and if the beams are dished they should be replaced 5 Inspect the bushings in the shifting sleeve for Wear and roughness and replace the sleeve if necessary 6 Check the clutch back plate for cracks and replace if cracks are evident 7 Inspect the shifting sleeve ball bearing for wear and roughness Replace the bearing if it is worn excessively ...

Page 180: ...3 Inspect the clutch shaft If the shaft is ex cessively worn at the location of the clutch shifting sleeve Or if the splines of the shaft show excessive wear the shaft must be replaced 182 14 Insped the lubricating tube for the clutch shifting bearing and replace the tube if necessary 15 Inspect the clutch brake plate assembly If the brake plate facings are worn to the extent that the rivet heads ...

Page 181: ...RESSURE SPRING INSULATING WASHER PIN I v SHIFTING SLEEVE CAPSCREW PRESSURE PLATE RETRACTING SPRING DRIVING DISC ASSEMBLY ADJUSTING RING SPACER CAPSCREW SEAliNG RING SHIFTING SLEEVE BALL BEARING SHIFTING SLEEVE YOKE CLUTCH BRAKE l PLATE BRAKE PLATE FACING __ l RIVET F iff 1 GREASE SHIELD CAPSCREW SHIFTING SLEEVE YOKE BUSHING BEARING RETAINER CAPSCREW ____________ Fig 12 Engine Clutch Detail Auburn ...

Page 182: ... capscrews nuts and lockwashers clamping the clutch shifting yoke 10 Ihe shifting yoke shafts b Spread the opening in each end of the shifting yoke using a broad face chisel 184 or similar 1001 to free Ihe yoke an the shafts c Pull the shifting yoke shafts oul of Ihe yoke and remove Ihe WOODRUFF key from the inner end of each shaft d Pull the shafts aut of the shaft needle bearings and inspec Ihe ...

Page 183: ...hing through the clutch inspection plate opening in the clutch housing insert the end of the lubricating tube for the clutch shifting sleeve ball bearing into the hole in the clutch housing Install the lockwasher and jam nut 185 on the end of the lubricating tube to hold the tube in position 6 Install the transmission shifting lock lever in position on the outer end of the clutch shift ing yoke ri...

Page 184: ...he clutch brake plate are worn down to the rivet heads the facings must be replaced Inspect the brake disc for wear and scoring slight scoring or uneven wear can be removed by machining however if the disc is worn or scored excessively it must be replaced C Removal of Engine Clutch Brgke 186 1 Remove the brake pedal pads gear shift lever guide gear shift lever floor plate and the right front fende...

Page 185: ...ng levers The shifting movement of each shifting fork shaft is controlled by detent notches in the shifting shafts and steel balls detent balls located in the trans mission case Each shifting fork is so positioned and clamped to its shifting shaft so that when each shifting shaft is shifted to the desired speed range the detent balls enter the detent notches in the shifting shafts and properly loc...

Page 186: ...SPRING CAe T _ nr SPRING DETENT BALLS HI LOu SHIfT LEVER TOP SHIFT LEVER PIVOT SHAFT SETSCREW GEAR SHIFT GEAR SHIFT LEVER SHIFTING FORK SHAFT e NTERi SHIFTING FORK BEVEL PINION FRONT BEARING HI LO SHIFT LEVER BOOT HI LO SHIfT LEVER PIVOT SCREW HI LO SHIFT LEVER HOUSING SHIFTING LOCK PLUNGER t o L 4 TOP SHAFT I FRONT BEARING RETAINER INTERMEDIATE SHAFT FRONT BEARING COVER J DRAIN PLUG L ___________...

Page 187: ...OIL HIGH RANGE GEAR SHIFTING COlLAR BEVEL PINION LOCKNUT A SNAP RING It BEVel PINION DEPTH ADJUSTING BEVEL PINION FRONT BEARING SPACING WASHE 2ND REVERSE GEAR 8 ZZWM GEAR HUB JRD 5TH SPEED GEAR 3RD REVERSE GEAR SPACING SLEEVE 6TH SPEED GEAR 46 T REVERSE GEAR 21 T SHAFT REAR BALL BEARING SLEEVE LOCKING SCREW TOP SHAFT LOCKNUT TOP SHAFT REAR BEARING SLEEVE ADJUSTING SHIMS TOP SHAfT il 1ST 2ND SPEED ...

Page 188: ...table chain and hoist support the weight of the transmission assembly and re move the capscrews attaching the trans mission to the steering clutch and frnal drive housing 10 Move the transmission forward until the rear boss of the transmission case is free of its bore in the steering clutch and frnal drive housing then raise and remove the trans mission NOTE Keep the transmission in alignment stra...

Page 189: ... and tie the cover shims to the cover to pre vent loss of the shims 8 On early model tractors unlock the lock washer and remove the nut from the front of the transmission bevel pinion On later model tractors unlock the bevel pinion lock nut before loosening it for removal from the transmission bevel pinion Do not remove the snap ring from the bevel pinion front ball bearing or the bevel pinion dep...

Page 190: ...hims from the transmission case 14 Drive the top shaft toward the rear of the case until the shaft is free of the front bear ing spacing sleeve and front roller bearing Pull the shaft from the transmission case and remove the three 3 gears bearing spacing sleeve and the bearing spacer from the case 15 Clamp the top shaft in a vise protecting the splines of the shaft by uSe of copper jaws or simila...

Page 191: ...detent grooves for the detent bolls However the trans missions in Tractors prior to Serial No 2939 and in Tractors Serial No 3896 and above have shift ing collars hubs and corresponding gears with narroW engaging teeth and have shifting fork shafts with equally spaced detent grpoves NOTE The wide tooth type shifting col ars hubs and gears and the shifting fork shafts with the elongated detent groo...

Page 192: ...case from the rear iust for enough to start the remaining com ponents onto the shaft d Start the 4th and 6th speed gear 46 teeth on the splines of the shaft with the hub end of the gear toward the front of 194 the shaft Install the gear spacing sleeve 1 5 16 long on the shaft against the hub of the gear Install the 3rd and 5th speed gear 41 teeth on the shaft with the hub end of the gear against t...

Page 193: ...igh range gear With the snap ring installed in the rear roller bearing install the rear roller bearing into position in the rear bore of 195 the transmission case and onto the inner race of the bearing which was installed on Ihe shaft On early model tractors install the lockwasher and Ihe rear nul on the shaft On later model tractors install the rear locknut on the shaft h Instalilhe front ball be...

Page 194: ...he front roller bearing f Inslall an oil seal in the front bearing retainer with Ihe sealing lip of the seal toward Ihe rear g Using gaskel cement cement a front bearing relainer gasket to the Iransmis 196 sion case and attach the front bearing relainer to the case with four 4 Yo x 2Y capscrews and lockwashers h Insert the rear bearing sleeve into the transmission top shaft rear bore align ing Ihe...

Page 195: ... GEAR ROlLER BEARING BEARING SPACER SHIFTING COlLAR GEAR ROllER BEARING 4TH AND 6T I H SPEED GEAR GEAR ROllER CQIl 3RD REVERSE GEAR GEAR HUB GEAR SPACING WASHER LmREAR ROLLER BEARING I BEARING SNAP RING GEAR SPACING WASHER GEAR HUB GEAR ROLLER BEARING 1ST REVERSE GEAR BEARING SPACER m GEAR ROllER BEARING 1ST AND 2ND SPEED GEAR BEVEL PINION ...

Page 196: ...case so that the top of the case rests on the work bench as shown in Fig 10 Make certain the three 3 shifting collars are in their neutral position Start the bevel pinion into the case from the rear While push ing on the pinion turn the gears and 198 position the bevel pinion as necessary to align the splines of the pinion with the corresponding splines in the gear spac ing washers and the gear hu...

Page 197: ...e initial transmission bevel pinion depth controlled by depth adjusting shims located between the transmission bevel pinion front bearing snap ring and the transmission case should be set so that the rear face of the bevel pinion extends 4 149 from the rear face of the transmission case m If the bevel pinion has a mounting dis tance dimension marked On the rear face of the pinion subtract this dim...

Page 198: ... fork lo cated on the rear cluster of gears Make certain the center detent otch of the 200 shifting fork shaft is in line with the steel balls detent balls e Insert a sleel ball detent ball and an interlock spring into each hole over each shifting fork shaft then install the three washers and interlock spring capscrews Tighten the capscrews securely f Make certain that the shift lever notches in t...

Page 199: ...and bracket in position on the transmission case and secure with the attach ing capscrews Connect the steering dutch control rods to the steering levers 201 4 Install the yoke pins and cotter pins used to connect the shifting lock plunger rods to the two 2 shifting lock plungers and check the adjustment of the rods when connecting as follows a To adjust the shifting lock plunger rod on the right s...

Page 200: ...tall a puller similor to the one shown in Fig 12 Place suitable wooden blocks be tween the right side of the bevel gear ond the comportment wall to hold the bevel gear stationary Tighten the puller screw hex nut and pull the bevel gear shaft from the gear 6 Remove the hex nut from the puller screw and remove the wooden blocks which were installed in step 5 Tilt the bevel gear shaft and remove the ...

Page 201: ...ng certain that the heads of the bolts are positioned so that the locking ring will contact the bevel gear when in stalled 3 lubricate the other bearing cone and start it on the left end of the bevel gear shaft with the large diameter of the bearing to ward the bevel gear Using special tools similar to the ones shown in Fig 15 install the puller screw used in removal in the tapped hole in the left...

Page 202: ...hined surface of the 204 bevel gear shaft flange Lock the tele scoping gage in position use an outside micrometer to measure the telescoping gage and record this measurement b To calculate this distance refer to Fig 11 divide the diameter of the bevel gear shaft flange by two 2 and subtract this distance from the mounting distance marked on the toe end of the bevel pipion EXAMPLE The diameter of t...

Page 203: ... bearing cages install the oil seals in the bearing cages so that the sealing lips of the seals are toward the bevel gear when installed lubricate bevel gear shaft and reinstall the bearing cages using care so that the lips of the seals are not crimped or damaged IMPORTANT When installing the bearing cages make ceriain Ihey are posilioned so fhallhe wear pin for Ihe clulch fhrowoul yokes are local...

Page 204: ... remove the floor plate and lubricate the universal joint assembly 206 C R emoval Disassembly and Inspection 1 Remove the brake pedal pods gear shift lever guide speed selection shift lever and the floor plate 2 Remove the two 2 U bolts attaching the rear journal assembly to the rear yoke Use a small pry bar and pry the universal joint assembly forward on the clutch shaft splines to free the journ...

Page 205: ...CAPSCREW i ffi 1 1 L 0 REAR YOKE RETAINING WASHER SEAL JOU NAl lOCKING WlRE lOCKWASHER Fig 20 0r Iva Shaft Assembly DUn versal Joint etolls 207 ...

Page 206: ...tion discs and seventeen 17 steel discs assembled alternately Pressure springs hold the steering clutch discs tightly together between the steering clutch pressure plate and the steering clutch throwout plate in assembly Power is transmitted from the bevel gear shaft through the steering clutches to the final drive pinions The steering clutches are manually dis engaged by pulling baCK on the steer...

Page 207: ...bond adjustment hole covers from the top of the steering dutch housing and pour about three gallons of solvent into each steering clutch compart ment Drive the tractar bock and forth in a straight line for approximately five minutes leaving the steering clutches engaged The oil on the exterior of the steering dutches and brakes will be washed off in this opera tion 3 Drain the steering clutch comp...

Page 208: ...sed in lifting the steering dutch and brake drum assembly from the clutch compartment 8 Remove the capscrews attaching the steer ing clutch assembly to the driving hub and to the brake drum hub This will necessitate turning the steering clutch assembly and 210 brake drum which can be accomplished by using a jack placed under the rear of the track and moving the tractOr Or by turning the track spro...

Page 209: ...on and Repairs When the steering clutch has been disassembled inspect the following items 1 Steel Discs The specified thickness of a steel disc when new is 083 to 096 Inspect the discs for wear and scoring The discs must be flat within 015 2 Friction Discs The specified thickness of a friction disc when new is 152 to 157 Inspect the discs for wear condition of teeth and scoring If the thickness of...

Page 210: ...___ 212 4 Clutch Hub Inspect the teeth of the steering dutch hub for weor as heavy grooving may cause binding with the teeth of the steel discs G Assembly of Steering Clutch Refer to Figs 8 and 9 showing the steering dutch components in their relative position 1 lubricate the teeth of the steering clutch hub and the outer diameter of the steering clutch throwout plate sporingly with a graphite bas...

Page 211: ...ring Clutch Disle Stack Height 10 Place the clutch pressure plate in position making certain the punch marks are aligned and place the tool compressing sleeve through the center of the pressure plate and dawn an the clutch hub as shown in Fig 11 213 STEERING WOODE N BLOCK II THICK Fig 11 Compressing Steering Clutch Pressure Springs to Install Capscrews 11 Insert the tool forcing screW through the ...

Page 212: ...owing removal procedure applies 10 eifher Ihrowoul bearing assembly Refer 10 Fig 8 showing the components in their relative position 1 Remove the steering clutch refer to STEER ING CLUTCH REMOVAL in this Section 2 Disconnect the upper end of the lubricating tube for the clutch throwout sleeve bearing 3 Unlock the capscrew retaining the steering clutch driving hub to the bevel gear shaft and remove...

Page 213: ...Fig 14 Steering Clutch Throwout Sleeve Bearing Oiling Wicle and Wick Holder the holder by twisting be sure to untwist after the wick has been inserted c Start the upper wick into the wick holder and push the wick down until the lower end bottoms in the hole of the wick holder D Assembly and Installation of Steering Clutch Throwout Bearing Assemblies Assembly and installation of the steering clutch...

Page 214: ...on by a snap ring The steering lever booster assemblies assist in de creasing the steering lever pull when steering When either steering lever is pulled back to dis engage a steering dutch the action of the booster spring trying to reach its free height exerts pres sure against the lower end of the steering lever and decreases the manual pull required to dis engage the steering dutch Each steering...

Page 215: ...ween the cowl and the top of the steering lever The difference between the two meas urements is the free travel of the steering lever If this distance is less than 1 or more than 3 an adjustment must be made D Adjustment of Linkage for Either Clutch 1 Remove the seat cushion 2 Loosen the jam nut of the adjustable yoke on the front end of the steering clutch con 217 AL trol rod extending from the s...

Page 216: ...r and tighten the jam nut 4 Adjust the steering lever booster for proper 218 booster action Refer to Fig 15 and loosen the hose damp at the rear of the booster boot loosen the jam nut on the eye bolt Turn the booster sleeve as necessary to obtain the proper booster action Tighten the jam nut on the eye bolt and tighten the hose clamp On the booster boot ...

Page 217: ...de adequate steering Do not attempt to use a steering brake for steering without first disen gaging the proper steering clutch Steering brakes may be used singly or together as service brakes to slow or stop the tractor when working on a grade Each steering brake assembly is provided with a parking brake lock lever for holding the brake pedal in the applied position for parking purposes Brake peda...

Page 218: ...rake pedal levers to strike the floor plate when the brakes are fully applied Brakes adjusted too tightly will cause heating unnecessary brake wear and loss of power When brakes are too loose they will not hold properly and will wear rapidly becouse of excessive slipping To odjust each of the steering brokes proceed as follows 1 Remove the brake adjusting hole cover from the steering dutch compart...

Page 219: ...d adjusting yoke 221 5 Remove the yoke pin connecting the rear end of the brake control rod to the top of the brake band lever 6 Remove the pipe plug from the side of the steering ciulch compartment in line with the brake band end pin which is located in the brake band adjusting yoke Using a suitable Va NC CGpscrew inserted through the open ing for the pip plug turn the capscrew into the tapped ho...

Page 220: ...ushings for wear Replace the necessary parts 4 Actuate each brake pedal lever to make certain that the pedal bracket needle bear ings are in good condition 5 Observe the pedal bracket dust seals lo cated at each end of the pedal bracket needle bearings for signs of excessive grease linkage and replace the seals if necessary 6 Before installing the steering brake band particularly after relining th...

Page 221: ...223 ...

Page 222: ...SEMBLY PINION SHAFT INNER BEARING ASSEMBLY SEALING WASHER HUB RETAINING LOCK HUB RETAINING CAPSCREW UB RETAINING WASHER PINION SHAFT BEARING CAGE INTERMEDIATE PINION INTERMEDIATE PINION INNER BEARING ASSEMBLY RETAINING LOCK INNER BEARING CAGE INNER BEARING COVER INNER BEARING COVER PACKING RING INNER BEARING ASSEMBLY TRACK SPROCKET SHAFT GEAR RETAINING LOCK SPROCKET SHAFT GEAR BEARING CAGE lUI I l...

Page 223: ... the shafts are adjustable by means of shims The pinion shaft bearings and the intermediate pinion bearings are lubricated by oil thrown by the gears Replaceable type bearing cages are provided for 225 the bearing cups of the final drive pinion bearings intermediate pinion bearings and for the inner and the intermediate bearings of the track sprocket shafts The final drive outboard bearings of the...

Page 224: ...ve the cotter pin and the outboard bearing retaining nut 6 Using puller tools similar to the ones shown in Fig 3 pull the final drive outboard bear ing cage and bearing from the track sprocket shaft Use care in handling and prevent damage to the oil seal rings 7 Remove the two 2 capscrews attaching the sprocket retaining nut lock to the sprocket and remove the nut lock and the sprocket retaining n...

Page 225: ...e the gear 11 If it is necessary to remove the sprocket shaft inner bearing cup the bearing cup and the inner bearing cage may be removed as a unit using tools similar to the ones shown in Fig 6 Press towards the final drive com partment on the track sprocket shaft inner bearing cover until the inner bearing cage is free of its bore in the housing then remove the inner bearing cup inner bearing ca...

Page 226: ...If it is necessary to remove the intermediate pinion inner bearing cup unlock and remove the capscrews attaching the intermediate pinion inner bearing cage to the housing Remove the inner bearing cage and the inner beoring cup as a unit 228 C Removed of Final Drive Pinion With the track sprocket shaft and gear and the intermediate pinion and intermediate shaft gear removed the final drive pinion m...

Page 227: ...ims Tie the adjustment shims to the outer bearing cage so that they will not be lost c Pull the final drive pinion into the steer ing clutch compartment and remove 229 FINAL DRIVE PINION SHAFT Drive Pinion Ittller Bearillg Cage ...

Page 228: ...track sprocket shaft inner and intermediate bearings is necessary Use tools similar to the ones shown in Figs 14 and 15 10 remove and install Ihe bearings on the shaft If the track sprocket shaft inner bearing cage and cover Were removed for replacement of the inner bearing cup use tools similar to the ones shown in Fig 11 to install the inner bearing cage and cOVer in Ihe final drive housing IMPO...

Page 229: ... BE RI IG PULLER HYDRAULIC ATTACHMENT I lg 13 Installing Pinion Shaft Outer Bearing 011 Final Drive Pinion Fig 14 Pulling Intermediat Bearing from Track Sprocket Shah 231 Fig 15 Installing Intermediate Bearing on Track Sprocket Shah ...

Page 230: ... to the one shown in Fig 7 IMPORTANT Keep the bearings clean B Adiustment of Track Sprocket Shaft Bearings 1 Install the inner bearing cover packing ring Neoprene in position on the sprocket shaft inner bearing cover Start the inner bearing cover and pocking ring in position in the bore of the final drive housing Install the inner bearing cup in position in the sprocket shaft inner bearing cage an...

Page 231: ...ENE cement do not use an excessive amount The NEOPRENE 233 cement and solvent for thinning can be purchased from your nearest Allis Chalmers Dealer f Clean and dry the inner machined sur face of the track sprocket and the other inner seal ring thoroughly Coat the machined surface of the track sprocket with NEOPRENE cement and imme diately install the inner seal ring gasket in position on the track...

Page 232: ...housing Do not tighten the outer 234 bearing cage retaining capscrews at this time 2 Lubricate the pinIon shaft bearings lower the pinion into the steering clutch compart ment and insert it into position in the final drive housing 3 Install a brake drum hub oil seal in position in the pinion shaft inner bearing cage with the sealing lip of the oil seal toward the pinion Install the pinion shaft in...

Page 233: ...e pinion and gear so thot the outer bearing cage can be installed In stall the outer bearing cage in the housing using the correct amount of bearing adjust ment shims as determined previously in INTERMEDIATE PINION BEARING ADJUST MENT When installing the outer bearing cage install it in the housing just far enough to start the attaching capscrews Use a bar and move the intermediate pinion out agai...

Page 234: ...ket shaft Coat the back face of the sprocket retaining nut face which contacts the sprocket with gasket cement or sealing compound Make certain the oil holes in the track sprocket retaining nut are not obstructed with the gasket cement or sealing compound then install the nut Tighten the sprocket retaining nut to a torque of 3500 to 4000 Ibs ft This may be accom plished by using the reduction of t...

Page 235: ...19 This will impose a torque of 3500 to 4000 Ibs ft on the sprocket retaining nut NOTE During this tighten ing procedure strike the sprocket as near to the hub as possible with a sledge hammer to make certain the sprocket is properly seated on the shaft The following is the approximate pounds pull required on the spring scale when using various length wrenches or bars to turn the universal joint t...

Page 236: ... ta the following dimensions 1 0 2 7 16 0 0 2 length 2W Press tne outboard bearing cage and bearing assembly onto the sprocket shaft to a position allowing 050 to 060 clearance between the two 2 outer oil seal rings IMPORTANT Do not allow the two 2 seal rings to contact as this will cause a drag between the seal rings thus a false reading will be obtained when checking the adiust ment of the outbo...

Page 237: ... position under the tractor Remove the blocking and lower the traclor onto the truck frame mak ing certain that the truck frame is positioned correclly under the traclor so that the hollow dowel for the truck frame pivot shaft enters the hole in the pivot shaft Also make certain that the sprocket shaft outboard bearing cage seats properly on the truck frame The truck frame outboard bearing upper c...

Page 238: ...and tighten the capscrews securely 14 Install the oil drain plug in the final drive housing Fill the final drive to the proper level with the specified lubricant 240 15 Install the fuel tank and connect the fuel lines 16 Couple the track and adjust refer to TRACK INSTALLATION Section XVII ...

Page 239: ... flange truck wheels are used in the number 2 and 5 positions and the single flange wheels in the number 1 3 4 and 6 posi tions as shown in Fig 1 INNER GUARD TRUCK OUTER GUARD Each truck frame assembly on the HD 9F and HD 9G long track models incorporates seven 7 truck wheel assemblies four 4 single flange wheels and three 3 double flange wheels The double flange truck wheels are used in the num b...

Page 240: ... spring seat to the truck frame Using a suit able hoist or jack raise the free end of the equalizing spring approximately ten 10 inches off the truck frame and block under the spring with suitable cribbing Remove the capscrews attaching the front support roller bracket to the truck frame and remove the support roller assembly 4 Raise the rear of the tractor approximately ten 10 inches and block un...

Page 241: ...lled make certain that the bushing is centered in the bore each end of the bushing being an equal dis tance from the outer ends of the bore in the truck frame __ Fig IS Installing Pivot Shaft Bushing_ c Install a new pivot shoft seal using another pivot shaft bushing as a seal installing sleeve as shown in Fig 7 Lubricate the pivot shaft and start it into the bushing make certain the oil hole in t...

Page 242: ...eels The truck wheels may be checked or removed with out uncoupling the track or removing the truck frame To check or remove a truck wheel assembly without uncoupling the track loosen the capscrews in the track adjustment screw lock and turn the adjustment screw into the track release yoke as sembly as far as possible Place blocks approxi mately 16 high in front of the track and move the tractor f...

Page 243: ...hammer and a chisel to spread the slot in the bracket then pull the bracket from the shaft 3 Wash the outside of the truck wheel thor oughly 4 IMPORTANT When disassembling the truck wheel keep the parts separated so that they can be reassembled in their original posi tions Remove the capscrews ottaching each bearing retainer to the truck wheel 5 Using special tools similar to the ones shown in Fig...

Page 244: ... remain flexible to follow the action of the springs in the seal spring assembly Examine the seal spring boot and make certain that the rubber is pliable and Ihe boot is in good condition If the boot and the seal ring are in good condition and are firmly cemented in place do not remove 5 Remove the inner seal rings from the bear ing retainers and examine the seal packing rings Replace the seaI pac...

Page 245: ...e an excessive amount The NEOPRENE cement and solvent for thinning can be purchased from your nearest Allis Chalmers Dealer f Install the seal packing ring in position 247 in the ring groove of the inner seal ring When installing make certain that the seal packing ring is not rolled into position thus twisting the ring in its groove g Clean the bore in the bearing retainer Place the steel boll in ...

Page 246: ...houlder of the shaft NOTE When install ing the seal retainers an the shaft be sure that the flat portion of each retainer is facing the chisel mark on each end of the shaft The chisel marks identify the top of the shaft and are in alignment with the cross drilled grease holes in the shaft 8 Insert a chisel or wedge in the split of the truck wheel attach ing brocket to spread the brocket for easier...

Page 247: ...LY ADJUSTMENT SCREW LOCK CRClSSlnEA D SEAL RELEASE SPRING HOUSING TAPP BLOCK MVU N COVER SEAL INNER SPRING ____________ Fig 18 Track Release Sectional View _____________ J A Maintenance Remove the oil filler plug from the track release housing and inspect the lubricant for contamination and proper level after every 200 hours of opera tion The oil level should be even with the bottom of the tapped ...

Page 248: ...far the crosshead show excessive wear replace the necessary parts 3 Inspect the release springs seat spring wash er release spring housing cover seal and the inner and outer springs for cracks and replace the necessary parts D Installation of the Track Release 1 Install the track release by a direct reversal of the removal procedure using new seals where necessary 2 Install the truck wheel the tru...

Page 249: ...0 Track Support Roller Se liona View 251 C Disassembly of Track Support Roller 1 Thoroughly wash and clean the outside of the support roller assembly 2 Remove the capscrews attaching the inner bearing retainer to the roller Using special tools similar to the ones shown in Fig 21 pull the inner bearing retainer and seal guard from the shaft Tie the adjustment shims to the retainer 3 Remove the caps...

Page 250: ... in place do not remove E Assembly of Track Support Roller 1 Make certain all the parts are dean 2 If a new seal spring assembly and seal ring is to be installed in the inner bearing re tainer they should be installed at this time so that the NEOPRENE cement used for cementing the assembly in place will have sufficient time to dry 3 Make certain the seal spring assembly and the seal ring gaskets a...

Page 251: ... and tighten the attaching capscrews securely 253 11 Install the outer bearing retainer and the original amount of adjustment shims in posi tion on the track support roller When tight ening the attaching capscrews turn the shaft occasionally to be certain that an excessive pre load is not being placed on the bearings The bearings are properly adjusted when a slight drag 15 to 45 inch pounds pre lo...

Page 252: ... carried on the track idler other than the section of track which it supports 3 Using a bar approximately five 5 feet long pry against the track idler bearing retainer and check for any end play If any end play is found the idler assembly should be re moved fram the tractor disassembled in spected and rebuilt NOTE If at any time grease is noted leaking from the seals the track idler should be remo...

Page 253: ... track idler 3 Remove the track idler assembly from the truck frame D Disassembly of Track Ieller 1 Remove the track idler guards and thor oughly clean the track idler 2 Remove the track idler guide plates and tie the guide adjusting sh ims to the plates to facilitate alignment of the track idler when it is reinstalled 3 Place the track idler assembly in a hori zontal position an blocks Using spec...

Page 254: ...ring are in good condition and are firmly cemented in place do not remOVe 5 Remove the inner seal rings from the bearing retainers and examine the seal packing rings Replace the seal packing rings if they are not in good condition F Assembly of Track Idler 1 Make certain all parts are clean 2 If a new seal assembly is to be installed in the idler brackets the seals should be in stalled at this tim...

Page 255: ...ng or removing bearing adiusfmenf shims do not add or remove shims on one side only The total thickness of the shims required should be divided as evenly as possible between the two sides 257 7 Coat the mating surfaces of the seal rings with clean oil Determine on which side of the tractor the idler is to be used so the idler shaft lubricating plug will be to the outside and the doweled end of the...

Page 256: ...rack Idler 1 Install the track idler on the truck frame 2 Install the track idler guide plates in their 258 original positions using the original adjust ing shim pack Sufficient adjusting shims should be added or removed to provide a sliding fit between the track idler brackets and the slide bars If necessary the track idler may be aligned with the track by mov ing adjusting shims from one track i...

Page 257: ...he locking pin coupling pin locking arm shaft and locking arm assembly and Wear shoes is supported by a supporting plate The sup porting plate is attoched to supporting plate brackets which are attached to the rear face of the steering clutch and final drive housing The drawbar is of the swinging type equipped with wear shoes and can be swung from side to side on the supporting plate or can be hel...

Page 258: ... pin bracket by removing the hinge pin retaining plate and the hinge pin 2 Remove the drawbar and supporting plate by removing the capscrews allaching each end of the supporting plate to the brackets Replace or repair any ports that show ex cessive wear B Installation The drawbor assembly may be installed by direct reversal of the procedure outlined under RE_ MOVAL AND INSPECTION _____ fig 2 Drawb...

Page 259: ... the grouser shoe bolts properly tig ltened the bolts should be tightened to a torque of 250 to 260 Ibs ft The rail links or side bars have only one wearing surface that being the surface which contacts the truck wheels track idler and the support rollers Usually however it becomes necessary to replace the pins and bushings before the rails wear out and it is a matter of iudgment then as to whethe...

Page 260: ...e interchanged thus presenting the better side of the sprocket teeth to the track bushings The pilch length distance between centers of pins of a new track is 7 1 16 and the maximum allow able pitch length for a used track is 7 3 16 Some owners have erroneously adapted the prac tice of removing one link in order to bring the track again within the range of the adjustment screw This should never be...

Page 261: ...n the side bar b loosen the capscrews in the adjusting screw lock and turn the adjusting screw into the track release yoke until the track is loose c Using special tools similar to the ones shown in Figs 3 and 4 remove the master pin from the track as follows 1 Attach the two 2 puller legs to the push puller with two 2 nuts 2 Insert the push puller with one leg through the idler and one leg to the...

Page 262: ...ken to protect the eyes from chips of steel which might occur when striking the master pin 3 Removal of Track from Under Truck Frame a Uncouple the track and move the tractor backward until the track is free of the track sprocket b Raise the truck frame free of track and pull the track out from under the truck frame C Track Installation 264 1 Place the track under the truck frame with the bushing ...

Page 263: ...n that the master pin is properly posi tioned for installation Support the outer end of the press assembly on blocks as shown in Fig 5 f Connect the hydraulic pump to the hy draulic ram and actuate the pump han dle until the ram has extended to its free length Slowly release the pressure from the hydraulic pump and at the SOme time turn the adjusting crank to move the forcing screw forward until t...

Page 264: ...he coolant C Equalizer Spring The equalizer spring is a leaf type spring wh ich pivots on a pin attached to the bottom of the main frame The weight of the front end of the tractor is transmitted to the truck frames through the equalizer spring The spring stabilizes the tractor and its mounted equipment by permitting the truck frames to oscil late Oscillating truck frames provide more uniform tract...

Page 265: ...rs and nuts and tighten securely 2 Remave the cribbing or jacks used to support the crankcase guard 4 EQUALIZER SPRING A Maintengnce Clnd Inspection Maintenance of the equalizer spring consists of periodic checks for loose bolts and excessive wear of the equalizer spring seats and the saddle as sembly If the spring saddle bolts are broken or will not tighten they should be replaced Broken spring l...

Page 266: ...lt assemble the spring leaves in a suitable vise or press Compress the spring leaves fully 2 Remove the guiding pin and install the Cen terboll and tighten securely 3 Install the rebound clip bolts compressing the spring as necessary 4 Remove the assembled spring from the vise and assemble the spring with the saddle assembly Tighten the saddle capscrews securely E Installation 268 1 Position the s...

Page 267: ...aise the front end of the tractor and block the main frame securely so that the rigid beam is raised approximately 4 off the truck frame Place blocks between the tops of the truck frames and the rigid beam mounting pads 5 Using special tools similar to the ones shown in Figs 2 and 3 pull the pivot pin from the main frame and the saddle 6 Remove the capscrews attaching the rigid beam to the main fr...

Page 268: ...tank and seat The rear fenders may be removed after removing the fuel tank with or without the battery boxes attached or the rear fender group battery boxes and the fuel tank may be removed as a unit after removing the attaching capscrews 2 SEAT The tractor is provided with an adjustable and removable seat Arm rest cushions are provided which also serve as battery box covers The seat cushion back ...

Page 269: ...271 ...

Page 270: ... ovailable speciol equipment contact your Allis Chalmers Dealer 2 GUARD EQUIPMENT The standard tractor is equipped with a full width crankcase guard bumper hinged type radiator grille truck wheel guards track idler guards and sprocket guards Additional protecting guards are available to protect vital ports of the tractor if they are desired A I ogging Guard Equipment Logging guard equipment for th...

Page 271: ...rd rear fenders and serve as mountings for the battery boxes fuel tank and the fuel tank and seat guard 273 2 Fuel Tank and Seat Guard Group The fuel tank and seat guard graup consists of a heavy guard and supporting angle designed to protect the fuel tank The guard is mounted on the heavy fenders special equipment and to the rear of the steering clutch and final drive housing ...

Page 272: ...3 Bottom Guard Group The bottom guard group consists of a heavy front section which replaces the standard crankcase guard and a heavy rear section which protects the transmission and the steer ing clutch and final drive housing The 274 bottom guard group gives the tractor a smooth underside and the tractor is less likely to ha ng up on stumps or rocks The bottom guard group is attached to the trac...

Page 273: ...___ 4 Grille Screen Heavy Mesh The heovy mesh grille screen for Models HD 9B and HD 9F is attached to the outside of the hinged type radiator grille ond does 275 not interfere with the opening ond dosing of the grille NOTE This screen is not to be used on troctors equipped with 0 push type fon ...

Page 274: ...iator shell and the cowl The screens protect the engine from debris with a minimum of air restriction NOTE The side screens cannot be used on tractors equipped with hydraulic dozers B Radiator Screen Fine Mesh The fine mesh radiator screen for Models HD 9B and HD 9F is attached to the front of the radiator shell along with the radiator assembly NOTE This screen is not to be used on fractors equipp...

Page 275: ...AN A pusher type fan is available as a substitute for the standard fan if tractor operation makes its use desirable NOTE All Model HD 9G tractors Seriol Nos 554 and above are equipped with the pusher type fon Installation Remove the suction fan and fan spacer refer to REMOVAL OF FAN Section IV Discord the fan spacer and suction fan attaching capscrews Install the pusher type fan and secure with fo...

Page 276: ...hree 3 thread cutting screws and lockwashers 2 Remove the pipe plug from the oil pressure gage tee and install the hour me er pressure switch 3 Refer to Fig 7 and connect the hour meter ground cable to the screws attaching the dash light base to the instrument panel Con nect the other cable of the hour meter to the pressure switch terminal Connect the pres sure switch to ammeter cable to the other...

Page 277: ...HOUR METER THREAD CUTTING SCREW AMMETER TO GROUND PRESSURE SWITCH TO AMMETER CABLE Fig 7 Engine Hour Meter Pressure Switch ___________ l and Cable 279 ...

Page 278: ...ble to the terminal connection of the light 3 Remove the floor plate Thread the front section cable along the inside of the left fender and main frame terminal end toward the front and through the bottom of the cowl to the tractor light switch Attach the termi nal of the cable to the terminal of the light switch Install the fuse in the fuse holder and connect the twa cables together at the fuse ho...

Page 279: ... tractor at the same speed as the engine C Reversible Reduction Power Take OR The reversible reduction power take off is mounted to the rear of the steering clutch and final drive housing and is driven by the transmission top shaft The output shaft rotates clockwise at 430 R P M and counterclockwise at 335 R P M at 1600 R P M engine speed 9 MISCEllANEOUS In addition to the above special equipment ...

Page 280: ...icant B Topered Roller Beorings 1 Thoroughly clean and inspect the bearings for worn and pitted rollers and races 2 Inspect the outside of the bearing cup outer race and the inside of the cone inner race for marks which indicate creepage 3 Always set up a tapered roller bearing in accordance with the specifications IMPOR 282 TANT DO NOT EXPERIMENT A properly set up tapered roller bearing will give...

Page 281: ...t be removed and replaced 2 Use a press and a suitable sleeve or driver to install the bushings Ream the bushings to the specified dimensions when reaming is required 2 SHAftS AND SPLINES A Shafts Inspect all shafts for worn areas and make certain they are not twisted or bent B Splines 1 Inspect the splines of 011 shafts for roughness burrs and weor Remove all burrs and slight roughness from the s...

Page 282: ... a hammer 6 When a new oil seal is to be installed always soak it in warm engine oil for about 1 hour before installing This will lubricate the seal ing lip and make the lip pliable B Positive Type 1 The sealing surfaces of the seal rings posi tive type must be smooth and flat Scratches on the sealing surface no matter how slight may be conducive to leakage of lubricant If replacement of a seal ri...

Page 283: ...diator and the radiator shell mounting bolts properly tightened 11 FILTERS 1 Fuel filter elements should be changed after every 300 to 500 hours of operation or when the filters become clogged and a pressure of less than 20 pounds is indicated by the fuel pressure gage Engine oil filter elements should be changed each time the oil in the crankcase is changed or more often if con ditions warrant 2 ...

Page 284: ...ide of the engine free from deposits of oily dust which acts as an insula tion material and prevents cooling by radi ation 286 2 Make all adjustments as specified in this manual 3 Use only genuine ALLIS CHALMERS parts for replacement ...

Page 285: ...refer to this section to obtain information on the proper fits and tolerances 2 ENGINE Description Size of New Parts A Cylinder Liners 1 Inside diameter 4 2495 to 4 2505 2 Diameter of piston skirt 3 Clearance of piston with liner 4 Allowable taper 5 Allowable out of round when installed 6 Clearance liner with block 7 Height of cylinder liner above cylinder block Prior to Engine Serial No 4A 19529 ...

Page 286: ... be ground 6 Undersize bearings available for service 7 Crankshaft end play 8 Oversize rear main thrust washers available for service F Main Bearings 1 Number of main bearings in engine 2 Diameter inside of shell 3 Diameter of crankshaft main bearing jaurnals 4 Clearance shell and journal 5 Width of shell 6 Undersize bearings available for service 288 5ize of New Parts 6 00 3 610 to 3 620 1 5025 t...

Page 287: ...52 001 002 to 004 2 115 to 2 117 006 to 012 1 4996 to 1 500 1 5025 to 1 503 0025 to 0034 000 1 Valve lift 375 2 Angle of valve seat Prior to Engine Serial No 4A 19529 450 Effective with Engine Serial No 4A 19529 30 3 Width of valve face 3 16 4 Valve lash 009 at normal operating 5 Diameter of valve head 6 Diameter of valve stem 7 Diameter inside of valve guide 8 Clearance stem and guide 9 Valve sta...

Page 288: ...thrust washers available for service P Camshaft Size of New Parts Install New Part When Clearance Exceeds 5632 to 5637 3445 to 3455 002 to 004 8740 000 _ 0005 875 001 000 006 001 to 0025 004 004 to 006 1 061 t 000 001 1 062 001 000 001 to 003 0005 to 0016 006 015 003 to 008 Replace gears that have excessive backlash and that are pitted or scored 1 500 001 000 1 4980 l 0005 000 0015 to 003 004 to 0...

Page 289: ...drive gear hub 3 Clearance support assembly bushing with drive gear hub 4 End clearance support assembly bushing with drive gear hub 5 Backlash blower drive gear with camshaft gear S Lubrication Oil Pump 1 Radial clearance gears with pump body 2 End clearance gears with pump body 3 Backlash pump driven gear with intermediate gear 4 Backlash intermediate gear with crankshaft gear 291 Size of New Pa...

Page 290: ...haft bolts Cylinder head nuts Main bearing bolts Blower rotor gear relaining bolts Crankshaft end bolt Cam and balance shaft nuts Bearing retainer Io idler gear bolts Flywheel housing la idler gear hub and dummy hub bolls Waler pump drive coupling capscrew Blower drive coupling bolts Cam and balance shaft end bearing bolts Water manifold nuts Crankshaft front cover bolts 25 30 90 100 55 60 55 60 6...

Page 291: ...412 to 422 010 to 030 480 to 520 Ibs ft 175 to 200 Ibs ft 180 to 220 Ibs ft 5 BEVEL GEAR AND STEERING CLUTCHES 1 Pre load of steering dutch and bevel gear shaft bearings 2 Backlash between bevel gear teeth and bevel pinion teeth 3 Specified torque for tightening steering clutch driving hub retaining capscrew 4 Specified torque for tightening bevel gear attaching nuts 5 Specified standout of face o...

Page 292: ...cket shaft outer bearing 8 to 13 in Ibs or 001 to 002 tight 5 Specified torque for tightening drive sprocket retain ing nut 3500 to 4000 Ibs ft 6 Specified torque for tightening brake drum hub re taining capscrew 300 Ibs ft Install New Parts When Clearance Exceeds 7 TRUCK WHEELS TRACK SUPPORT ROLLERS AND TRACK IDLERS 1 Pre load of shaft bearings 15 to 45 in Ibs 2 Stondout each end of track idler s...

Page 293: ...ission and Gear Shift Steering Brakes Steering Clutches Equalizing Spring Final Drives Truck Wheels Support Rollers and Track Idlers Tracks Track Release Truck Frames 1 ENGINE Topic No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 A ENGINE WILL NOT TURN 3 Incorrect Oil Viscosity 1 Engine Is Locked or Seized This can be due to extended idle Or storage periods or to the improper preparation of the...

Page 294: ...ylinder Cutting Out Locate a missing cylinder as follows a Remove the engine hood and the rocker arm cover Check the adjustment of the exhaust valve lash as explained in EN_ GINE in Section IX Operate the engine at 600 to 800 R P M cutting out each fuel injector in turn by holding the in jector follower down with a screwdriver or a wood block A decrease in engine speed with the injector follower h...

Page 295: ...spected for leaks the valve stems for wear and sticking and check the cylinder head compression gaskets for leaks If these parts are found to be in good condition the leakage is taking place past the piston rings The pistons must then be removed and all the parts inspected and the correction made 297 NOTE When using a compression tester to check the compression pressures make certain that the gage...

Page 296: ...rious damage due to the excessive pressures accompanying the detonation Detonation is caused by the presence of fuel or lubricating oil in the air charge of the cylinders during the compression stroke Check for leaky fuel injectors incorrectly timed fuel injectors leak ing fuel connections in the cylinder head with ac companying crankcase dilution oil pull aver from the air deaner dogged cylinder ...

Page 297: ...ENGINE COOLING SYSTEM in Section IV 299 5 Tractor Overloaded Lighten load on tractor 6 Oil Cooler Clogged Clean or replace the oil cooler core refer to ENGINE LUBRICATING SYSTEM in Sec tion V J EXCIESSiVIELY FAST WEAR ON ENGINE PARTS 1 Oil of Unsuitable Grade Composi tion or Viscosity Change to a suitable oil refer to DESCRIP_ TION AND SPECIFICATIONS in Section I for lubricating oil specifications...

Page 298: ...ntact Test the spring tension with a small spring scale A ach the scale to each brush 300 directly under the head of the screw that attaches the brush to the arm If less than 36 oz pull will raise the brushes off the commutator the springs have lost tension and new springs must be installed 7 Commutator Dirty or Worn Inspect the commutator by removing the caver band If it is dirty or slightly groo...

Page 299: ... will be indicated by black smoke from the exhaust loss of power and hard starting Inspect for the following in turn 1 Air Cleaner Pipe Clogged Refer to ENGINE AIR INTAKE SYSTEM in Section III 2 Air Shut Off Valve Out of Adjustment Refer to ENGINE AIR INTAKE SYSTEM in Section 111 3 Blower Drive Shoft Broken Refer to ENGINE AIR INTAKE SYSTEM in Section 111 4 Air Poris in Cylinder Liners Clogged Cle...

Page 300: ...f the system and for repair or replace ment of inoperative units 2 Overheating Due to Loss of Coolant a After the engine has been allowed to cool down to normal operating tempera ture fill the radiator Inspect for and repair all external leaks found such as hoses gaskets etc Remove the radiator for repair if it is leaking b If no external leaks are present a cracked cylinder head or block leaking ...

Page 301: ...r the prevailing atmospheric temperature 4 Worn Bearings Worn main or connecting rod bearings will couse oil pressure to drop replace the bear ings refer to ENGINE in Section IX 5 lubricating Oil Pump Relief Valve or Oil Pressure Regulator Valve Stuck Open Inspect these valves refer to ENGINE LUBRICATING SYSTEM in Section V 6 Engine Oil Cooler Core Clogged Inspect and clean the oil cooler core ref...

Page 302: ...power and hard starting are indi cations of this condition 304 2 on Leaks Inspect for loose connections damaged gas kets and loose cylinder block end plates Make the necessary corrections 3 Crankshcdt Oil Seals Worn or Damaged Observe the front end of the engine while running the engine with the tractor standing still Oil leaking through the crankshaft front oil seal can then be seen Inspect to Se...

Page 303: ...or B LIGHTS AND WIRING 1 Lights If the headlight switch is turned to the On position and the headlights or tail light fail to burn look for a burned out fuse loose connections discharged batteries burned out bulbs or a damaged switch make the necessary corrections Dim lights may be due to low batteries poor ground connections or tarnished reflectors or lenses Use the same procedure to check for th...

Page 304: ...lutch Wern Out Replace the clutch refer to ENGINE CLUTCH in Section X B CLUTCH HARD TO ENGAGE 1 Clutch Improperly Adjusted Clutch adjusted too tight adjust clutch refer to ENGINE CLUTCH in Section X 2 Clutch linkage Binding Unless due to bent Or broken parts binding will in most cases be relieved by lubricating the clutch components os recommended C GEARS CLASH WHEN SHIFTING 306 1 Warped Pressure ...

Page 305: ...TING COLLARS SLIP OUT OF MESH IN OPERATION 1 Shifting Lever Locking Mechanism Worn Inspect for worn or broken shifting lock 307 plungers broken or weak springs or edges rounded off detent notches in shifter shafts refer to TRANSMISSION AND BEVEL GEAR in Section XI 2 Incorrect Positioning of Shifting Forks on Shafts Reset forks refer to TRANSMISSION AND BEVEL GEAR in Section XI 3 Shifting Forks Wor...

Page 306: ...oil leak refer to STEERING BRAKES in Section XIII 4 Brake linkage Binding Free linkage Clnd lubricate s Improper Use of Brakes Refer to OPERATORS MANUAL for instruc tions on proper use of brakes C LINING WEARS EXCESSIVE Y 308 1 Improper Adjustment Adjust brakes refer to STEERING BRAKES in Section XIII 2 Linkage Binding Free linkage and lubricate 3 Improper Use of Brakes Refer to OPERATORS MANUAL f...

Page 307: ...to STEERING CLUTCHES AND CONTROLS in Section XII B CLUTCHES SHIFT SIDEWAYS 1 Clutch Driving Hub Retaining Capscrew Loose Tighten capscrew refer to TRANSMISSION 309 AND BEVEl GEAR in Section XI 2 Bevel Gear Bearings Loose Adjust bearings refer to TRANSMISSION AND BEVEL GEAR in Section XI C UNABLE TO DISENGAGE CLUTCHES 1 Improper Adjustment Adjust linkage refer to STEERING CLUTCHES AND CONTROLS in S...

Page 308: ...ontacting Remove and inspect the follower spring as sembly and replace if necessary refer to FINAL DRIVESIf in Section XIV B NOISE IN FINAL DRIVE ASSEMBLY 1 Bearings Out of Adjustment Adjust bearings as explained in FINAL DRIVESIf in Section XIV 2 Final Drive Gears and Pinions Badly Worn or Broken Install new gears and pinions refer to uFINAl DRIVES in Section XIV 310 3 Insufficient Oil Supply Che...

Page 309: ... clean Use clean containers and be clean about servicing 2 improper Lubricant See Allis Chalmers aproved list of lubri cants 311 3 Not Serviced at Proper Intervals Service every 1000 hours of operation refer to OPERATORS MANUAL for instructions on servicing 4 Improper Lubricator Used Use proper lubricator furnished with tractor refer to OPERATORS MANUAL for in structions 5 Lubricant Leakage Repair...

Page 310: ...fer to TRACKS in Section XVII 2 Bady Worn Pins Bushings and Rails Install new track rail assembly refer to TRACKS in Section XVIi 18 TRACK RELEASE RElEASE MECHANISM DOES NOT FUNCTION PROPER Y 1 Release Spring Broken Replace spring refer to TRUCK FRAMES in Section XV 2 Improper Fit ef Track Idler Brackets on Track Idler Slide Bars Adjust by shimming between the lower slide bars and the truck frame ...

Page 311: ...o obtain the best results The use af special tools also helps the serviceman or mechanic to make the necessary repairs in the least amount of time 313 Special tools similar to the ones illustrated in this manual are manufactured by various tool manu facturers Contact your local Allis Chalmers Dealer for information regarding availability of the special tools ...

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