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 Gauge PI-901 Replacement:
Parts (TM 10-4610-309-24P):
Pressure Gauge PI-901
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-901 as follows:
NOTE
Pressure Gauge PI-901 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 Gauge PI-901 from its reducing bushing in the Air System Section 1 assembly
(see Figure 9).
PRESSURE GAUGE PI-901
AIR SYSTEM
SECTION 1 ASSEMBLY
REDUCING BUSHING
Figure 9. Pressure Gauge PI-901.
3. Clean and apply antiseizing tape to the threads of new Pressure Gauge PI-901.
4. Thread new Pressure Gauge PI-901 into its reducing bushing in the Air System Section 1
Assembly and tighten in the position shown in Figure 9.
5. Check new Pressure Gauge PI-901 for leaks.
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