Slow Build (9.0); Oil Consumption (6.0); At Air Dryer Cartridge (7.0); In The Ping Tank Or Compressor Discharge Aftercooler (8.0) - BENDIX TU-FLO 700 COMPRESSOR Manual

Symptom:
6.0 Excessive oil
consumption in
engine.
7.0 Oil present at
air dryer cartridge
during
maintenance.
8.0 Oil in ping tank
or compressor dis-
charge aftercooler.
9.0 Air brake
charging system
seems slow to
build pressure.
What it may indicate:
A problem with engine or other engine
accessory.
The engine
service
manual has
more
information.
Air brake charging system is
functioning normally.
Oil shown
leaking
from an air
dryer
cartridge.
Air brake charging system is
functioning normally.
(a) Air brake charging
functioning normally.
(b) Air brake system leakage.
(c) Compressor may be undersized for
the application.
(d) Compressor unloader mechanism
malfunction.
(e) Damaged compressor
gasket.
What you should do:
ð See engine service manual.
ð Air dryers remove water and oil from the air
brake charging system. A small amount of
oil is normal. Check that regular
maintenance is being performed and that
the amount of oil in the air tanks
(reservoirs) is within the acceptable range
shown by the BASIC Test (see also column
5 of Table A on page 15). Replace the air
dryer cartridge as needed and return the
vehicle to service.
ð Follow vehicle O.E. maintenance
recommendation for these components.
ð Using dash gauges, verify that the
system
compressor builds air system pressure
from 85-100 psi in 40 seconds or less with
engine at full governed rpm. Return the
vehicle to service.
ð Go to Test 2 on page 26.
ð See Table A, column 1, on page 15 for
some typical compressor applications. If
the compressor is "too small" for the
vehicle's role, for example, where a
vehicle's use has changed, then upgrade
the compressor. Note: The costs incurred
(e.g. installing a larger capacity
compressor, etc.) are not covered under
original compressor warranty.
ð Go to Test 6 on page 27.
ð An air leak at the head gasket may indicate
head
a downstream restriction such as a
freeze-up or carbon blockage and/or could
indicate a defective or missing safety
valve. Find blockage (go to 9.0(f) for
details.) and then replace the compressor.
Do not re-use the safety valve without
testing. See Symptom 12.0(a).
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