Troubleshooting - Craftsman 919.724320 Owner's Manual

pressed air sources. Personal injury may occur. Prior to attempting any
repairs, unplug the air compressor and bleed off all air tank air pressure.
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
between head
and valve plate.

TROUBLESHOOTING

Performing repairs may expose voltage sources, moving
parts or compressed air sources, moving parts or com-
CAUSE
Pressure switch does not
shut off motor when com-
pressor 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
outfit does not shut off con-
tact a Trained Service
Technician.
Contact a Trained Service
Technician.
Tighten fittings where air can
be heard escaping. Check
fittings with soapy water
solution. 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 the "To Replace
or Clean Check Valve" in the
"Service and Adjustment"
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.
21- ENG
CORRECTION
D24544