6
Valve Replacement
Erratic or low-pressure operation may be the result of
debris in the Valves or Worn Poppets and/or Seats.
1. Remove the Plugs; then using needle nosed pliers,
remove the Valves (See Figure 10).
2. Remove and discard the old O-ring (See Figure 10).
3. Inspect the Valves for signs of debris and/or wear. If
worn or damaged, replace the Valves and install new
O-rings (See Figure 10).
4. Install the Plugs and tighten them to 25 ft. lbs.
[33.9 Nm] torque (See Figure 10).
Figure 10
Plug
Plug
O-ring
O-ring
O-ring
O-ring
Valve
Valve
Hydraulic Motor Repair Instructions
Figure 11
Tank Port
Adapter
Pressure Port
Adapter
Bypass Adjusting
Screw Nut
Bypass Adjusting
Screw
Socket Head
Cap Screws
Figure 12
Figure 13
Gerotor
O-ring
Motor End
Plate
Gerotor
Housing
O-ring
Motor
Body
Roll
Pin
Hydraulic Motor Disassembly
The work area should be kept as clean as possible to
prevent contamination of parts.
1. Place the Hydraulic Motor in a vise (See Figure 11).
2. Using a large crescent or 1-1/16" box wrench,
loosen but do not remove the Tank Port Adapter and
Pressure Port Adapter (See Figure 11).
3. Using a 9/16" box wrench, loosen the Nut on the
Bypass Adjusting Screw (See Figure 11).
4. Using a small screwdriver, remove the Bypass
Adjusting Screw from the Hydraulic Motor. (This will
remove the Adjusting Screw, Lock Nut, Washer, and
Gasket.) (See Figure 11.)
5. Using a 1/4" allen wrench, remove the Socket Head
Cap Screws from the Motor End Plate (See
Figure 11).
6. Grasp the Motor End Plate and Gerotor Housing by
the Tank Port Adapter and Pressure Port Adapter,
and with a rocking motion, remove the Motor End
Plate and Gerotor Housing; then, remove the Tank
Port Adapter and Pressure Port Adapter (See
Figure 12).
7. Remove the Gerotor Housing and both components
of the Gerotor (See Figure 13).
8. Remove both components of the Gerotor from the
Gerotor Housing (See Figure 13).
9. Using a flat instrument, such as a knife, remove the
O-ring from the Motor End Plate and Body (See
Figure 13).
