ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
OPERATOR MAINTENANCE PROCEDURES
AIR SYSTEM
12. If the filter assembly leaks after a new cartridge has been installed, perform the following:
a. Remove the purifier cartridge following step 3.
b. Inspect the O-rings, replace if necessary.
c. Ensure protective caps and devices have been removed from the nipple of the cartridge.
d. Inspect the inside of the filter housing and make sure that no foreign objects are inside
the chamber, especially in the filter base where the nipple fits.
13. Replace the cartridge following steps 4 - 7.
SERVICE
Pressure Switch Assembly PSL/PSH-901 Adjustment:
Equipment Condition:
TWPS in Standby Shutdown without Drain-Down
Adjust the Pressure Switch PSL/PSH-901 high-pressure shut-off setting as follows (see Figure 5):
1. Make sure TWPS is in Standby Shutdown without Draining Down (WP 0017).
WARNING
High pressure. The air system contains air pressure up to 1800 psig. The air
system must be bled prior to adjusting the pressure switch. Failure to observe this
warning can result in injury to personnel and damage to equipment.
2. Close Air Receiver Tank Shut-Off Valve V-907.
3. Switch the Air Compressor control at the OCP to OFF.
4. Slowly open High Pressure Air Vent Valve V-904 to bleed the air from the high-pressure system.
Then close the valve.
5. Remove the screws and cover plate from the back of Pressure Switch Assembly PSL/PSH-901.
6. Keep the pressure-adjusting nut in place and loosen the lock nut.
NOTE
A small turn of the pressure-adjusting nut will result in a large change in the high-
pressure shut-off setting. Make adjustments in increments of about 1/8 to 1/4 turn.
Turning the adjusting nut into the spring (clockwise) increases the high-pressure
shut-off setting. Turning the nut away from the spring (counter-clockwise) reduces
the high-pressure shut-off setting.
The low-pressure compressor turn-on setting is a fixed span from the high-
pressure setting and cannot be adjusted independently. Adjusting the high-
pressure setting changes the low-pressure setting by the same amount.
7. Turn the pressure adjusting nut 1/8 to 1/4 turn in the desired direction.
8. Open Air Receiver Tank Shut-Off Valve V-907.
9. Switch the Air Compressor control to AUTO.
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