Craftsman 919.165613 Owner's Manual page 21

ProBLem
Knocking Noise.
Compressor is
not supplying
enough air
to operate
accessories.
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
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
filter removed. Refer to the
Air Filter paragraph in the
Maintenance section.
21 - ENG
CorreCTioN
N004083