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TROUBLESHOOTING GUIDE
PERFORMING REPAIRS MAY EXPOSE VOLTAGE SOURCES, MOVING PARTS OR COM-
PRESSED AIR SOURCES. PERSONAL INJURY MAY OCCUR. PRIOR TO ATTEMPTING ANY
REPAIRS, UNPLUG THE COMPRESSOR AND BLEED OFF TANK AIR PRESSURE.
PROBLEM
Excessive tank pressure - safety
valve pops off.
Air leaks at fittings.
CAUSE CORRECTION
Pressure switch does not shut off motor
when compressor reaches "cut-out" pres-
sure.
Air leaks at or inside check valve.
Air leaks at pressure switch re-
lease valve.
Air leaks in air tank or at air tank
welds.
Pressure switch "cut-out" too high.
Tube fittings are not tight enough.
Detective or dirty check valve.
Defective pressure switch release valve.
Defective check valve.
Defective air tank.
Move the pressure switch lever to the "OFF" position. If
the outfit doesn't shut off, and the electrical contacts are
welded together, replace the pressure switch.
If the contacts are good, check to see if the pin in the
bottom of the pressure release valve is stuck. If it does not
move freely, replace the valve.
Return the outfit to Sears Service Center to check and
adjust, or replace switch.
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 where 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.
Air tank must be replaced. Do not repair the leak.
DO NOT DRILL INTO, WELD OR OTHER-
WISE MODIFY AIR TANK OR IT WILL
WEAKEN. THE TANK CAN RUPTURE
OR EXPLODE.
Air leaks between head and valve Leaking gasket. Torque head screws to 8 It. lbs. If this does not stop leak,
plate, replace gasket.
It is normal for "some" pressure drop to
occur.
Pressure reading on the regulated
pressure gauge drops when an ac-
cessory is used.
If there is an excessive amount of pressure drop when the
accessory is used, adjust the regulator following the
instructions on page 10.
NOTE
Adjust the regulated pressure under flow
conditions (while accesory isbeing used).
12
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