ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
0056 00
TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
AIR COMPRESSOR
4. Install the new second stage valve head assembly as follows (see Figure 9):
CAUTION
To avoid damage to the valve body, loosen the pressure valve set screw before
installing the valve head.
a.
Remove the dome nut and dome nut gasket from the top of the valve head.
b.
Loosen the second stage pressure valve set screw.
c.
Apply a thin layer of silicone adhesive to the sealing surface of the valve head.
d.
Install the valve head assembly on the piston cylinder.
e.
Apply corrosion preventive compound to the six socket head cap screws and secure the
valve head and piston cylinder in place. Torque the cap screws to 206 in.-lbs in the
sequence shown in Figure 10.
1
3
6
4
5
2
Figure 10. Second Stage Valve Head Cap Screw Torque Sequence.
f. Tighten the pressure valve set screw.
g. Install the dome nut gasket and dome nut.
h. Connect the two intercooler tubes to the new second stage valve head.
5. Turn the compressor manually using the flywheel to make sure that all components have been
correctly installed.
CAUTION
After replacing a valve head assembly on the compressor, the compressor should
be stopped after 30 minutes of operation and the socket head screws and cap nut
at the top of the valve head should be tightened. Failure to observe this CAUTION
may result in the valve head gasket(s) leaking.
6. Thirty minutes after restarting the compressor, stop the compressor and let it cool to ambient
temperature. Retighten the socket head screws and the cap nut at the top of the valve head.
0056 00-16
