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
NOTE
The valve housing contains pairs of disk check valves above each piston to rectify
the flow through the pump. The failure of a valve will drastically affect the
performance of the pump.
The disk check valves can be easily removed from the valve housing by inserting a
narrow rod through the holes in the bottom of the valve housing and pushing the
valves out the top of the housing.
7. Remove and discard the old disk check valves from the valve housing (see Figure 11).
INSTALL OUTER VALVES METAL END UP
INSTALL INNER VALVES PLASTIC END UP
VALVE HOUSING
TOP OF VALVE HOUSING
BOTTOM OF VALVE HOUSING
Figure 11. Disk Check Valve Replacement.
8. Inspect the valve housing for any cracks, de-lamination or damage. Replace the valve housing
assembly if any de-lamination or obvious damage is visible.
9. Install new pairs of valves into the valve housing from the kit as follows (see Figure 12):
NOTE
If a valve does not easily push in flush with the valve housing, place a soft, flat
material, such as a small, flat piece of wood over the valve and gently tap the wood
until the valve is fully inserted and the top is flush with the surface of the valve
housing. Do not tap directly on the valve.
a. Install the outer valves into the holes plastic end first so that the metal end of the valve
faces up.
b. Install the inner valves into the holes metal end first so that the plastic end of the valve
faces up.
c. Make sure that the top surface of the valves is flush with the surface of the valve housing.
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