Oliver 1755, 1855, 1955 Tractor Service & Repair Manual

SHOP MANUAL OLIVER & COCKSHUTT SERIES 1755, 1855, 1955 Also Covers MINNEAPOLIS-MOLINE SERIES G-850, G-940 NOTE: Servicing the MInneapolis-Moline Series G-850 can be accomplished by using the information contained in this manuai for Series 1755. To service Minneapolis-Moiine Series G-940, use information for Series 1855. SERiAL NUIVIBER LOCATION Tractor serial number plate is located on the rear side of the instrument panel support. Engine serial number is stamped on right flange of engine directly below the alternator. BUILT IN THESE VERSIONS Rowcrop Tricycle, Rowcrop Adjustable Front Axle, Rowcrop Utility, Wheatland and Four-Wheel Drive. Wheatland models are available with non-adjustable front axles only. INDEX (By Starting Paragraph) Series Series Series 1755 1855 1955 BRAKES 205 205 205 CARBURETOR 86 86 CLUTCH Engine clutch adjustment .. 133 133 133 Engine clutch R&R 134 134 134 Engine clutch overhaul . 135 135 135 COOLING SYSTEM Water pump 125 125 125 Radiator 124 124 124 Thermostat 127 127 127 DIESEL SYSTEM Fuel supply pump , 115 115 115 Fuel system bleeding 96 96 96 Governor adjust 114 114 114 Nozzies. testing 102 102 102 Nozzles, R&R 101 101 101 Nozzles, overhaul 107 107 107 Injection pump, R&R 110 110 110 Injection pump, timing 109 109 109 Troubleshooting 93 93 93 DIFFERENTIAL Overhaul 198 198 198 Remove and reinstall 195 195 195 ELECTRICAL Distributor 129 129 Alternator 131 131 131 Regulator 131 131 131 Starting motor 132 132 132 ENGINE Assembly, R&R 55 55 55 Cam followers 61 61 61 Camshaft 66 66 66 Connecting rod and bearings 73 73 73 ENGINE CONT, Crankshaft and bearings Cylinder head Cylinder sleeves Flywheel Front oil seal Idler gear Main bearings Oil cooler ,., Oil pump Pistons Piston pins Piston and rod removal ., Piston rings Rear oil seal Relief valve, oil pressure , Rocker arms Tappets Timing gear cover Timing gears Valve guides Valve rotators Valve springs Valve timing Valves and valve seats . . . FINAL DRIVE Bevel gears Bull gears Bull pinions Differential Wheel axle shaft FRONT SYSTEM Four-wheel drive Front axle member Series 1755 74 56 68 77 75 65 74 82 78 68 72 67 71 76 81 62 61 64 65 58 59 60 63 58 199 203 204 195 201 13 1 Series 1855 74 56 68 77 75 65 74 82 78 68 72 67 71 76 81 62 61 64 65 58 59 60 63 58 199 203 204 195 201 13 1 Series 1955 74 56 68 11 75 65 74 82 78 68 72 67 71 76 81 62 61 64 65 58 59 60 63 58 199 203 204 195 201 13 1

Series Series Series FRONT SYSTEM CONT. 1755 1855 1955 Front boister 4 4 4 Pivot pin 1 1 t Spindle (knuckle) 6 6 6 Tie rods & toe-in 5 5 5 GOVERNOR Adjustment, non-diesel 119 119 Adjustment, diesel 114 114 114 Overhaul, non-diesel 123 123 R&R, non-diesel 123 123 HYDRA-POWER 145 145 145 HYDRAUL SHIFT 162 162 162 LIFT SYSTEM, HYDRAULIC Draft control spring, adjust 245 245 245 Draft input shaft 266 266 266 Drain and refill 240 240 240 External lift cylinders 271 271 271 Hitch control lever 265 265 265 Hydraulic housing 262 262 262 Lubrication and maintenance 239 239 239 Cylinder and piston 269 269 269 Manifold 267 267 267 Oil filter 241 241 241 Pump 256 256 256 Series Series Series LIFT SYSTEM CONT. 1755 1855 1955 Pressure relief valve 249 249 249 Ouick check 237 237 237 Remote cylinders 288 288 288 Remote valves 280 280 280 Rockshaft 263 263 263 Servo valve 267 267 267 System adjustments 243 243 243 Troubleshooting 225 225 225 POWER STEERING 40 40 40 POWER TAKE-OFF Control valve 219 219 219 Clutch overhaul 217 217 217 Drive shaft,R&R 215 215 215 PTOunit,R&R 216 216 216 TRANSFER DRIVE 32 32 32 TRANSMISSION Bevel pinion shaft 191 191 191 Countershaft 190 190 190 Input shaft 188 188 188 Lubrication system 176 176 176 Reverse idler 194 194 194 Shifter rails & forks 184 184 184 Top cover 183 183 183 TURBOCHARGER . 117 117 CONDENSED SERVICE DATA • Series Series Series GENERAL 1755 1855 1955 Engine Make Own Own Own Cylinders, No. of 6 6 6 Cylinder Bore—(nches 37/3 37/8 37/0 Stroke—Inches Non-Diesel 4 4 Diesel 4% 4% 4% Displacement—Cubic Inches Non-Diesel 283 283 Diesel 310 310 310 Compression Ratio: Gasoline 8.5:1 8.5-1 Diesel 16.0:1 16.5:1 16.0:1 Main Bearings No. of 7 7 7 Cylinder sleeves Type Wet Wet Wet Forward Speeds, No. of 6 6 6 Battery Terminal Grounded .. Negative TUNE-UP Firing Order 1-5-3-6-2-4 Valve Tappet Gap Inlet: Non-Diesel : 0.020 0.020 .... Diesel 0.030 0.030 0.030 Valve Tappet Gap, Exhaust: Non-Diesel 0.030 0.030 .... Diesel 0.030 0.030 0.030 Valve Face Angle, Degrees .. See Par. 58 Valve Seat Angle, Degrees .. See Par. 58 Ignition Distributor Make Holley Ignition Distributor Model ... —D-2563AA Generator and Regulator Make Delco-Remy Generator Model 1100808 Regulator Model 1119511 Starting Motor Make Delco-Remy Starting Motor Model: Non-Diesel 1108431 1108431 .... Diesel 1113139 1113656 1113656 Ignition Distributor Contact Gap 0.025 0.025 .... Ignition Distributor Timing (Static): Gasoline 0.025 0.025 Injection Pump Make Roosa-Master Injection Pump Timing (Static) 4° 4° T Carburetor Make -Marvel Schebler- .... TUNE.UP(Cont., Carburetor Model USX-44 USX-37 Engine Low Idle RPM aoo 800 Engine High Idle RPM 2640 2640 Engine Rated RPM ... 2400 2400 PTO RPM @ Engine Rated RPM: 540 rpm pto 549 549 1000 rpm pto 984 984 SIZES—CLEARANCES—CAPACITIES Crankshaft Journal Dia 2.624-2 625 — Crankpin Diameter 2 4365-2 4375 Rod Length 6.749-6.750- Camshaft Journal Diameter: Front 1.749-1.750— Others 1.7485-1.7495 Piston Pin Diameter 1.2494-1.2497 Valve Stem Diameter: Inlet 0.372-0.373- Exhaust 0.371-0.372 — Piston Ring Side Clearance See Par. 71 — Main Bearing Clearance 0.0015-0.0045 Rod Bearings Clearance 0.0005-0.0015 Piston Skirt Clearance See Par. 70— Crankshaft End Play 0.0045-0.0095 Camshaft Bearing Clearance See Par. 66 — Cooling System—Gallons 5 5 Engine Crankease w/filter—Ots 9 9 Fuel Tank, Gasoline—Gals. .. 35 35 Fuel Tank Diesel—Gallons ... 35 35 Transmission and Final Drive—Ots 43 43 Transfer Case—Quarts 1 1 Hydra-Power Drive—Quarts .. 6 6 Hydraulic Lift—Quarts 27 27 Diff. Housing (4WD)— Quarts 8 8 Planetary Drive (4WD)—Qts .. 2.5 2.5 TIGHTENING TORQUES—Ft.-Lbs. Cylinder Head: Non-Diesel 129-133 Diesel —See Par. 57 — Main Bearings 129-133 Connecting Rods 44-46 Flywheel 67-69 Series 1955 ' 800 2640 2400 549 984 9 35 35 43 1 6 27 8 2.5

Paragraphs 1-2 OLIVER FRONT SYSTEM (AXLE TYPE) AXLE MAIN MEMBER AND PIVOT PIN Rowcrop Models 1. Rowcrop tractors may be equipped with an adjustable front axle as shown in Fig. 1. The center main member (16) is carried on a pivot pin which is retained in front support (carrier) by a pin. To remove the front axle, stay rod (26) and wheels as an assembly, support front of tractor, then unbolt stay rod support (32) from front main frame. Disconnect inner ends of tie rods from center steering arm. Remove pivot pin from front support (Fig. 3) and axle, raise front of tractor and roll front axle and wheels assembly from under tractor. Remove nut from rear of stay rod and remove stay rod support (32—Fig. 1). Bushings (31) and (17) should be reamed, if necessary, to provide 0.001- 0.002 diametral clearance on pins. Fig. 1-Exploded view of Rowcrop adjustable front axie assembiy used on Se- ries 7755, t855 and t955. 1. Steering knuckle 2. Thrust washer 3. Bushing 4. Axle extension 6. Felt washer 7. Steering arm 8. Nut 10 Washer 11. "IT'bolt 14. Lock pin 16. Center member 17. Pivot hushing 26. Stay rod 27. Nut 31. Bushing 32. Support Ftg. 2-Expioded view of Short Wheei Base (Utility) front axle assembiy. 1. Steering knuckle 2. Thrust washer 3. Bushing 4. Axle extension 6. Felt washer 7. Steering arm 8. Nut 10. Washer 11. "IT'holt 14. Lock pin 15. Thrust washer 16. Center memher 31. Bushing 32. Support 33. Pivot pin 34. Washer (shim) Short Wheel Base Models 2, Short wheel base model tractors are equipped with the axle shown in Fig. 2. Axle rear pivot pin (33) is sepa- rate and is retained in rear support (32) by a set screw. The axle front pivot pin is integral with axle center member and is carried in a bushing (11—Fig. 4) fitted in axle carrier (3). Bushings for pivot pins are presized and should not require reaming if carefully installed. O_6 Fig. 3~Carrier (boister) used when tractor is equipped with adjustable axie shown in Fig. 1. 1. Seal 2. Bearing 3. Carrier 4. Steering arm 5. Shaft 6. Seal 7. Bearing 8. Washer 9. Lock pin 10. Pivot shaft Fig. 4~Carrier used on Short Wheel Base modei tractors. 1. Seal 2. Bearing 3. Carrier 4. Steering arm 5. Shaft 6. Seal 7. Bearing 11. Bushing

SERIES 1755-1855-1955 Paragraphs 3-8 To remove front axle and wheels as an assembly, support front end of tractor and disconnect tie rods from center steering arm (4). Remove rear support (32—Fig. 2) and thrust washer (15) and slide axle rearward out of front support (3—Fig. 4). Bushings (11 and 31—Fig. 2) can now be renewed. When installing bushings, be sure grease holes in bushings are aligned with grease fittings. Be sure to install shim washer (34) during reassembly. Wheatland Models 3. Wheatland model tractors have a non-adjustable front axle which is fitted with rotating spindles as shown in Fig. 5. To remove axle, stay rod (19) and wheels as an assembly, support front end of tractor, remove stay rod support (17) or stay rod nut (22), and disconnect tie rods from center steering arm (4—Fig. 6). Remove cap screw which retains pivot pin (10) in front support (3), drive pivot pin from front support and axle, then raise front of tractor and roll front axle and wheels assembly from under tractor. Stay rod bushing and pivot pin bushing can be renewed and should be reamed, if necessary, to provide 0.001- 0.002 diametral clearance. FRONT AXLE CARRIER Series 1755-1855-1955. 4. Front axle carriers (bolsters) are shown in Figs. 3, 4 and 6. To remove front carrier, remove front axle as outlined in paragraph 1, 2 or 3 and the power steering cylinder as outlined in paragraph 48, then unbolt carrier from tractor main frame. Remove clamp bolt from steering arm, then remove steering shaft and thrust washer (when used) from carrier. Remove oil seals, then note location of bearings prior to driving them out. When installing new bearings, drive or press on lettered end of bearing cage only and be sure oil holes in bearing cages are aligned with lubrication fittings when bearings are installed. Seals are installed with lips toward ends of steering shaft (outward). TIE RODS and TOE-IN All Axle Models 5. Tie rod ends are the non-adjustable type and are serviced either by renewing the end assembly or the complete tie rod assembly. Toe-in for all axle type models is 3/16-inch. Obtain correct toe-in by adjusting each tie rod an equal amount. STEERING KNUCKLES AND BUSHINGS Rowcrop and Short Wheel Base Models 6. To remove steering knuckles and renew bushings (3—Fig. 1 or Fig. 2), support front end of tractor and remove tire and wheel assembly. Straighten tab of washer (10) and remove nut (8). Remove steering arm (7) from knuckle and withdraw knuckle from axle extension (4). Fig. S~Expioded view of front axle assembly used on Wheatiand model tractors. 1. Spindle 2. Wear cup 3. Seal 4. Outer bearing 5. Spindle carrier 6. Plug 7. Bearing 8. Seal 9. Thrust washer 10. Thrust bearing 11. Inner bearing 12. Nut 13. Cotter pin 14. Cap 15. Pivot pin 16. Grease rating 17. Support 18. Bushing 19. Stay rod 20. Main member 21. Bushing 22. Nut Drive bushings (3) from axle extension and install new bushings flush with bore. Bushings are presized and reaming should not be necessary if bearings are installed with a suitable driver. Thrust washer (2) can be installed either side up. Insert knuckle into axle extension, install new felt (6), then on Rowcrop models, install steering arm (7) extending to rear and at approximately 90 degrees to wheel spindle. On Short Wheel Base models, install steering arm (7) extending to front at approximately 90 degrees to wheel spindle. LIVE SPINDLES AND SPINDLE CARRIERS Wheatland Models 7. SPINDLES. Front wheels on Wheatland models are attached to live (rotating) spindles (1—Fig. 5) which are carried in tapered roller bearings mounted in the spindle carriers (5). Spindles can be removed by removing the cap (14) from inner side of spindle carrier and removing the cotter pin (13) and slotted nut (12) from inner end of spindle. Refer to paragraph 9 for bearing and seal service information. 8. SPINDLE CARRIERS. To renew the spindle carrier pivot pin (15 —Fig. 5) and/or pivot pin needle bearings (7), first remove wheel and disconnect tie rod outer end from carrier. Remove nut from bottom end of pivot pin and drive the pin up out of axle (20) and carrier. Drive bearings (7) from carrier and install new bearings by driving or pressing on lettered end of cage only. To renew carrier, remove O—^8 S~View of carrier used on Wheatland model tractors. 1. Seal 2. Bearing 3. Carrier 4. Steering arm 5. Shaft 6. Seal 7. Bearing 8. Washer 10. Pivot pin

Paragraphs 9-12 OLIVER spindle as outlined in paragraph 7. When reassembling, renew seal (8) and, if damaged, renew thrust bearing (10) and washer (9). Refer to paragraph 9 for wheel bearing and seal information, WHEEL BEARINGS AND SEAL Series 1755-1855-1955 9. Refer to Fig. 7 for exploded view of Rowcrop and Short Wheel Base model front wheel bearing and seal installation and to Fig. 5 (items 1 through 14) for Wheatland models. To install new seal (3—Fig. 5, or 2— Fig. 7), first apply thin coat of gasket sealer to outer metal rim of seal. On Fig. 7~Expioded view of front wheei hub, bearing and seat assembly used on Rowcrop and Short Wheel Base tractors. 1. Wear cup 6. Outer bearing 2. Seal 7. Nut 3. Inner bearing 8. Cotter pin 4. Huh 9- Gasket 5 Plug 10. Hubcap Rowcrop or Short Wheel Base model, install seal in wheel hub (4—Fig. 7) with Oliver ST-97 or ST-145 Seal Driver and ST-125 Mandrel or equivalent tool. On Wheatland model, install seal in spindle carrier (5—Fig. 5) with Oliver ST-123 or ST-146 Seal Driver and ST-125 Mandrel or equivalent tool. Apply thin coat of gasket sealer to inside of seal wearing cup (1—Fig. 7 or 2—Fig. 5) and install wearing cup on spindle using Oliver ST-98 Driver on Rowcrop or Short Wheel Base model, or ST-124 Driver on Wheatland model. Face of cup must be smooth and Oat after installation. When reassembling wheel hub or spindle carrier the bearings should be packed with y2-pound of lithium base multi-purpose grease. Threads of plug (5—Fig. 7) in wheel bub or (6—Fig. 5) in spindle carrier should be coated with gasket sealer or white lead if plug has been removed. To adjust wheel bearings, tighten nut until definite drag is felt when rotating wheel, then back nut off to remove preload. Continue to tighten and loosen nut until a point is located where torque required to tighten nut definitely increases, then tighten nut from this point to where cotter pin can be installed. Bearing adjustment is correct when torque of 20 inch-pounds is required to rotate wheel. Renew gasket (9—Fig. 7) when installing cap on Rowcrop or Short Wheel Base model hub. Install grease retainer (4) with ridge upward and drive upper bearing cup in firmly against retainer. Drive lower bearing cup in firmly against shoulder in bottom of bore. Pack cone and roller assemblies of both bearings with No. 1 multi-purpose grease and pack V2- pound of same type grease in cavity above lower bearing cup in column. Install new felt (2) and retainer (3) on axle post, then drive cone and roller of lower bearing firmly against shoulder of axle post. Insert axle post in column and install upper bearing cone and roller assembly. Install seal (1) with lip up (away from bearing), lubricate seal contact surface of nut (5) and install nut for proper bearing adjustment as outlined in paragraph 10. FRONT SYSTEM (TRICYCLE TYPE) 10. ADJUST AXLE POST BEAR- INGS. To adjust the axle post bearings it will be necessary to remove tbe power steering cylinder as outlined in paragraph 48. If unit has been disas- sembled, be sure that bearing cups and cones are fully seated, then adjust nut (5—Fig. 8) so that axle post bearings have a preload of 70-80 inch- pounds, including the seal drag. Stake nut to slot in axle post when bearings are properly adjusted. 11. R&R FRONT SUPPORT. To remove tbe tricycle front support (ped- estal), it will first be necessary to remove the power steering cylinder as outlined in paragraph 48. Support tractor and remove cap screws retaining support (column) to tractor main frame. Raise front of tractor and remove unit. 12. OVERHAUL FRONT AS- SEMBLY. Remove assembly from tractor as outlined in paragraph 11. Refer to Fig. 8 for exploded view of unit, Unstake and remove nut (5), then bump or push axle post (11) from upper bearing (6) and column (7). Remove cone and roller assembly of lower bearing (6), felt retainer (3) and felt (2) from axle post. Remove seal (1), bearing assembly (6) and grease retainer (4) from upper bore of column and drive cup of lower bearing (6) from bottom of bore. Carefully inspect all parts and renew any that are excessively worn, scored or damaged. Reassemble unit using new seal (1), felt (2) and grease retainer (4) as follows: 4 i Fig. 8-Expioded view of support (column), bearings and axle post used on tricycle model tractors. 1. Seal 2. Felt washer 3. Felt retainer 4. Grease retainer 5. Nut 6. Bearing assy. 7. Support 11, Axle post Fig. tO-View showing one pinion assembiy removed from planet spider. 6

SERIES 1755-1855-1955 Paragraphs 13-16 FRONT SYSTEiVI (Front-Wheel Drive Axie) Series 1755,1855 and 1955 tractors are avaifabie with a front drive axie which is driven from the transmission bevel pinion shaft via a transfer case and a drive shaft fitted with two universal joints. A shifting mechanism in the transfer case allows connecting or disconnecting power to the front drive axie. Ail four-wheel drive tractors are equipped with power steering. Aii models are equipped with a Saginaw Hydramotor steering unit. Refer to POWER STEERiNG section for information on the Saginaw Hydramotor and the two steering cyiin- ders. FRONT AXLE AND CARRIER All Models So Equipped 13. R&R AXLE ASSEMBLY. The complete front axle assembly can be removed from tractor as follows: Re- move drive shaft shield and shield front support. Disconnect drive shaft from companion flange of differential pinion shaft. Disconnect both power steering cylinders from axle and spindle supports and lay cylinders on top of axle carrier. Remove bolts retaining axle to axle carrier, then raise tractor and roll the complete axle and wheels unit forward and away from tractor. Note: A rolling floor jack can be placed under differential pinion shaft to keep axle from rotating as tractor is lifted from axle. If necessary, wheels and tie-rod can now be removed and procedure for doing so is obvious. Reinstall axle by reversing the removal procedure and be sure piston rod ends of steering cylinders are attached to steering spindle supports. Tighten the cylinder attaching bolt lock nuts until they just contact the mounting flanges. Further tightening may distort mounting flanges and cause cylinder to bind. 14. R&R AXLE CARRIER. To remove axle carrier, first remove the front axle as outlined in paragraph 13, then, secure steering cylinders to tractor frame. Place a rollingfloorjack under axle carrier and take weight of carrier. Remove pivot pin retaining cap screws, slide pivot pins from pivot supports and lower the axle carrier from tractor. If necessary, pivot supports can be removed from tractor frame. Bushings in axle carrier can now be renewed. Bushings are pre-sized and should not require reaming if carefully installed. 15. OVERHAUL FRONT AXLE. Overhaul of the front drive axle assembly will be discussed as four operations; the planet spider assembly, the hub assembly, the spindle support assembly and the differential and carrier assembly. All operations except the differential and carrier overhaul can be accomplished without removing the front drive axle from tractor. Both outer ends of axle are identical, hence, only one outer end will be discussed. 16. PLANET SPIDER. To overhaul the planet spider assembly, support outer end of axle and remove the tire and rim. Remove relief valve from center of planet spider, remove plug from wheel hub and drain oil from planet spider. Remove capscrews that retain planet spider to wheel hub and the two puller hole cap screws. Use two of the removed retaining cap screws in the puller holes to remove planet spider assembly from wheel hub. With unit removed, remove the three pinion shaft lock pins by driving them toward center of unit. Remove pinion shafts and expansion plugs by driving pinion shafts toward outside of planet spider. Remove planet pinions, rollers (34 in each pinion) and thrust washers. Discard the expansion plugs. Refer to Fig. 10. 14 15 Fig. 11-Cross-sectional view tion axles have a one-p/ecc 1. Internal gear hub 2. Thrust washer 3. Pinion shaft lock pin 6. Wheel hub 7. Hub inner bearing 8. Dirt shield 9. Spindle 10. Spindle support 11. LTp per trunnion 12. Grease fitting 13. Shims 14. Universal joint 15. Upper trunnion bearing 29 showing components of front drive axle outer end. Current produc- ' internal gear and hub instead of the two-piece assembly shown above. 16. Grease retainer 17. Thrust washer 18. Oil seal 19. Axle shaft (inner) 20. Washer 21. Axle housing 22. Lower trunnion bearing 23. Dust seal retainer 24. Dust seal 25. Spring 26. Felt seal 27. Retainer ring 28. Seal retainer 29. Gasket 30. Shims 31. Lower trunnion 32. Thrust washer 33. Oil seal 34. Oil seal 35. Bushing 36. Axle shaft (outer) 37. Hub outer bearing 38. Thrust washer 39. Innernut 40. Lock washer 41. Outer nut 42. Filler hole plug 43. Planet spider 44. Snap ring 45. Relief valve 46. Sun gear 47. Pinion 48. Pinion rollers 50. Expansion plug 51. Thrust washer 52. Internal gear

Paragraphs 17-21 OLIVER Clean and inspect all parts and renew as necessary. Pay particular attention to the pinion rollers and thrust washers. 17. When reassembling, use heavy grease to hold rollers in inner bore of pinions. Be sure tangs of thrust washers are in the slots provided for them and that holes in pinion shaft and mounting boss are aligned before pinion shafts are final positioned. Coat mating surfaces of planet spider and wheel hub with No, 2 Permatex or equivalent sealer and install planet spider in wheel hub. Tighten retaining cap screws to a torque of 52-57 ft.-lbs. 18. HUB ASSEMBLY, To overhaul the wheel hub assembly, first remove planet spider assembly as outlined in paragraph 16. With planet spider removed, remove snap ring and sun gear from outer end of axle shaft. Straighten tabs of spindle nut lockwasher, then use OTC tool JD-4 or equivalent and remove spindle outer nut and lockwasher. Now loosen but do not remove the spindle inner nut. Unbolt spindle from spindle support and remove wheel hub assembly. Place hub assembly on bench with spindle nut on top side and block up assembly so spindle will be free to drop several inches. Remove the spindle inner nut, then place a wood block over end of spindle and bump spindle from internal gear hub. Lift internal gear hub and bearing from wheel hub and be careful not to allow bearing to drop from bub of internal gear bub. Complete removal of spindle from wheel hub. All bearings and seals, thrust washers and dirt shield can now be removed and renewed if necessary. Bushing and oil seal in mer bore of spindle (items 33 and 35 "%. 11) can also be renewed at this Use Fig. 11 as a reference and ible wheel hub unit as follows: rearing cups (7 and 37) in hub allest diameters toward inside inner bearing in inner bearing cup, then install oil seal (34) with lip facing bearing. Bump seal into bore until it bottoms. Place dirt shield (8) on hub so flat side is toward flange of spindle, then using caution not to damage seal, install spindle in wheel hub. Hold spindle in that position and turn unit over so threaded end of spindle shaft is on top. Place outer bearing over end of spindle and push bearing down into cup. Start bearing hub of internal gear (1) into outer bearing cone and, if necessary, tap gear lightly with a soft faced hammer to position. Install thrust washer (38) and spindle inner nut (39) and tighten nut finger tight. Coat mating surfaces of spindle and spindle support with No, 2 Permatex or equivalent sealer and install dirt shield and spindle on spindle support. Tighten retaining capscrews to a torque of 80- 88 ft.-lbs. Adjust inner nut as required until a pull of 33-38 pounds on a spring scale attached to a wheel stud is required to keep hub in motion. See Fig 12. Install lockwasher (40—Fig, 11) and outer nut (41), Tighten outer nut and recheck hub rolling torque. When adjustment is correct, bend tabs on lockwasher to secure both nuts. Install sun gear (46) and snap ring (44) on outer end of axle shaft. Coat mating surfaces of wheel hub and planet spider with No. 2 Permatex or equivalent sealer and install planet spider. Tighten retaining capscrews to a torque of 52-57 ft.-lbs. Install the puller hole capscrews and the tire and rim. 20, SPINDLE SUPPORT, The spindle support can be serviced after planet spider and wheel hub assembly are removed as outlined in paragraphs 16 and 18, However, if service is required only on the spindle support, the planet spider, wheel hub and axle shaft can be removed as a unit as follows: Raise outer end of axle and remove tire and rim. Attach hoist to wheel stud, then unbolt spindle from spindle support and pull complete hub assembly and axle shaft from outer end of axle. Refer to Fig. 16. Do not allow weight of assembly to be supported by axle shaft or damage to oil seal in axle housing outer end will result. With the complete hub assembly and axle shaft removed, disconnect tie- rod and power steering cylinder from spindle support. Remove the capscrews from the two-piece retainer ring on inner side of spindle support and sepa- rate the retainers, seals and gasket from spindle support as shown in Fig, 13, Note: At this time, it is desirable to remove the grease from cavity formed by spindle support and outer end of axle housing. Remove upper trunnion, pull top of spindle support outward and remove spindle support from outer end of axle housing. Keep shims present under top trunnion tied to the trunnion for use during reassembly. Remove upper trunnion bearing from axle housing. Remove lower trunnion, shims and bearing from spindle support. Both trunnion bearing cups and upper trunnion bearing grease retainer can now be removed if necessary. If necessary to remove axle shaft thrust washer, oil seal and oil seal washer from axle outer end, a slide hammer and puller attachment can be used. Seals (Fig, 13) on outer end of axle housing can also be removed at this time. Clean and inspect all parts and renew as necessary. It is recommended that new seals be used during reassembly, 21, To reassemble spindle support, proceed as follows: Install axle shaft seal washer and oil seal with lip toward inside and be sure oil seal is bot- tomed. Install axle shaft thrust washer. See Fig. 14. Install seal components over outer end of axle housing in the following order: Inner seal retainer with step toward inside of tractor; dust seal spring, rubber dust seal and felt grease seal and be sure thod shown to check the wheel 1 which should be 33-38 ibs. puii on spring scale. Fig. 13~Axle outer end seais and retainers are removed from spindie support as shown. Fig. 14~lnstatt seat washer, seat and thrust washer in the order shown.

SERIES 1755-1855-1955 Paragraphs 22-23 bevel in inside diameter of both seals is toward bell of axle outer end; outer seal retainer with step toward outside of tractor and gasket. Install grease retainer (cup side up) and upper bearing cup (smallest LD. down) in the upper trunnion bearing bore. Bolt lower trunnion to spindle support using original shims and tighten cap screws to a torque of 80-88 ft.-lbs. Place lower trunnion bearing over lower trunnion. Install lower trunnion bearing cup in outer end of axle housing with smallest LD. of cup up. Place upper trunnion bearing in the upper trunnion bearing cup, then while tipping upper side of spindle support slightly outward, position spindle support over outer end of axie housing and install upper trunnion with original shim pack. Tighten trunnion retaining cap screws to a torque of 80-88 ft.-lbs. Before attaching tie-rod, power steering cylinder or seal assembly to spindle support, check adjustment of trunnion bearings as follows: Connect a spring pull scale to tie-rod hole of spindle support and check pull required to rotate the spindle support. Refer to Fig. 15. Adjustment is correct when 12 to 18 pounds pull is required. To adjust bearings, vary number of shims located under the trunnions as required to obtain proper adjustment keeping the total thickness of shims under the top trunnion and lower trunnion as equal as possible. Shims are available in thicknesses of 0.003, 0.005 and 0.010. Use grease to hold seal retainer gasket in place, then install seal assembly on spindle support, being sure that the split ends of outer seal assembly do not align. Attach tie-rod and tighten tie-rod stud nut to a torque of 200 ft.-lbs. Attach power steering cylinder and tighten attaching bolt lock nut until it just contacts mounting flange. Place approximately four pounds of grease in the cavity of spindle support and pack universal joint of axle shaft. Coat mating surfaces of spindle and spindle support with No. 2 Permatex or equivalent sealer and install the planet spider, wheel hub and axle assembly on the spindle support. Tighten attaching capscrews to a torque of 80-88 ft.-lbs. Then, install tire and rim. DIFFERENTIAL AND CARRIER The Four Wheei Drive front axie can be equipped with either a conventionai dif- ferentiai assembiy or a "No-Spin" differ- entiai assembiy. Removai procedure wili be the same for both types. For service Information, refer to paragraphs 23 and 27. 22. REMOVE AND REINSTALL. To remove the differential and carrier assembly, raise front of tractor, block axle carrier to prevent front axle assembly from rocking and remove tires and rims. Drain differential housing. Disconnect power steering cylinders and lay them on top side of axle carrier. Remove drive shaft shield and shield front support. Disconnect drive shaft from companion flange of differential pinion shaft. Attach hoist to one of the wheel studs and take up slack of hoist. Un- bolt spindle from spindle support and pull complete assembly from outer end of axle housing. Refer to Fig. 16. Re- move opposite assembly in like manner. Fig. 16~Pianet spider, wheei hub and axie shaft assembly can be removed as shown. 1. Nut 2. Companion flange 3. Dirt shield 4. Oil seal 5. Bearing retainer 6. Gasket 7. Bearing cone 8. Bearing cup 9. Spacer and shim kit 10. Bearing cone 11. Pinion shaft 12. Pilot bearing 13. Carrier 14. Bearing cap 15. Bearing cone 16. Bearing cup 17. Adjusting nut 18. Thrust washer 19. Thrust washer 20. Pinion gear 21. Side gear 22. Differential case Note: Do not allow weight of hub assembly to be supported by axle shaft or damage to oil seal in axle housing outer end will result. Place a rolling floor jack under front axle, unbolt axle from axle carrier and lower the axle from tractor. Position axle on supports with differential pinion shaft up and secure assembly in this position with blocks. Disconnect one end of tie-rod and swing it out of way. Remove capscrews retaining differential carrier to axle housing and remove the assembly from housing. Reinstall by reversing removal procedure and coat carrier retaining capscrews and mating surfaces of carrier and axle housing with No. 2 Permatex or equivalent sealer. Tighten capscrews to a torque of 37-41 ft.-lbs. Tighten tie-rod stud nut to a torque of 200 ft.-lbs. When joining spindle to spindle support, coat mating surfaces with No. 2 Permatex or equivalent sealer and tighten retaining capscrews to a torque of 80-88 ft.-lbs. Piston rod end of power steering cylinders are attached to spindle supports. Tighten cylinder attaching bolt lock nuts until they just contact mounting flanges. 23. OVERHAUL. (CONVEN- TIONAL) With differential and carrier removed as outlined in paragraph 22, disassemble unit as follows: Punch mark carrier bearing caps (14—Fig. 17) so they can be reinstalled in original position, then remove cotter pins and the adjusting nut lock pins (25). Cut lock wires and remove the carrier bearing caps. Lift differential from carrier and keep bearing caps (16) identified with their bearing cones (15). Bearing cones can now be removed from differential case if necessary. Unbolt and remove bevel ring gear from differential case if necessary to renew gear. Drive pinion pin (shaft) lock pin out of differential case and remove pinion pin (23), pinions (20), side gears (21) and thrust washers (18 and 19) from differential case. 23. Pinion gear pin 24. Bevel ringgear 25. Lock pin 25 Fig. 15-Use a spring scaie In the tie-rod stud hole to check trunnion bearing adjustment. Fig. 17-Exploded view of the conventionai differential and carrier assembiy used on front drive axie of models equipped with four-wheei drive. 9

Paragraphs 24-28 OLIVER Remove cotter pin and nut (1) from pinion shaft (11), then using a puller, remove the companion flange (2) and dust shield. Remove pinion shaft bearing retainer (5) and press pinion shaft and bearing from carrier. Use a split bearing puller to support pinion bearing cup (8) on edge nearest pinion shaft gear and press pinion shaft from rear bearing and bearing cup. Remove spacer (9) and any shims which may be present from pinion shaft. Remove front bearing and inner (pilot) bearing (12) in a similar manner. Clean and inspect all parts. Pay particular attention to bearings, bearing cups and thrust washers. If any of the differential side gears or pinions are damaged or excessively worn, renew all gears and thrust washers. Pinion shaft and bevel ring gear are available in a matched set only. 24, The differential and carrier unit is assembled as follows: Place inner (pilot) bearing on inner end of pinion shaft and stake in four places. Use a piece of pipe the size of inner pinion shaft bearing race to press forward bearing cone (10) onto shaft with taper facing threaded end of pinion shaft. Place bearing spacer and any shims which were present during disassembly over pinion shaft, then position the bearing cup over forward bearing. Press the rear pinion shaft bearing (7) on shaft with taper away from threaded end of pinion shaft. Check and, if necessary, renew the dust shield (3) on companion flange. Posi- tion companion flange so it will not obstruct cotter pin hole in end of pinion shaft, slide bearing retainer oil seal on its land on companion flange, then press companion flange on pinion shaft. Install retaining nut, clamp companion flange in a vise and tighten nut to a torque of 300 ft.-lbs. Note: Pressure of oil seal will gener- ally hold bearing retainer away from bearing. If it does not do so, tie retainer to companion flange. 25, With pinion shaft assembled as outlined above, clamp the bearing cup in a soft jawed vise just tight enough to prevent rotation, then using an inch-pound torque wrench on companion flange retaining nut, check torque required to rotate pinion shaft. Pinion shaft bearing adjustment is correct if 13 to 23 inch-pounds is required to rotate shaft. If rolling torque is not as specified, disassemble the pinion shaft assembly and vary thickness of spacer and/or shims as required to obtain proper rolling torque, A spacer and shim kit is available under Oliver part number 155 342-A. With pinion shaft assembled and correct rolling torque (bearing adjustment) obtained, press pinion shaft assembly into carrier, install bearing retainer and tighten capscrews to a torque of 25 ft,-lbs. Install cotter pin to lock the nut in place, 26, Reassemble differential case assembly as follows: Place side gears, pinions and thrust washers in differential case and install pinion pin (shaft). Secure pinion pin with lock pin and, if lock pin is straight type, stake pin in position. It is not necessary to stake the spring type lock pin. If bevel ring gear was removed, reinstall with bolt heads on ring gear side of assembly and tighten the nuts to a torque of 78-86 ft,-lbs. Press bearings on differential case with tapers facing away from case. Place bearing cups over differential bearings and place differential assembly in carrier. Posi- tion bearing adjusting nuts in carrier and install the carrier bearing caps. Tighten the bearing cap screws until caps are snug but be sure threads of caps and adjusting nuts are in reg- ister. Maintain some clearance between gear teeth and tighten adjusting nuts until bearing cups are seated and all end play of differential is eliminated. Mount a dial indicator and shift differential assembly as required to obtain a backlash of 0,008- 0,011 between bevel pinion shaft and bevel ring gear. Differential is shifted by loosening one adjusting nut and tightening the opposite nut an equal amount. Note: Mesh position of the bevel pinion shaft is not adjustable. With gear backlash adjusted, tighten the bearing cap retaining capscrews to a torque of 65 ft,-lbs, and secure with lock wire. Install adjusting nut lock pins and cotter pins. Note: If lock pins will not enter slots of adjusting nuts after backlash adjustment has been made, tighten rather than loosen the adjusting nut, or nuts. Recheck gear backlash. Fig. 18~Exptoded view of the 'nO'Spin" differentiat case assembiy a v ait able for the four-wheel drive front axle. 1. Case half 2. Side gear 3. Spring 4. Spring retainer 5. Driven center 6. Hold-out ring 7. Central driver & center cam 8. Case half If used, install thrust screw and turn screw in until it contacts back side of bevel ring gear, then back screw out ^^ to y2-turn. Apply sealer to threads of thrust screw at surface of carrier, then while holding screw from turning, install locking washer and nut. Secure nut by bending one tang of locking washer over nut and another tang over boss of carrier, 27. OVERHAUL (NO-SPIN). With differential and carrier removed as outlined in paragraph 22, unit is dis- assembled as follows: Punch mark the carrier bearing caps (14—Fig, 17) so they can be reinstalled in their original positions, then remove cotter pins and the adjusting nut lock pins (25), Cut lock wires and remove the carrier bearing caps. Lift differential from carrier and keep bearing cups (16) identified with their bearing cones (15), Bearing cones can now be removed from differential case, if necessary. Remove cotter pin and nut (1) from pinion shaft (11), then using a puller, remove the companion flange (2) and dust shield. Remove pinion shaft bearing retainer (5) and press shaft and bearings from carrier. Use a split bearing puller to support pinion bearing cup (8) on edge nearest pinion shaft gear and press pinion shaft from rear bearing (7) and bearing cup. Remove spacer (9) and any shims which may be present from pinion shaft. Remove front bearing (10) and inner (pilot) bearing (12) in a similar manner. Unbolt and remove bevel ring gear from differential, if necessary. Remove differential case bolts and hold case together as last bolt is removed to keep assembly from flying apart due to the internal spring pressure. See Fig. 18, Hold out rings (6) can be removed with snap ring spreaders, 28, Clean and inspect all parts. Check splines on side gears and clutch members and remove any burrs or 4 • 10

SERIES 1755-1855-1955 Paragraphs 29-31 chipped edges with a stone or burr grinder. Renew any parts which have sections of splines broken away. In- spect springs (3) for fractures, or other damage, and renew springs which do not have a free height of 2V4-2^ inches. Center cam in central driver (7) must be free to rotate within the limits of keys in central driver. Check the weld between driven clutch (5) and cam ring on clutch by tapping lightly on cams of cam ring. If cam ring ro- tates in driven clutch, weld is defec- tive (failed). Inspect teeth on central driver and driven clutches. Small de- fects can be dressed with a stone. If central driver or driven clutch is renewed, also renew the part it mates with. A smooth wear pattern up to 50 percent of face width is acceptable for the cams on center cam and driven clutch. 29. The differential and carrier unit is assembled as follows: Place the inner (pilot) bearing on inner end of pinion shaft and stake in four places. Use a piece of pipe the size of inner race of pinion shaft bearing and press the forward pinion shaft bearing (10— Fig. 17) on shaft with taper facing threaded end of pinion shaft. Place bearing spacer, and any shims which were present during disassembly over pinion shaft, then position the bearing cup over forward bearing. Press the rear pinion shaft bearing (7) on shaft with taper away from threaded end of pinion shaft. Check, and renew if necessary, the oil seal (4) in pinion shaft bearing retainer (5). Seal is installed with lip toward inside. Place gasket and bearing retainer over pinion shaft. Check, and renew if necessary, the dust shield (3) on companion flange. Position companion flange so it will not obstruct cotter pin hole in end of pinion shaft, slide bearing retainer oil seal on its land on companion flange, then press companion flange on pinion shaft. Install retaining nut, clamp companion flange in a vise and tighten nut to a torque of 300 ft.-lbs. NOTE: Pressure of oil seal will gen- erally hold bearing retainer away from bearing. If it does not, tie retainer to companion flange. 30. With pinion shaft assembled as outlined above, clamp the bearing cup in a soft jawed vise only tight enough to prevent rotation, then using an inch-pound torque wrench attached to companion flange retaining nut, check the rolling torque (bearing preload) of the pinion shaft. This rolling torque should be 13-23 in.-lbs. If rolling torque is not as specified, it will be necessary to disassemble the shaft assembly and vary the spacer and/or shims as required. A spacer and shim kit is available under Oliver part number 155 342-A. With pinion shaft assembled and the rolling torque of shaft determined, press pinion shaft assembly into carrier, install bearing retainer and tighten cap screws to a torque of 25 ft.- lbs. Install cotter pin to lock nut (1) in place. 31. Lubricate all parts and reassemble no-spin differential by reversing disassembly procedure. Be sure to position spring retainers so that spring seats inside cupped section of retainer. Be sure key in central Fig. 19~Exploded view of the four-wheei drive transfer drive assembiy. Breather filter eiement (not shown) should be renewed yearly, or after each 1000 hours of operation. 12. Case 15. Filler plug 16. Drain plug 17. Gasket 18. Bearing retainer 21. "O"ring 22. Shim (0.004, 0.0075, 0.015) 23. Bearing 24. Shaft 25. Coupling 26. Gear (27 teeth) 27. Washer 28. Snap ring 29. Bearing 30. I>owels 31. Bearing 32. Idler gear 33. Snap ring 34. "O"ring 35. Oil seal 36. Gear 37. Snap ring 38. Seal 39. Stud bolt 42. Gasket 43. Cover 47. Gasket 48. Seal 49. Retainer 53. Seal 54. Spacer 55. Companion flange 56. Castellated nut 58. Shims (0.004,0.0075, 0.015) 59. "O"ring 60. Retainer 63. Shift fork & rod 64. Detent spring 65. Detent ball 66. Plug 67. Actuator 69. Woodruffkey 70. Seal 71. Arm 11

Oliver 1755, 1855, 1955 Tractor Service & Repair Manual

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