PROPEL TRANSMISSION
SUBSECTION 9B
as the first two numbers on the old valve. These valves are
interchangeable and can be reinstalled in either side of the
manifold as long as the pressure settings are the same (see
Figure 9B-21. Motor Removal and lnstallation
1. Move the propel brake switch to the ON position Stop
the engine and disconnect the battery ground cable.
2. Tag and disconnect the high pressure lines and the
motor case drain line. Cap all Iines and plug all motor open-
ings to prevent the entry of contaminants.
Figure 9B-22 High Pressure Relief Valve
3. Wrap a sling around the motor and attach a lifting de-
vice to the lifting sling. The motor weighs approximately
2. To remove the shuttle valve, remove the plugs from both
155 Ibs.
sides of the manifold. Remove the springs, washers, and
4. Remove the capscrews which attach the motor to the
spool from the manifold. All of these parts are interchange-
brake plate and pull the motor off the plate.
able and can be installed from either side of the manifold.
The spool and manifold are a select fit and must be re-
placed together. To install the shuttle valve, insert the spool
OVERHAUL
in the manifold, place a washer on each end of the spool,
GENERAL. These motors should be replaced as complete
then install both springs in place. Install the plugs and
units or repaired to the limits allowed by the service kits.
tighten. See Figure 9B-23.
Any repairs attempted beyond the kits ex-
plained below will void the warranty on the
motors.
The following overhaul instructions describe the proce-
dure for installing each of the kits.
SHAFT SEAL REPLACEMENT. The motor shaft seal re-
placement is identical to the pump shaft seal replacement
described earlier in this subsection.
HIGH PRESSURE RELIEF VALVE, SHUTTLE VALVE,
CHARGE RELIEF VALVE, AND MANIFOLD REPLACE-
MENT. To remove and reinstall the high pressure relief
valve, shuttle valve, charge relief valve, and the manifold,
proceed as follows:
1. The high pressure relief valves are cartridges that are re-
moved by unscrewing them from the manifold. These
valves are factory set and require no adjustment. The pres-
sure settings are the first two numbers stamped on the end
of the valve. Before reinstalling new valves in the manifold,
check that the two numbers on the new valve are the same
Figure 9B-23. Shuttle Valve Removal
9B-13
