Craftsman 919.167783 Owner's Manual page 20

PROBLEM
Pressure read-
ing on the
regulated pres-
sure gauge
drops when an
accessory is
used.
Knocking
Noise.
Compressor is
not supplying
enough air to
operate acces-
sories.
Regulator
knob has
continuous air
leak.
Regulator will
not shut off air
outlet.
A20361
CAUSE
It is normal for "some"
pressure drop to occur.
Possible defect in safety
valve.
Defective check 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.
Damaged regulator.
Damaged regulator.
If there is an excessive
amount of pressure drop when
the accessory is used, adjust
the regulator following the
instructions in the "Description
of Operation" paragraph 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.
Remove and clean, or replace.
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.
Remove and clean, or replace.
Tighten fittings.
Clean or replace air intake
filter. Do not operate the
air compressor with the fil-
ter removed. Refer to the
"Air Filter" paragraph in the
"Maintenance" section.
Replace.
Replace.
20- ENG
CORRECTION