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CAUSE
Possible defect in safety
valve.
PROBLEM
KnockingNoise.
Defective check valve.
Loose pulley.
Loose flywheel.
Compressor mounting
screws loose.
Loose belt.
Carbon build-up in pump,
Belt to tight,
Excessive belt Loose belt.
wear.
Tight belt,
Loose pulley.
Squealing
sound,
Pulley misalignment.
Compressor pump has no
oil.
Loose belt.
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,
145-165 in.-Ibs,
Tighten flywheel screw,
33-37 fL-Ibs,
Tighten mounting screws,
20-25 fL-Ibs,
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 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 l=ulley/Flywheel
Alignment paragraph in the
Maintenaee section.
See Oil-Checking paragraph in
the Maintenace section,
Check belt tension, see
Adjusting Belt Tension in the
Maintenance section,
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