Troubleshooting - Craftsman 919.167281 Owner's Manual

Personal injury may occur. Before servicing: Unplug or disconnect electrical
supply to the air compressor, bleed tank of pressure, and allow the air
compressor to cool.
PROBLEM
Excessive tank
pressure - safety
valve pops off.
Air leaks at fit-
tings.
Air leaks at or
inside check
valve.
Air leaks at
pressure switch
release valve.
Air leaks in air
tank or at air
tank welds.
Air leaks be-
tween head and
valve plate.
A17893

TROUBLESHOOTING

Risk of Unsafer Operation. Performing repairs may expose
voltage sources, moving parts, or compressed air sources.
CAUSE
Pressure switch does not
shut off motor when
compressor reaches
"cut-out" pressure.
Pressure switch "cut-out"
too high.
Tube fittings are not tight
enough.
Check valve seat damaged.
Defective pressure switch
release valve.
Defective air tank.
Leaking seal.
Move On/Auto/Off lever to
the "OFF" position, if the unit
does not shut off contact a
Trained Service Technician.
Contact a Trained Service
Technician.
Tighten fittings where air can
be heard escaping. Check
fittings with soapy water so-
lution. Do Not Overtighten.
A defective check valve
results in a constant air leak
at the pressure release valve
when there is pressure in the
tank and the compressor
is shut off. Replace check
valve. Refer to the "To Re-
place or Clean Check Valve"
in the Service and Adjust-
ment section.
Contact a Trained Service
Technician.
Air tank must be replaced.
Do not repair the leak.
Do not drill into, weld or
otherwise modify air tank or
it will weaken. The tank can
rupture or explode.
Contact a Trained Service
Technician.
20- ENG
CORRECTION
Risk of
Bursting.