Troubleshooting Guide - Craftsman 919.72755 Owner's Manual

Performing repairs may expose voltage sources, moving parts or compressed air sources,
moving parts or compressd 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 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 regulated
pressure gauge drops when an
accessory is used.
Air leak from safety valve.
D23122
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 enough.
Defective pressure switch release
valve.
Defective air tank.
Leaking seal.
It is normal for "some" pressure
drop to occur.
Possible defect in safety valve.
14 - 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.
Contact a Trained Service
Technician.
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.
Contact a Trained Service
Technician.
If there is an excessive amount of
pressure drop when the accessory
is used, adjust the regulator follow-
ing the instructions on page 6.
NOTE: Adjust the regulated pres-
sure under flow conditions (while
accesory is being used).
Operate safety valve manually by
pulling on ring. If valve still leaks,
it should be replaced.