ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
CHEMICAL INJECTION SYSTEM
l.
Position the pump and secure it to the mounting plate using the 4 screws, washers and
nuts removed earlier.
m. Reconnect the discharge, return, and suction tubes to the pump.
3. Startup the TWPS from Standby Shutdown and prime the chemical injection pump as described
in the Chemical Injection Pump Replacement procedure earlier in this WP.
4. Operate the chemical injection pump and check for leaks.
5. After one week of operation, recheck the pump head screws and tighten if necessary.
Chemical Injection Pump Repair / Discharge Cartridge Valve, O-Ring, and Flat Washer:
Parts (TM 10-4610-309-24P):
Discharge cartridge (valve) assembly
O-ring
Flat washer
Material:
Antiseizing tape (WP 0079, Table 1, item 30, 31)
Five gallon bucket
Equipment Condition:
TWPS Electrical Power "ON"
Replace the chemical injection pump discharge cartridge valve, o-ring, and flat washer 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 discharge valve assembly as follows (see Figure 13):
a. Remove the return tubing from side of the four-function valve.
b. Remove the discharge tubing from the top of the four-function valve.
c. Remove the four-function valve from the top of the pump head.
d. Remove and discard the discharge cartridge valve, O-ring, and flat washer from inside
the top of the pump head.
DISCHARGE TUBING
FOUR-FUNCTION VALVE
PUMP HEAD
RETURN TUBING
FLAT WASHER
DISCHARGE CARTRIDGE VALVE
O-RING
Figure 13. Chemical Injection Pump Discharge Cartridge, O-Ring, and Flat Washer Replacement.
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