ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
OPERATOR MAINTENANCE PROCEDURES
AIR SYSTEM
10. Observe the effect of your adjustment as follows:
a. If increasing the high-pressure shut-off setting, observe Pressure Gauge PI-901 while the
compressor operates. Note the pressure at which the compressor shuts off.
b. If reducing the high-pressure shut-off setting, slowly open Low Pressure Air Vent Valve
V-910 to bleed the air from the air system until the compressor comes on. Observe
Pressure Gauge PI-901 while the compressor operates. Note the pressure at which the
compressor shuts off.
11. Repeat steps 2 through 10 until the compressor shuts off within a range of 925 to 975 psig.
12. Hold the pressure-adjusting nut in place and tighten the lock nut.
13. Reinstall the cover plate on the back of Pressure Switch Assembly PSL/PSH-901 using the
screws removed earlier.
PRESSURE SWITCH ASSEMBLY
PRESSURE GAUGE PI-901
PSL/PSH-901
LOW PRESSURE AIR
LOCK NUT
VENT VALVE V-910
AIR RECEIVER TANK
SHUT-OFF VALVE V-910
PRESSURE ADJUSTING NUT
INCREASE HIGH-PRESSURE SHUT-OFF SETTING
REDUCE HIGH-PRESSURE SHUT-OFF SETTING
HIGH PRESSURE AIR VENT VALVE V-904
Figure 5. Pressure Switch PSL/PSH-901 Adjustment.
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