TM 5-3895-346-14
PUMP REPAIR
HYDROSTATIC SYSTEM
Install the O-ring on the O.D. of the housing, then slide it into place against the bronze sealing ring. Since this
is a spring-loaded assembly, it may be necessary to push against the aluminum housing to expose the retaining
ring groove (refer to Fig. 10).
Figure 10.
Figure 12.
Install the retaining ring with the beveled side out, putting the side opposite the tangs into the groove first. Be
certain that the retaining ring has snapped into its groove completely (refer to Fig. 11).
To remove the charge pump, loosen the four capscrews that form a rectangular pattern on the rear of the
charge pump.
Do not remove the screws at the top and bottom as these hold the segments of the pump together (refer to Fig.
12).
CAUTION
Protect exposed surfaces and ports to prevent damage and parts falling into main
pump.
Before removing the charge pump, mark its housing and the main pump end cap to insure proper orientation
when reassembling (refer to Fig. 12).
The charge pump lifts straight off the main pump. There is a spacer in the idler shaft bore that can slip out as
the pump is removed; be certain to control this spacer so it cannot fall into the main pump (refer to Fig. 13).
Figure 11.
Figure 13.
532
