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
e. Install the spacer onto the bearing plate (see Figure 29).
NOTE
Be sure the O-ring is installed between the bearing plate and spacer outer edge.
SPACER
O-RING
THRUST BEARING
BEARING PLATE
Figure 29. Thrust Bearing and Spacer Installation.
14. Inspect and (if necessary) replace the body (see Figure 30).
NOTE
Inside the pump body are removable, corrosion-resistant, metal cylinder liners.
These cylinder liners may need replacement if excessive corrosion and/or wear
occur. In addition, a body bearing supports the camshaft. If the body bearing is
damaged or excessively worn, the bearing will need to be replaced.
a. With the pistons removed, inspect the cylinder liners for corrosion.
NOTE
Corrosion inside the cylinder liner will cause wear and premature seal and/or
piston failure.
b. If abrasives have entered the pump or corrosion has occurred, scoring may be evident.
Replace the liners if needed.
c. Remove the cylinder liner as follows (see Figure 30):
1) Place the pump body on its side on a flat surface that will not scratch or
damage the body.
2) Insert the cylinder liner removal tool into the cam side of the cylinder liner.
3) Strike the cylinder liner removal tool with a plastic or rubber hammer to drive
the cylinder liner out for inspection or replacement.
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