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Symptom:
4.0 Oil in Supply
or Service
Reservoir*
(air dryer installed)
(continued)
Crankcase Flooding
Consider installing a compressor bottom drain kit
(where available) in cases of chronic oil passing where
all other operating conditions have been investigated.
Bendix compressors are designed to have a 'dry'
sump and the presence of excess oil in the crankcase
can lead to oil carryover.
*If a maintained Bendix
filter is installed, call 1-800-AIR-BRAKE (1-800-247-2725) and speak to a Tech Team member.
5.0 Oil present
at valves (e.g. at
exhaust, or seen
during servicing).
26
A-8
What it may indicate:
Other (cont.)
(i) Poorly filtered inlet air (poor air
quality to compressor).
(j) Governor malfunction or setting.
(k) Compressor malfunction.
PuraGuard
system filter or Bendix
®
®
Air brake system valves are required
to tolerate a light coating of oil.
What you should do:
Check for leaking, damaged or defective
compressor air inlet components (e.g.
induction line, fittings, gaskets, filter bodies,
etc.). Repair inlet components as needed.
Note: Dirt ingestion will damage compressor
and is not covered under warranty.
Inspect the
engine air
cleaner.
Go to Test 4 on page A-15.
If you found excessive oil present in the
service reservoir in step 4.0 (b) above and
you did not find any issues in steps 4.0 (c)
through 4.0 (j) above, the compressor may
be passing oil.
Replace compressor. If still under warranty,
follow normal warranty process. Note: After
replacing a compressor, residual oil may
take a considerable period of time to be
flushed from the air brake system.
PuraGuard QC
™
®
A small amount of oil does not affect SAE
J2024** compliant valves.
Check that regular maintenance is being
performed and that the amount of oil in the
air tanks (reservoirs) is within the acceptable
range shown on the Bendix
cup (see also column 5 of Table A on page
A-3). Return the vehicle to service.
For oil-sensitive systems, see page 16.
** SAE J2024 outlines tests all air brake system pneumatic
components need to be able to pass, including minimum
levels of tolerance to contamination.
Genuine
Bendix
valves are
all SAE
J2024
compliant.
oil coalescing
BASIC
test
®
™
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