11 — ENG
D20419 Rev. 0 2/22/00
CAUSE
CORRECTION
Excessive tank pressure - safety
valve pops off.
Pressure switch does not shut off mo-
tor when compressor reaches “cut-out”
pressure.
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.
Return the outfit to Sears Service Center to check and
adjust, or replace switch.
Tube fittings are not tight enough.
Tighten fittings where air can be heard escaping.
Check fittings with soapy water solution. DO NOT
OVERTIGHTEN.
PROBLEM
Air leaks at fittings.
Pressure switch “cut-out” too high.
Air leaks at pressure switch re-
lease valve.
Inspect and replace upper manifold assembly.
Check valve seat damaged.
Defective air tank.
Air leaks in air tank or at air tank
welds.
DO NOT DRILL INTO, WELD OR OTHERWISE
MODIFY AIR TANK OR IT WILL WEAKEN. THE
TANK CAN RUPTURE OR EXPLODE.
Air leaks between head and valve
plate.
Leaking seal.
Torque head screws to 4 ft. lbs. If this does not
stop leak, replace seal.
Pressure reading on the regu-
lated pressure gauge drops
when an accessory is used.
It is normal for “some” pressure drop to
occur.
NOTE
Adjust the regulated pressure under flow conditions
(while accessory is being used).
If there is an excessive amount of pressure drop when
the accessory is used, adjust the regulator following
the instructions on page 6.
A defective flapper 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 valve.
Air tank must be replaced. Do not repair the leak.
Defective flapper valve in manifold.
TROUBLESHOOTING GUIDE
PERFORMING REPAIRS MAY EXPOSE VOLTAGE SOURCES, MOVING PARTS OR COMPRESSED AIR
SOURCES. PERSONAL INJURY MAY OCCUR. PRIOR TO ATTEMPTING ANY REPAIRS, UNPLUG THE
COMPRESSOR AND BLEED OFF TANK AIR PRESSURE.
