PROBLEM
Knocking Noise. Possible defect in safety
Squealing
sound.
Air vent on
dipstick is
blocked
CAUSE
valve.
Defective check valve.
Compressor mounting
screws loose
Carbon build-up in pump
Compressor pump has no
oil.
Air vent clogged with
debris
Operate safety valve manually
by pulling on ring. If valve still
leaks, it should be replaced.
Remove and clean, or replace.
Tighten mounting screws,see
Parts manual for torque
specifications.
Have checked by a Trained
Service Technician.
See Oil-Checking paragraph in
the Maintenance section.
Clean air vent or replace
dipstick
25- ENG
CORRECTION
D28301