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
Pressure Maintaining Valve V-905 Replacement:
Parts (TM 10-4610-309-24P):
Pressure Maintaining Valve V-905
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 Maintaining Valve V-905 as follows:
NOTE
Pressure-maintaining valve V-905 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.
2. Remove Pressure Maintaining Valve V-905 from the Air System Section 1 assembly as follows
(see Figure 7):
a. Tag and disconnect the air supply hose from Pressure Maintaining Valve V-905.
b. Disconnect the pressure-maintaining valve from the assembly at the pipe union.
AIR SYSTEM SECTION 1 ASSEMBLY
CLOSE NIPPLE
PIPE UNION HALF
ADJUSTMENT
SCREW END PLUG
PRESSURE MAINTAINING VALVE V-905
Figure 7. Pressure Maintaining Valve V-905.
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