TROUBLESHOOTING

Performing repairs may expose voltage sources, moving parts or compressed air sources, moving parts or

compressed air sources. Personal injury may occur. Prior to attempting any repairs, unplug the air compressor and bleed off all air tank air pressure.

PROBLEM

CAUSE

CORRECTION

Excessive tank

Pressure switch does not

Move On/Auto/Off lever to

pressure - safety

shut off motor when

the “OFF” position, if the

valve pops off.

compressor reaches “cut-

outfit does not shut off

 

out” pressure.

contact a Trained Service

 

 

Technician.

 

Pressure switch “cut-out”

Contact a Trained Service

 

too high.

Technician.

 

 

 

 

 

 

 

Air leaks at

Tube fittings are not tight

Tighten fittings where air can

fittings.

enough.

be heard escaping. Check

 

 

fittings with soapy water

 

 

solution. Do Not

 

 

Overtighten.

Air leaks at or

Check valve seat damaged.

A defective check valve

inside check

 

results in a constant air leak

valve

 

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.

 

 

 

 

 

 

 

Air leaks at

Defective pressure switch

Contact a Trained Service

pressure switch

release valve.

Technician.

release valve.

 

 

 

 

 

 

 

 

 

 

 

 

 

Air leaks in air

Defective air tank.

Air tank must be replaced.

tank or at air

 

Do not repair the leak.

tank welds.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Do not drill into, weld or

 

 

otherwise modify air tank

 

 

or it will weaken. The tank

 

 

can rupture or explode.

Air leaks

Leaking seal.

Contact a Trained Service

between head

 

Technician.

and valve plate.

 

 

 

 

 

 

 

 

 

 

 

 

 

21- ENG

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Craftsman 919.7255 manual Troubleshooting, Problem Cause Correction