ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0055 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
AIR SYSTEM, REDUCED PRESSURE
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 Solenoid Valve XV-902 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 4 assembly from the TWPS. Refer to REPLACE and Air
System Section 4 Assembly.
3. Remove Solenoid Valve XV-902 from the Air System Section 4 assembly as follows (see Figure
8):
a. Disconnect Solenoid Valve XV-902, the close nipple and reducer bushing from Check
Valve V-908.
b. Disconnect the reducer bushing, the two close nipples, and the elbow from Solenoid
Valve XV-902.
3/8" CLOSE NIPPLE
1/2" TO 3/8" REDUCER BUSHING
CHECK VALVE V-908
3/8" 90-DEGREE
ELBOW
3/8" CLOSE NIPPLE
SOLENOID VALVE XV-902
Figure 8. Solenoid Valve XV-902.
2. Place the old solenoid valve on a clean workbench and perform the following
a. Clean all disassembled parts.
b. Apply antiseizing tape to both ends of the two close nipples and to the external threads of
the reducer bushing.
055 00-13
