Troubleshooting - Craftsman 919.167620 Owner's Manual

_Risk of Unsafe Operation. Unit cycles automatically when
power is on. When servicing, you may be exposed to
voltage sources, compressed air, or moving parts. Before servicing unit
unplug or disconnect electrical supply to the air compressor, bleed tank of
pressure, and allow the air compressor to cool
PROBLEM CAUSE CORRECTION
Excessive Pressure switch does not Move Auto/Off lever to the
tank pressure shut off motor when "Off" position, if the outfit
- safety valve compressor reaches does not shut off contact a
pops off. "cut-out" pressure. Trained Service Technician.
Pressure switch "cut-out" Contact a Trained Service
too high. Technician.
Air leaks at fit- Tube fittings are not tight
tings, enough.
Check valve seat damaged.
Air leaks at or
inside check
valve.
Air leaks at
pressure switch
release valve.
Air leaks in air
tank or at air
tank welds.
Defective pressure switch
release valve.
Defective air tank.
Air leaks Leaking seal.
between head
and valve plate.
Tighten fittings where air can
be heard escaping. Check fit-
tings with soapy water solu-
tion, 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 Replace
Check Valve" in the Service
and Adjustment section.
Contact a Trained Service
Technician.
Air tank must be replaced. Do
not repair the leak.
Risk of
-- Bursting
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.
19-ENG 1000002923