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air sources. Personal injury may occur. Before servicing: 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.
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 Unsafer Operation. Performing repairs may
expose voltage sources, moving parts, or compressed
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
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 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.
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
CORRECTION
Risk of
Bursting.
A17883
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