Oil Pump and Reaction Shaft Support
DISASSEMBLYRemoving Pump Seal Ring:
1. Remove seal ring from housing and reaction shaft support.
2. Mark pump housing and support assembly for alignment reference.
Pump Support Bolts:
3. Remove bolts attaching pump body to support.
Separating Pump Housing From Reaction Shaft Support:
4. Separate support from pump housing.
Pump Gear Removal:
5. Remove inner and outer gears from reaction shaft support.
6. If pump seal was not removed during transmission disassembly, remove seal with punch and hammer.
Support Hub Thrust Washer:
7. Remove front clutch thrust washer from support hub.
OIL PUMP BUSHING REPLACEMENT
Removing Oil Pump Bushing:
1. Remove pump bushing with Tool Handle C-4171 and Bushing Remover SP-3551 from Tool Set C-3887-J.
2. Install new pump bushing with Tool Handle C-4171 and Bushing Installer SP-5117. Bushing should be flush with pump housing bore.
Staking Oil Pump Bushing:
3. Stake new pump bushing in two places with blunt punch. Remove burrs from stake points with knife blade afterward.
REACTION SHAFT SUPPORT BUSHING REMOVAL
Replacing Reaction Shaft Support Bushing:
1. Assemble Bushing Remover Tools SP-1191, 3633 and 5324. Do not clamp any part of reaction shaft or support in vise.
2. Hold Cup Tool SP-3633 firmly against reaction shaft and thread remover SP-5324 into bushing as far as possible by hand. Then thread remover tool 3-4 additional turns into bushing with a wrench.
3. Turn remover tool hex nut down against remover cup to pull bushing from shaft. Clean all chips from shaft after bushing removal.
4. Lightly grip old bushing in vise or with pliers and back remover tool out of bushing.
5. Assemble Bushing Installer Tools C-4171 and SP-5325.
6. Slide new bushing onto Installer Tool SP-5325.
7. Position reaction shaft support upright on a clean smooth surface.
8. Align bushing in bore. Then tap bushing into place until Bushing Installer SP-5325 bottoms.
9. Clean reaction shaft support thoroughly after installing bushing.
ASSEMBLY
1. Lubricate gear bore in pump housing with transmission fluid.
2. Lubricate pump gears with transmission fluid.
Supporting Pump And Installing Outer Gear:
3. Support pump housing on wood blocks.
4. Install outer gear in pump housing. Gear can be installed either way (it is not a one-way fit).
Pump Inner Gear Installation:
5. Install pump inner gear.
CAUTION: The pump inner gear is a one way fit. The bore on one side of the gear inside diameter (I.D.) is chamfered. Be sure the chamfered side faces forward (to front of pump).
6. Install new thrust washer on hub of reaction shaft support. Lubricate washer with transmission fluid or petroleum jelly.
Hub Seal Ring Position:
7. If reaction shaft seal rings are being replaced, install new seal rings on support hub. Lubricate seal rings with transmission fluid or petroleum jelly after installation. Squeeze each ring until ring ends are securely hooked together.
CAUTION: The reaction shaft support seal rings will break if overspread, or twisted. If new rings are being installed, spread them only enough for installation. Also be very sure the ring ends are securely hooked together after installation. Otherwise, the rings will either prevent pump installation, or break during installation.
Assembling Reaction Shaft Support And Pump Housing:
8. Install reaction shaft support on pump housing.
9. Align reaction support on pump housing. Use alignment marks made at disassembly. Or, rotate support until bolt holes in support and pump housing are all aligned (holes are offset for one-way fit).
10. Install all bolts that attach support to pump housing. Then tighten bolts finger tight.
11. Tighten support-to-pump bolts to required torque as follows:
a. Reverse pump assembly and install it in transmission case. Position pump so bolts are facing out and are accessible.
b. Secure pump assembly in case with 2 or 3 bolts, or with pilot studs.
c. Tighten support-to-pump bolts to 20 Nm (15 ft. lbs.).
d. Remove pump assembly from transmission case.
Pump Oil Seal Installation:
12. Install new oil seal in pump with Special Tool C-4193 and Tool Handle C 4171. Be sure seal lip faces inward.
13. Install new seal ring around pump housing. Be sure seal is properly seated in groove.
14. Lubricate lip of pump oil seal and O-ring seal with transmission fluid.