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WARNING
PERFORMING REPAIRS MAY EXPOSE VOLTAGE SOURCES, MOVING PARTS
OR COMPRESSEDAIR SOURCES. PERSONAL INJURY MAY OCCUR. PRIOR
TO AI-rEMPTING ANY REPAIRS, UNPLUG THE COMPRESSOR AND BLEED
OFF ALL TANK AIR PRESSURE.
PROBLEM
Excessivetank pressure- safety
valve pops off.
Air leaks at fittings.
Airleaksator insidecheckvalve.
pressure switch
Air leaks at
release valve.
CAUSE CORRECTION
Air leaksin airtank oratairtank
welds.
Air leakfrom safety valve
Knocking noise
Pressureswitchdoesnotshut offmotor
when compressorreaches "cut-out"
pressure.
Pressure switch "cut-out" too high.
Tube fittings are not tight enough.
Defectiveor dirty check valve.
Defectivepressureswitchreleasevalve.
Defectivecheck valve.
Defective air tank.
Possible defect in safety valve
Restricted of defective check valve.
20
Movethepressure switchlevertothe"OFF" position.
If the outfit doesn't shut off, and the electrical con-
tacts are welded together, replace the pressure
switch.
Ifthe contactsaregood,checktosee ifthepininthe
bottomofthe pressurerelease valve isstuck. If it
doesnot movefreely, replacethevalve.
Retum the outfitto Sears Service Center to check
and adjust, orreplaceswitch.
Tighten fittings where air can be heard escaping.
Check fittings with soapy water solution. DO NOT
OVER-TIGHTEN.
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. Remove
and clean or replace check valve. DO NOT OVER-
TIGHTEN.
Remove and replace the release valve.
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. Remove
and clean or replace check valve. DO NOT OVER-
TIGHTEN.
Airtankmust be replaced. Do not repair the leak.
WARNING I
DO NOT DRILL INTO, WELD OR
OTHERWISE MODIFY AIR TANK
OR IT WILL WEAKEN. THE TANK
CAN RUPTURE OR EXPLODE.
Operate safetyvalve manuallyby pullingon ring. If
valvestillleaks,it mustbe replaced.
Remove and clean or replace.
Loose pulley.
Low oil level.
Loose flywheel.
Loosecompressor mounting screws.
13ghtenpulley set screw, 70-80 in.-Ibs.
Maintain prescribedoillevel. Add oil.
Tighten screw 15-20 ft. Ibs.
Check screws.Tighten as required. (15-20 ft.-Ibs.)
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