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PROBLEM
Pressure reading
on the regulated
pressure gauge
(if equipped)
drops when an
accessory is
used.
Air leak from
safety valve.
Compressor is
not supplying
enough air
to operate
accessories.
Restricted air
intake
Regulator knob
has continuous
air leak.
Regulator will
not shut off air
outlet.
CAUSE
It is normal for "some"
pressure drop to occur.
Possible defect in safety
valve.
Possible defect in safety
valve.
Prolonged excessive use
of air.
Compressor is not large
enough for air requirement.
Hole in hose.
Check valve restricted.
Air leaks.
Restricted air intake filter
Dirty air filter.
Damaged regulator
Damaged regulator
If there is an excessive amount
of pressure drop when the
accessory is used, adjust the
regulator as instructed in the
Operation section.
NOTE: Adjust the regulated
pressure under flow conditions
(while accessory is being
used).
Operate safety valve manually
by pulling on ring. If valve still
leaks, it should be replaced.
Operate safety valve manually
by pulling on ring. If valve still
leaks, it should be replaced.
Decrease amount of air usage.
Check the accessory air
requirement. If it is higher than
the SCFM or pressure supplied
by your air compressor, you
need a larger compressor.
Check and replace if required.
Check and replace if required.
Remove and clean, or replace.
Refer to the "To Replace or
Clean Check Valve" in the
"Service and Adjustment"
section.
Tighten fittings.
Clean or replace air intake
filter. Do not operate the
air compressor with the
filter removed. Refer to the
"Air Filter" paragraph in the
"Maintenance" section.
Clean or replace. See "Air
Filter" paragraph in the
"Maintenance" section.
Have checked by a Trained
Service Technician.
Have checked by a Trained
Service Technician.
21- ENG
CORRECTION
A10055
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