ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
HIGH PRESSURE PUMPS
a. Carefully clean the cam shaft.
b. Check the cam shaft seal surface for grooves, nicks, or burrs, which might damage the shaft
seal (see Figure 22).
CAM
KEYWAY
SEAL SURFACE
Figure 22. Cam Cleaning and Inspection.
2. Inspect and (if necessary) replace the bearing plate.
NOTE
To support the camshaft, a precision bearing was installed in the bearing plate at
the factory. If the bearing plate is damaged or worn, the bearing plate should be
replaced.
a. Remove and discard the O-rings. Inspect the bearing plate and all threads for damage,
delamination, etc.
b. Inspect the bearing for signs of wear or damage. Check if the bearing plate bearing is
within the (2.010 in.) requirement. If outside the requirement, replace bearing (see Figure
23).
c. To replace the bearing, press it out and press the new one in using the FMC P502677
bearing removal and installation tool.
d. The new bearing should be pressed in from the cam side of the bearing plate. Once
installed, the bearing should be flush with the cam side of the bearing plate.
BEARING PLATE BEARING
THRUST BEARING
HPP BEARING PLATE
MOUNTING FLANGE
Figure 23. Bearing Plate Bearing Inspection.
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