Before installing any shaft seal parts, wrap the shaft with a protective covering to protect parts from damage.
Then slide the sealing ring (8) over the shaft and onto the shaft pilot diameter with the O-ring (9) facing the
motor. Work the ring into place using hand force only.
Insert the stationary seal pilot (6) into the aluminum housing (3), locating the notch in the stationary seal over the
pin in the housing.
Install the O-ring (4) on the outside diameter of the housing (3) then slide it into place against the bronze sealing
ring (8). Since this is a spring loaded assembly, it may be necessary to push against the aluminum housing to
expose the retaining ring groove.
Install the retaining ring (2) with the beveled side out, putting the side opposite the tangs into the groove first. Be
certain that the retaining ring has snapped into its groove completely.
Install the manifold (11) on end cap (12) and install screws (10). Torque to 10-11 ft.-lbs.
4-10.2 Motor Manifold Valve Assembly. (Figure 4-30)
4-10.2.1 Repair. The manifold assembly contains the following valves: High Pressure Relief Valve Cartridges (5000 psi),
Shuttle Valve, and Charge Relief Valve (160/180 psi).
The high pressure relief valves (1) are cartridges that are removed by unscrewing them from the manifold.
These valves are factory set and the first two numbers of the pressure setting are stamped on the end of the
valve. These valves are interchangeable and can be installed in either side of the manifold. The seals (2) are
replaced as a kit.
To repair the shuttle valve, remove both hex plugs (3) and o-rings (4), springs (5), washers (6) and spool (7) from
the manifold (8). These parts are interchangeable and can be installed on either side of the manifold. The spool
(7) and manifold (8) are a select fit and must be replaced together. To install, slide the spool (7) into the bore,
place a washer (6) on each end, then slide both springs (5) in place. Install the hex plugs (3) and o-rings (4) and
To repair charge relief valve (9), remove plug (10) with setscrew (11), nut (12) and cap (13), o-ring (14), plunger
(15), spring (16), o-ring (17) and valve (18). To install, place new o-rings (14, 17) on plug (10) and plunger (15).
Place spring (16) in valve (18) and slide into bore. Install plunger (15) and plug (10).
Charge relief pressure is adjusted by removing cap (13), loosening nut (12) and turning setscrew (11) clockwise
to increase and counterclockwise to decrease relief pressure.
Remove plugs (19) and install new o-rings (20). Install new orifice (21) and o-rings (22 and 23).