Westward Operating Instructions and Parts Manual

Model 3JR70A

 

 

Portable Air Compressor

Voltage sources, moving parts, or compressed air sources are exposed when repairing the compressor.

Personal injury can occur. Unplug the compressor before attempting any repairs.

Troubleshooting Chart

Symptom (s)

Possible Causes (s)

Corrective Actions (s)

Excessive tank

1.

Pressure switch does

1.

Move On/Auto/Off lever

pressure - safety

 

not shut off motor when

 

to the "OFF" position. If

valve pops off.

 

compressor reaches

 

the outfit does not shut

 

 

"cut-out" pressure.

 

off contact a trained

 

 

 

 

service technician.

 

2.

Pressure switch "cut-

2.

Contact a trained service

 

 

out" too high.

 

technician.

 

 

 

 

 

Air leaks at

1.

Tube fittings are not

1.

Tighten fittings where air

fittings.

 

tight enough.

 

can be heard escaping.

Check fittings with soapy water solution. Do Not

Overtighten.

Air leaks in air

1. Defective air tank.

tank or at air

 

tank welds.

 

Air leaks

1.

Leaking seal.

between head

 

 

and valve plate.

 

 

Air leak from

1.

Possible defect in

safety valve.

 

safety valve.

1.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.

1.Contact a trained service technician.

1.Operate safety valve manually by pulling on ring. If valve still leaks, it should be replaced.

Knocking Noise. 1. Possible defect in safety valve.

1.Operate safety valve manually by pulling on ring. If valve still leaks, it should be replaced.

16- ENG

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DeWalt 3JR70A specifications Troubleshooting Chart, Symptom s Possible Causes s Corrective Actions s