Troubleshooting - Craftsman 919.728001 Owner's Manual

may be exposed to voltage sources, compressed air, or moving parts.
Personal injuries can occur. Before performing any maintenance or
repair, disconnect power source from the compressor and bleed off all air
pressure.
PROBLEM
Excessive
tank pressure
- safety valve
pops off.
Air leaks at
fittings.
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

Risk of Unsafe Operation. Unit cycles automatically
when power is on. When performing maintenance, you
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
solution. DO NOT OVER
TIGHTEN.
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 Adjustments
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.
25 - ENG
CORRECTION
Risk of
Bursting.
A15256