TM 5-3895-346-14
HYDROSTATIC SYSTEM
PUMP REPAIR
Adjust the housing to the height and rotational position as determined by the markings made during
disassembly (refer to Fig. 44).
Figure 44.
Figure 45.
The neutral (zero angle) position of the swashplate must now be checked using a depth micrometer (refer to
Fig. 45).
The thrust plate must be installed on the swashplate for this measurement. Measure the distance from the end
cap mounting face of the pump housing to the face of the thrust plate 90to the trunnions, at the outer edge of
the thrust plate. Take the same measurement at a point 180(opposite edge of the thrust plate) from the first.
These measurements must not vary more than 0.001 inch from each other (refer to Fig. 45).
If adjustment is required follow these steps (refer to Fig. 46).
Figure 46.
Figure 47.
1. Back out both servo housings until the spring load is released on the swashplate (check by rocking
swashplate).
2. Thread in each housing until spring load just starts to be felt on the swashplate.
3. Check measurements as described previously.
4. Thread each housing farther in until the measurements are within 0.001 inch of each other.
After adjustment has been completed, the retainers can be installed and peened into the locking slot on the
housing (refer to Fig. 47).
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