TM 5-3895-346-14
HYDROSTATIC SYSTEM
REPAIR
Figure 27.
3. Install pin in control valve links and pump link.
4. Place washer in pin, install new cotter pin and spread.
REPLACEMENT OF ROTARY BYPASS VALVE AND MANIFOLD ASSEMBLY
REMOVAL
1. Prior to removal of rotary bypass valve and manifold assembly, remove all dirt and clean area where
bypass and manifold assembly is attached to end cap.
2. Place drain pan under manifold to catch oil.
3. Grasp the bypass valve to prevent it from dropping. Remove the four bolts holding bypass valve to
manifold. There is no gasket between bypass valve and manifold assembly. Sealing is obtained by O-rings
and backup rings (refer to Fig. 28).
4. Grasp manifold to prevent it from dropping and remove remaining two mounting bolts (refer to Fig. 29).
NOTE
Caution should be exercised during installation of these parts to prevent them from falling into unit. Lightly
coating parts with petroleum jelly (not grease) is advised.
5. Install valves to pump using the three shortest bolts in the back holes (refer to Fig. 26).
6. Install new O-rings in P.O.R. valve.
7. Install P.O.R. to displacement control valve with remaining six bolts and tighten all nine bolts to 10-11 lb
ft (13.56-14.92 Nm) torque.
8. Install two pressure override hoses to the valve and pump end cap. There is no gasket between manifold
and end cap. Sealing is obtained by O-rings and backup rings.
INSTALLATION
1. Use new O-rings and backup rings.
2. The two grooves side by side in manifold require an O-ring and backup ring. The O-ring goes into the
groove first. Then install the backup ring on top of the O-ring. The flat side of
the backup ring faces away from the
O-ring.
3. The remaining groove requires only an O-ring (refer to Fig. 30).
4. Place manifold against motor end cap. Install the two shortest bolts in the bottom two holes, being certain
O-rings did not slip from their grooves.
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