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19 - ENG D23269
TROUBLESHOOTING
Performing repairs may expose voltage sources, moving parts
or compressed air sources, moving parts or compressed air
sources. Personal injury may occur. Prior to attempting any repairs, unplug the air
compressor and bleed off all air tank air pressure.
PROBLEM
CAUSE
CORRECTION
Pressure switch does
not shut off motor when
compressor reaches
“cut-out” pressure.
Pressure switch “cut-
out” too high.
Move On/Auto/Off lever to the
“OFF” position, if the outfit does
not shut off contact a Trained
Service Technician.
Contact a Trained Service
Technician.
Excessive tank pres-
sure - safety valve
pops off.
Tube fittings are not tight
enough.
Tighten fittings where air can be
heard escaping. Check fittings
with soapy water solution. DO
NOT OVERTIGHTEN.
Air leaks at fittings.
Air leaks at pressure
switch release valve.
Defective pressure
switch release valve.
Contact a Trained Service
Technician.
Air leaks in air tank
or at air tank welds.
Defective air tank.
Air tank must be replaced. Do
not repair the leak.
Do not drill into, weld or other-
wise modify air tank or it will
weaken. The tank can rupture or
explode.
Air leaks between
head and valve
plate.
Leaking seal.
Contact a Trained Service
Technician.
Air leaks at or inside
check valve
Check valve seat dam-
aged.
A defective check valve results in
a constant air leak at the pressure
release valve when there is pres-
sure in the tank and the compres-
sor is shut off. Replace check
valve. Refer the “To Replace or
Clean Check Valve” in the
“Operation” section.