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
4. Install the new discharge cartridge valve, o-ring, and flat washer as follows (see Figure 13):
a. Insert the new O-ring all the way down into the opening at the top of the pump head.
b. Set the discharge cartridge valve into the opening at the top of the pump head with the
flat end of the cartridge up.
c. Insert the new flat washer into the bottom of the four-function valve.
d. Apply anti-seize tape to the bottom threads only of the four-function valve.
e. Screw the four-function valve into the opening at the top of the pump head until the valve
contacts the O-ring.
f. Add an additional 1/8 1/4 turn to prevent leaks.
g. Connect the return tubing to the threaded port at the side of the four-function valve.
NOTE
To ensure priming, the return tubing must not be submerged in the solution.
h. Connect the discharge tubing to the top of the four-function valve assembly. Thread the
coupling nut onto the four-function valve 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 chemical injection pump as described in the Chemical Injection Pump Replacement
procedure earlier in this WP.
8.
Operate the pump and check for leaks.
Chemical Injection Pump Repair / Suction Valve Assembly:
Parts (TM 10-4610-309-24P):
Suction valve assembly
Material:
Five gallon bucket
Equipment Condition:
TWPS Electrical Power "ON"
Replace the chemical injection pump suction valve assembly as follows:
1. Depressurize the chemical injection pump discharge tubing as described in the Chemical
Injection Pump Replacement procedure earlier in this WP.
2. Remove the foot valve from the chemical solution bucket and place it in the empty five-gallon
bucket to drain the suction line.
3. Remove the chemical injection pump suction valve assembly as follows (see Figure 14):
a. Unscrew the coupling nut from suction valve housing and pull the suction tube off the
valve housing.
b. Remove and discard the clamp ring and coupling nut from the suction tubing.
c. Unscrew the suction valve housing from the bottom of the pump head.
d. Remove and discard the suction cartridge valve, o-ring, and flat washer from inside the
bottom of the pump head.
0057 00-16
