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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 TAN K AIR PRESS URE.
PROBLEM
Excessive tank pressure - safety
valve pops off.
Air leaks at fittings.
Air leaks at pressure switch re-
lease valve,
Air leaks in air tank or at air tank
welds.
CAUSE
CORRECTION
Pressure switch does not shut off motor
when compressor
reaches
"cut-out"
pressure.
Pressure switch "cut-out" too high,
Tube fittings are not tight enough.
Defective
pressure
switch
release
valve.
Defective flappervalve in manifold.
Check valve seat damaged.
Defective air tank.
Air leaks between
head and
Leaking seal.
valve plate.
Pressure
reading
on the regu-
lated
pressure
gauge
drops
when
an accessory
is used,
It is normal for "some" pressure drop
to occur.
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.
Tighten fittings where
air can be heard escaping.
Check fittings with soapy water solution. DO NOT
OVERTIGHTEN.
Remove
and replace
the release
valve.
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.
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.
Inspect and replace upper manifold assembly.
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.
_ Torque head screws to 8 ft. Ibs. If this does not stop
leak, replace seal
If there is an excessive
amount
of pressure drop
when the accessory
is used, adjust the regulator
following the instructions
on page 6.
NOTE
Adjust
the regulated
pressure
under flow condi-
tions (while accesory
is being
used).
11
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