TM 5-3895-346-14
HYDROSTATIC SYSTEM
PUMP REPAIR
The end cap can now be lifted off the pump; however, be certain that the valve plate does not fall and become
damaged. If the valve plate tends to lift off with the end cap, hold it in place on the end cap and remove both
parts together. If the valve plate remains on the bearing plate, remove it at this time (refer to Fig. 5).
CAUTION
All surfaces exposed are critical and caution must be used to avoid damage.
Figure 5.
Figure 6.
Note that the end cap is sealed to the housing with both a gasket and an O-ring (refer to Fig. 6).
The end cap is actually an assembly consisting of a tapered bearing race (which is a slip fit-in the end cap) and
the valve plate locating pin. These parts should be removed from the end cap. There may or may not be a
shim located under the bearing race which should be removed (refer to Fig. 7).
Figure 7.
Figure 8.
The pump valve plate has two tapered slots, one at the top and one at the bottom of the plate. These slots are
on opposite ports for different shaft rotations (refer to Fig. 8).
The valve plate on the left in the picture is for left-hand (counterclockwise) rotation. The valve plate on the
right is for right-hand (clockwise) rotation (refer to Fig. 8).
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