Service And Adjustments - Craftsman 919.167312 Owner's Manual

Risk of Unsafe Operation. Unit cycles automatically when
power is on. When servicing, you may be exposed to
voffage sources, compressed air, or moving parts. Before servicing unit
unplug or disconnect electrica_ supply to the air compresso5 bmeed tank
of pressure, and allow the air compressor to cool.
PROBLEM CAUSE CORRECTION
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.
(if equipped)
Air leaks in air
tank or at air
tank welds.
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 sea!. Air leaks
between head
and valve plate,
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
O\_RTIGHTEN.
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.
Risk of
Bursting
Do not drill into, wemd or
otherwise modify air tank
or it will weaken. The tank
can rupture or expmode.
Contact a Trained Service
Technician.
21-ENG A09707