ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
AIR SYSTEM, HIGH PRESSURE
3. Install the pressure regulating valve onto the Air System Section 1 assembly as follows:
a. Thread the Pressure Regulating Valve and close nipple to the cross pipe that contains
Pressure Gauge PI-901 (see Figure 17 for the correct positioning of the valve).
b. Thread the cross pipe that contains Pressure Gauge PI-902 into the other close nipple on
the pressure-regulating valve (see Figure 17 for the correct positioning of the cross tee
with Pressure Gauge PI-902).
4. Install the Air System Section 1 assembly onto the TWPS. Refer to REPLACE and Air System
Section 1 Assembly.
5. Check the new Pressure Regulating Valve PRV-901 and associated piping for leaks.
Pressure Gauge PI-902 Replacement:
Parts (TM 10-4610-309-24P):
Pressure Gauge PI-902
Material:
Tape, antiseizing (WP 0079, Table 1, item 43, 44)
Equipment Condition:
TWPS in Standby Shutdown Without Draining Down
Army: Generator off and TWPS main breaker off
Marine Corps: TWPS disconnected from power source
Entire air system bled down
WARNING
The TWPS must be in Shutdown and the TQG and TWPS main breaker must be off
(Army) or the TWPS disconnected from its power source (Marine Corps) prior to
performing maintenance on the TWPS Air System. Failure to observe this warning
can result in injury to personnel and damage to equipment.
High pressure. The air system contains air pressure up to 1800 psig. The air
system must be bled prior to performing maintenance on components of the air
system. Failure to observe this warning can result in injury to personnel and
damage to equipment.
Replace Pressure Gauge PI-902 as follows:
NOTE
Pressure Gauge PI-902 can be replaced without removing the Air System Section 1
assembly from the TWPS.
1. Make sure the air system has been bled down. Refer to ENTIRE AIR SYSTEM BLEED DOWN.
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