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PROBLEM
CAUSE
CORRECTION
Knocking Noise.
Possible defect in safety
valve.
Operate safety valve manually
by pulling on ring. If valve still
leaks, it should be replaced.
Compressor mounting
screws loose
Tighten mounting screws,see
Parts manual for torque
specifications.
Carbon build-up in pump Have checked by a Trained
Service Technician.
Squealing
sound.
Compressor pump has no
oil.
See Oil-Checking paragraph in
the Maintenance section.
Defective check valve. Contact a Trained Service
Technician.
24- ENG
D29795