Remove the bearing race (8) from the end cap. The race is installed with a slip fit. Note that there may be shims
installed between the bearing race and the cap to adjust end play. Retain these shims for reassembly. Loss of
these shims will result in improper end play causing reduced bearing life and possibly reduced pump
Using a clam type bearing puller, remove the tapered roller bearing (8) from the shaft (30). Care must be taken
not to damage the cylinder block (10) surface or contaminate the unit during this operation. A spacer is also
required to protect the end of the pump shaft from damage by the puller screw.
Remove the end cap gasket (6) from the pump housing (23).
With the pump laying horizontally, slide the cylinder block assembly (10) off the shaft while holding the external
end of the shaft (30).
If the cylinder block assembly (10) does not remain together during removal, it can be reassembled at a later
time. (The rotating group consists of a retainer, retainer guide, washer, three pins, nine pistons and the cylinder
Remove the thrust plate (14) from its counterbore in swashplate (16). The thrust plate may be difficult to remove
due to the oil between the flat surfaces of the thrust plate and the swashplate. Avoid damaging all critical
With a punch or metal scribe, mark right and left trunnions (20) to insure reassembly to the correct side of the
Using a hex or internal hex wrench as needed, remove the three cap screws (19) from each trunnion.
Remove each trunnion by using a soft, blunt object to drive it out of the housing (23) from the inside. Remove o-
ring (21) from each trunnion.
After both trunnion assemblies have been removed, the swashplate (16) can be removed from the pump housing
Lift the spring retainer (17) and bias spring (18) out of the pump housing (23).
Once the swashplate has been removed, the shaft (30) can be easily removed from the end cap side of the
housing. The front bearing (29) is pressed onto the shaft and will be removed with the shaft. However, the
bearing race will remain in the housing.
The tapered bearing (29) can be pressed off the shaft (30) if necessary. Be careful not to damage the seal
diameter of the shaft while removing the bearing.
4-6.3.2 Cleaning, Inspection and Repair.
If the control (42, Figure 4-12) is not performing properly because of sticking or contamination, it can be further
disassembled for cleaning or repair. (Refer to Figure 4-13).