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. Place the old pressure maintaining valve on a clean workbench and perform the following steps:
a. Remove the close nipple and the half of the pipe union on the nipple from the valve.
Separate the union half from the nipple.
b. Clean both ends of the close nipple. Apply antiseizing tape to the threads at both ends.
c. Thread the pipe union half onto the close nipple.
d. Thread the close nipple with the union half into the output of the new pressure
maintaining valve. Do not over-tighten.
e. Clean the threaded end of the pipe union half that was left on the Section 1 assembly.
Apply antiseizing tape to the threads.
4. Install the new pressure-maintaining valve on the Air System Section 1 assembly.
5. Make sure the position of Pressure Maintaining Valve V-905 matches Figure 6 (Air System
Section 1 Assembly).
6. Check the new pressure-maintaining valve for leaks.
Low Pressure Air Check Valve V-906 Replacement:
Parts (TM 10-4610-309-24P):
Low-Pressure Air Check Valve V-906
Material:
Tape, antiseizing (WP 0079, Table 1, item 43, 44)
Clean, lint-free rags (WP 0079, Table 1, item 33)
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 Low-Pressure Air Check Valve V-906 as follows:
1. Make sure the air system has been bled down. Refer to ENTIRE AIR SYSTEM BLEED DOWN.
2. Remove the Air System Section 1 assembly. Refer to REPLACE and Air System Section 1
Assembly.
3. Remove Low-Pressure Check Valve V-906 from the Air System Section 1 assembly as follows
(see Figure 8):
a. Disconnect Pressure-Maintaining Valve V-905 from the assembly at the pipe union.
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