Craftsman 919.167621 Owner's Manual page 20

PROBLEM CORRECTION
Pressure read-
ing on the regu-
lated pressure
gauge drops
when an acces-
sory is used.
CAUSE
It is normal for "some"
3ressure drop to occur.
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).
Compressor is not large
enough for air requirement.
Knocking Noise. Possible defect in safety Operate safety valve manually
valve, by pulling on ring. If valve still
leaks, it should be replaced.
Defective check valve. Replace check valve.
Compressor is Prolonged excessive use of Decrease amount of air usage.
not supplying air.
enough air
to operate
accessories.
Hole in hose.
Check valve restricted.
Air leaks.
Restricted air intake filter.
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.
Replace check valve.
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.
Regulator knob Damaged regulator. Replace.
has continuous
air leak.
Regulator will Damaged regulator. Replace.
not shut off air
outlet.
N004395 20-ENG