TM 5-4310-384-13
INSPECTION.
CAUTION
Use soap solution to check for air leaks at tank fittings only.
a.
With air pressure present in tank, inspect the pressure switch for air leaks using a soap and water solution.
b.
Check for air discharge from unloader valve (1) upon compressor shutdown.
c.
Disconnect main power and turn ON/OFF switch to OFF.
d.
Inspect the switch contacts for burning or pitting. Replace the pressure switch if contacts are bad.
REMOVAL.
WARNING
Be sure main power is disconnected before doing any work on electrical systems. Voltages present in this
equipment can cause injury or death.
a.
Disconnect the main power and turn the ON/OFF switch OFF.
WARNING
Air in tank must be discharged before removal of pressure switch to prevent serious injury.
b.
Open the drain cock on bottom of tank to discharge all air pressure. Close drain cock.
c.
Loosen screw (2) and remove cover (3).
d.
Tag and label motor and power wires (4).
e.
Loosen terminal screws (5) and disconnect wires from switch terminals.
f.
Remove conduit locknuts (6) and remove conduit (7).
g.
Remove unloader line (8) at valve.
h.
Unscrew pressure switch by hand from tank.
CLEANING.
WARNING
Clean pressure switch with compressed air no greater than 30 psi. Eye protective equipment must be
worn when cleaning with compressed air. Remove loose dirt from inside of pressure switch with soft brush
and compressed air.
INSTALLATION.
WARNING
Be sure main power is disconnected before doing any work on electrical systems. Voltages present in this
equipment can cause injury or death.
a.
Install the pressure switch onto tank.
b.
Install the unloader line (8) at the fitting.
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