ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0057 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
CHEMICAL INJECTION SYSTEM
PUMP HEAD
O-RING
SUCTION CARTRIDGE VALVE
FLAT WASHER
SUCTION VALVE HOUSING
CLAMP RING
COUPLING NUT
SUCTION TUBE
Figure 14. Chemical Injection Pump Suction Valve Assembly Replacement.
4. Install the new suction valve assembly as follows (see Figure 14):
a. Insert the new O-ring all the way into the opening at the bottom of the pump head.
b. Insert the new flat washer into the suction valve housing.
c. Set the suction cartridge valve into the suction valve housing with the flat end of the
cartridge in.
d. Thread the suction valve housing into the opening at the bottom of the pump head until it
contacts the O-ring.
e. Add an additional 1/8 1/4 turn to prevent leaks.
f. Slide the new coupling nut over the suction tubing so that the nut threads are facing
toward the end of the tubing.
g. Install the clamp ring about 1/4inch onto the end of the tubing.
h. Connect the suction tubing to the suction valve housing.
i. Thread the coupling nut onto the valve housing and tighten hand-tight.
5. Place the foot valve back into the chemical solution bucket.
6. Make sure that the suction tubing is completely vertical and two inches from the bottom of
chemical solution bucket.
7. Prime the pump as described in the Chemical Injection Pump Replacement procedure earlier
in this WP.
8. Operate the pump and check for leaks.
END OF WORK PACKAGE
0057 00-17/18 BLANK
