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Westward Operating Instructions and Parts Manual
Personal injury can occur. Unplug the compressor before attempting any
repairs.
Troubleshooting Chart
Symptom (s)
Excessive tank
pressure - safety
valve pops off.
Air leaks at
fittings.
Air leaks in air
tank or at air
tank welds.
Air leaks
between head
and valve plate.
Air leak from
safety valve.
Knocking Noise.
Portable Air Compressor
Voltage sources, moving parts, or compressed air
sources are exposed when repairing the compressor.
Possible Causes (s)
1.
Pressure switch does
not shut off motor when
compressor reaches
"cut-out" pressure.
2.
Pressure switch "cut-
out" too high.
1.
Tube fittings are not
tight enough.
1.
Defective air tank.
1.
Leaking seal.
1.
Possible defect in
safety valve.
1.
Possible defect in safety
valve.
Corrective Actions (s)
1.
2.
1.
1.
weld or otherwise modify
air tank or it will weaken.
The tank can rupture or
explode.
1.
1.
1.
16- ENG
Model 3JR70A
Move On/Auto/Off lever
to the "OFF" position. If
the outfit 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.
Air tank must be
replaced. Do not repair
the leak.
Do not
drill into,
Contact a trained service
technician.
Operate safety valve
manually by pulling on
ring. If valve still leaks, it
should be replaced.
Operate safety valve
manually by pulling on
ring. If valve still leaks, it
should be replaced.
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