Porter-Cable CPLC7060V Instruction Manual page 20

PROBLEM
Knocking Noise.
Compressor is not
supplying enough
air to operate
accessories.
D23269
CAUSE
Possible defect in safe-
ty valve.
Defective check valve.
Loose pulley
Loose flywheel
Compressor mounting
screws loose
Loose belt
Carbon build-up in
pump
Belt to tight
Prolonged excessive use
of air.
Compressor is not large
enough for air require-
ment.
Hole in hose.
Check valve restricted.
Air leaks.
Restricted air intake filter
Loose belt.
20 - ENG
CORRECTION
Operate safety valve manually by
pulling on ring. If valve still leaks,
it should be replaced.
Remove and clean, or replace.
Tighten pulley set screw,
70-80 in.-lbs.
Tighten flywheel screw,
15-20 ft.-lbs.
Tighten mounting screws,
15-20 ft.-lbs.
Loosen wingnut and then tighten
wingnut until it contacts the wash-
er, plus one turn.
Have checked by a Trained
Service Technician.
Loosen wingnut and then tighten
wingnut until it contacts the wash-
er, plus one turn.
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 compressor
with the filter removed. Refer to
the "Air Filter" paragraph in the
"Maintenance " section
Loosen wingnut and then tighten
wingnut until it contacts the wash-
er, plus one turn.