Troubleshooting Guide - Craftsman 919.166700 Operator's Manual

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
Excessive tank pressure - safety
valve pops off.
Air leaks at fittings.
Air leaks at or inside check valve
Air leaks at pressure switch
release valve.
Air leaks in air tank or at air tank
welds.
Air leaks between head and
valve plate.
Pressure reading on the regulat-
ed pressure gauge drops when
an accessory is used.
TROUBLESHOOTING
CAUSE
Pressure switch does not shut off
motor when compressor reaches
"cut-out" pressure.
Pressure switch "cut-out" too
high.
Tube fittings are not tight
Check valve seat damaged.
Defective pressure switch
release valve.
Defective air tank.
Leaking seal.
It is normal for "some" pressure
drop to occur.
17 - ENG
CORRECTION
Move On/Auto/Off lever to the
"OFF" position, if the outfit does
not shut off contact a Trained
Service Technician.
Contact a Trained Service
Technician.
Tighten fittings where air can be
heard escaping. Check fittings
with soapy water solution. DO
NOT OVERTIGHTEN.
A defective check valve results in
a constant air leak at the pres-
sure 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"
Contact a Trained Service
Technician.
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.
Contact a Trained Service
Technician.
If there is an excessive amount
of pressure drop when the
accessory is used, adjust the
regulator following the instruc-
tions in the "Description of
Operation" paragraph in the
"Operation Section.
NOTE: Adjust the regulated
pressure under flow conditions
D23012