ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
0034 00
TROUBLESHOOTING PROCEDURES
UNIT TROUBLESHOOTING PROCEDURES TACTICAL WATER
PURIFICATION SYSTEM (TWPS)
THIS SECTION COVERS:
Chemical Injection System
INITIAL SETUP:
TWPS Set Up
Maintenance Level
Unit
CHEMICAL SYSTEM MALFUNCTIONS
Table 11. Chemical System Troubleshooting.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
1
Chemical pump runs but will
Output dials not set properly.
Always prime pump with speed at 80% and
not prime.
stroke at 80%.
Four-function valve not set properly.
Black priming knob must be turned 1/4
turn to pull it outward.
Foot valve not in semi-vertical position on
Foot valve must be in vertical or semi-
the bottom of the chemical tank.
vertical position.
Clogged foot valve screen.
Remove and clean foot valve screen (WP
Suction or discharge fittings are over-
Loosen fittings slightly. If still not working,
tightened into pump head.
replace suction or discharge valve
assemblies (WP 0057).
Suction cartridge valve leaking.
Replace suction valve assembly (WP
Pump diaphragm ruptured.
Replace pump diaphragm (WP 0057).
2
Chemical pump loses prime.
Chemical bucket level has dropped below
Refill container with solution and re-prime
the suction screen.
Foot valve not in semi-vertical position on
Foot valve must be in vertical or semi-
the bottom of the chemical tank.
vertical position.
Clogged foot valve screen.
Remove and clean foot valve screen (WP
Suction or discharge fittings are over-
Loosen fittings slightly. If still not working,
tightened into pump head.
replace O-rings.
Suction cartridge valve leaking.
Replace suction valve assembly (WP
Pump diaphragm ruptured.
Replace pump diaphragm (WP 0057).
3
Leakage at chemical pump
Worn tubing ends.
Cut about one inch off tubing and
suction, discharge, or return
reconnect.
tubing.
Loose or cracked coupling nut.
Replace suction, discharge, or four-function
valve assembly (WP 0057).
Worn valve O-rings.
Replace suction, discharge, or four-function
valve assembly (WP 0057).
0034 00-36
