TM 5-4310-384-13
INSPECTION.
NOTE
Air tank should be under pressure to check action of safety valve.
a.
Run compressor until unit kicks off (tank pressure close to 190 psi).
b.
Turn compressor switch OFF.
c.
Pull ring (1) on safety valve (2)and release. Air should escape when ring is pulled; valve should reseat itself and
stop air release after several seconds.
d.
Replace valve (2) if air continues to escape or if plunger action is sticky. Refer to next paragraph.
e.
Apply soap solution to valve and check for leaks. If bubbles appear tighten valve. If leak continues, replace
valve.
REMOVAL.
WARNING
Disconnect main power and turn compressor unit off before performing maintenance procedures.
a.
Disconnect main power and turn compressor switch OFF.
WARNING
Air pressure in tank must be discharged before removal of safety valve. Removal under pressure could
cause serious injury.
b.
Open drain cock (3) and completely release tank pressure. Close drain cock.
c.
Unscrew safety valve (2).
NOTE
Safety valve is not repairable. Replace if defective.
INSTALLATION.
a.
Coat threads with anti-seize tape, install safety valve (2) on tank and tighten. Be careful not to strip threads
when installing.
b.
Check that drain cock (3) is closed.
c.
Connect main power and turn compressor on.
d.
Run compressor and check for leaks.
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