15
(a)
Symptom:
What it may indicate:
What you should do:
2.2 Oil leaking
from compressor:
(a) Excessive leak at head gasket.
(b)
Leak at bottom cover plate.
(c)
Leak at internal rear flange
gasket.
(d)
Leak through crankcase.
(e) (If unable to tell source of leak.)
Go to Test 1 on page 24.
Reseal bottom cover plate using RTV
silicone sealant.
Replace compressor.
Replace compressor.
Clean compressor and check periodically.
Air brake charging system functioning
normally.
Air dryers remove water and oil from the air
brake charging system.
Check that regular maintenance is being
performed. Return the vehicle to service.
An optional kit (Bendix piece number
5011327 for the Bendix
®
AD-IS
®
or AD-IP
™
air dryers, or 5003838 for the Bendix
®
AD-9
™
air dryer) is available to redirect the air dryer
exhaust.
3.0 Oil at air dryer
purge/exhaust or
surrounding area
(c)
2.0 Oil on the
Outside of the
Compressor
Find the source and repair. Return the vehicle
to service.
Repair or replace as necessary. If the
mounting bolt torques are low, replace the
gasket.
Replace the fitting gasket. Inspect inlet hose
and replace as necessary.
Replace gasket or fitting as necessary to
ensure good seal.
Inspect and repair as necessary.
Engine and/or other accessories
leaking onto compressor.
(a)
Leak at the front or rear (fuel
pump, etc.) mounting flange.
(b) Leak at air inlet fitting.
(c) Leak at air discharge fitting.
(d) Loose/broken oil line fittings.
2.1 Oil leaking at
compressor / engine
connections:
Head
gaskets
and rear
flange
gasket
locations.
(c)
