Craftsman 919.167551 - Manual (Page 18)

18- ENG
TROUBLESHOOTING
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
tank pressure
- safety valve
pops off.
Pressure switch does not
shut off motor when
compressor reaches
"cut-out" pressure.
Move Auto/Off lever to the
"Off" position, if the outfit
does not shut off contact a
Trained Service Technician.
Pressure switch "cut-out"
too high.
Contact a Trained Service
Technician.
Air leaks at fit-
tings.
Tube fittings are not tight
enough.
Tighten fittings where air can
be heard escaping. Check
fittings with soapy water solu-
tion. Do Not Overtighten.
Air leaks at or
inside check
valve.
Check valve seat damaged. Replace check valve. Refer to
the To Replace Check Valve
in the Service and Adjustment
section.
Air leaks in air
tank or at air
tank welds.
Defective air tank. 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.
Air leaks
between head
and valve plate.
Leaking seal. Contact a Trained Service
Technician.