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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
Excessive tank
pressure -
safety valve
pops off.
Air leaks at
fittings.
CAUSE
CORRECTION
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 if valve seat
damaged.
Air leaks at or
inside check
valve
Move On/Auto/Off
lever to
the "OFF" position,
if the air
compressor does
not shut off contact a Sears
or other Trained Service
Technician.
Contact a Sears or other
Trained Service Technician.
Tighten fittings where air can
be heard escaping. Check
fittings with soapy water
solution. Bubbles will
indicate a leak. 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 "To Replace
or Clean Check Valve" in the
"Service and Adjustments"
section.
Air leaks at
Defective pressure switch
Contact a Sears or other
pressure switch
release valve.
Trained Service Technician.
release valve.
(if equipped)
Air leaks in air
Defective air tank.
tank or at air
tank welds.
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 air
tank can rupture or
explode and cause
_ossible
serious injury.
Air leaks
Leaking seal.
Contact a Sears or other
between head
Trained Service Technician.
and valve plate.
23_ ENG
D30091
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