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)
Table 9. General Air System Troubleshooting - Continued.
ITEM
MALFUNCTION
POSSIBLE CAUSES
CORRECTIVE ACTION
1
System pressure gauge PI-
Leaking air tubing or connections.
Check tubing for leaks at connections.
cont
901 reading less than 975
Push in to re-establish connection. If
psig and compressor
unable to repair leak, bleed the air system
continues to run without
increasing the pressure to the
shut-off pressure or
compressor fails to reach
Leaking air piping or hoses.
Bleed the air system (WP 0042) then
shut-off pressure between
remove the leaking fitting, replace the
backwashes (continued).
thread tape and re-install. Replace leaking
Leaking tubing or connections inside the
Open the instrument panel outer and inner
Instrument/Solenoid Panel Box.
doors. Check for leaks. Repair as needed.
Leaking solenoid valve XV-901, XV-902 or
Stop the air compressor. Feel each of the
XV-903.
three solenoid valves. If vibrating, it may be
leaking. Replace the valve (WP 0055).
Air compressor safety valve on the second
Feel for air flow from the safety valve on top
stage head is relieving.
of the second stage head with the
compressor on. If flow is noted, replace all
three compressor valve assemblies
Leaking air compressor valves.
Replace valve assemblies (WP 0056).
2
Air system pressure
Defective pressure gauge PI-902.
Bleed system air pressure (V-910) with V-
regulation pressure gauge PI-
907 closed. If the gauge reading does not
902 is reading less than 90
move, or does not return to zero, replace
psig. Pressure gauge PI-901
the gauge (WP 0054).
readings are normal.
Pressure regulating valve PRV-901 (in Air
Adjust the pressure regulating valve to
System Section 1) out of adjustment or
provide a 100 psig reading at PI-902 (WP
malfunctioning.
valve, replace the valve (WP 0055).
3
Pressure gauge PI-903
Defective pressure gauge PI-903.
Bleed system air pressure (V-915). If the
pressure reading is not 15
gauge reading does not move, or does not
psig.
return to zero, replace the gauge (WP
Pressure regulating valve PRV-902 out of
Open V-915 slightly to bleed low pressure
adjustment.
air. While bleeding low pressure air, adjust
pressure-regulating valve PRV-902 to
provide a 15 psig reading at PI-903 (WP
valve, replace the PRV-902 (WP 0055).
4
Compressor stops below 950
Defective pressure gauge PI-901.
Bleed system air pressure (V-910) with V-
psig. Compressor switch
907 closed. If the gauge reading does not
light is OFF.
move, or does not return to zero, replace
the gauge (WP 0055).
Pressure Switch PSL/PSH-901 high
Adjust Pressure Switch PSL/PSH-901 high-
pressure shut-off setting out of
pressure shut-off setting (WP 0042).
adjustment.
0034 00-31
