Craftsman 919.166700 Operator's Manual page 18

PROBLEM
Knocking Noise.
Compressor is not supplying
enough air to operate acces-
Regulator knob has continuous
air leak.
Regulator will not shut off air out-
let.
D23012
CAUSE
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
18 - ENG
CORRECTION
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 require-
ment. 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 compres-
sor with the filter removed. Refer
to the "Air Filter" paragraph in
the "Maintenance " section.
Replace
Replace