Craftsman 919.157260 Owner's Manual page 24

PROBLEM
Knocking Noise. Possible defect in safety
Excessive belt
wear.
A13567
CAUSE
valve.
Loose pulley.
Loose flywheel.
Compressor or engine
mounting screws loose.
Loose belt.
Carbon build-up in pump.
Belt to tight.
Stiffener bar loose.
Low oil level (compressor
or engine)
Loose belt.
Tight belt.
Loose pulley.
Pulley misalignment.
Operate safety valve manually
by pulling on ring. If valve still
leaks, it should be replaced.
Tighten pulley set screw,
see air compressor diagram for
torque specifications.
Tighten flywheel screw,
see air compressor diagram
for torque specifications.
Tighten mounting screws,
see air compressor diagram for
torque specifications.
Check belt tension, see
Adjusting Belt Tension in the
Maintenance section
Have checked by a Trained
Service Technician.
Check belt tension, see
Adjusting Belt Tension in the
Maintenance section
Check both nuts and tighten if
required.
Maintain prescribed oil level.
Add oil.
Check belt tension, see
Adjusting Belt Tension in the
Maintenance section
Check belt tension, see
Adjusting Belt Tension in the
Maintenance section
Have checked by a Trained
Service Technician.
See Motor Pulley/Flywheel
Alignment paragraph in the
Maintenance section.
24- ENG
CORRECTION