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 new pressure switch assembly as follows (see Figure 5):
a. Clean the threads of the elbow ferrule and wrap antiseize tape around the threads.
b. Screw the ferrule into the pressure switch assembly box.
c. Secure the pressure switch assembly to the TWPS using the three bolts, six washers,
and three nuts.
d. Secure the air hose to the elbow ferrule on the pressure switch assembly box. Refer to
e. Remove the new pressure switch assembly terminal box cover. Feed the control wires
into the box. Secure the red wire with the upper terminal screw. Secure the black wire
with the lower terminal screw.
f. Screw the ring nut onto the terminal box connection
g. Secure the pressure switch assembly terminal box cover to the box.
Air System Section 1 Assembly Replacement:
Parts (TM 10-4610-309-24P):
Air System Section 1 Assembly
Materials:
Tape, antiseizing (WP 0079, Table 1, item 43, 44)
Personnel Required:
Two
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 the Air System Section 1 assembly 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 as follows (see Figure 6):
a. Tag and disconnect the air supply hose from Pressure Maintaining Valve V-905.
b. Tag and disconnect the hose from the Section 1 outlet that goes to the PSL/PSH-901
pressure switch.
c. Tag and disconnect the hose from the Section 1 outlet that goes to Air Tank R-1.
d. Tag and disconnect the hose from the Section 1 outlet that goes to Air System Section 3.
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