22
A-4
Air Brake Charging System Troubleshooting
1.0 Oil Test Card
Results
Not a valid test.
Discontinue using this test.
Do not use this card test to diagnose compressor
"oil passing" issues. They are subjective
and error prone. Use only the Bendix
®
Air
System Inspection Cup (BASIC
™
) test and the
methods described in this guide for advanced
troubleshooting.
The Bendix BASIC test should be the
definitive method for judging excessive
oil fouling/oil passing.
(See Appendix A,
on page A-16 for a flowchart and expanded
explanation of the checklist used when
conducting the BASIC test.)
Symptom:
What it may indicate:
What you should do:
How to use this guide:
Find the
symptom(s)
that you see, then move to the right to
find the possible causes (“
What it may indicate
”) and remedies
(“
What you should do
”).
Review the warranty policy before performing any intrusive
compressor maintenance. Unloader or cylinder head gasket
replacement and resealing of the bottom cover plate are usually
permitted under warranty. Follow all standard safety procedures
when performing any maintenance.
Look for:
Normal - Charging system is working within
normal range.
Check - Charging system needs further
investigation.
Bendix
®
BASIC
™
Test
GENERAL SAFETY GUIDELINES
WARNING! PLEASE READ AND FOLLOW THESE INSTRUCTIONS
TO AVOID PERSONAL INJURY OR DEATH:
When working on or around a vehicle, the following guidelines should be observed AT ALL TIMES:
▲
Park the vehicle on a level surface, apply the
parking brakes and always block the wheels.
Always wear personal protection equipment.
▲
Stop the engine and remove the ignition key
when working under or around the vehicle.
When working in the engine compartment,
the engine should be shut off and the ignition
key should be removed. Where circumstances
require that the engine be in operation, EXTREME
CAUTION should be used to prevent personal
injury resulting from contact with moving,
rotating, leaking, heated or electrically-charged
components.
▲
Do not attempt to install, remove, disassemble
or assemble a component until you have read,
and thoroughly understand, the recommended
procedures. Use only the proper tools and
observe all precautions pertaining to use of those
tools.
▲
If the work is being performed on the vehicle’s
air brake system, or any auxiliary pressurized air
systems, make certain to drain the air pressure
from all reservoirs before beginning ANY work
on the vehicle. If the vehicle is equipped with a
Bendix
®
AD-IS
®
air dryer system, a Bendix
®
DRM
™
dryer reservoir module, or a Bendix
®
AD-9si
®
air
dryer, be sure to drain the purge reservoir.
▲
Following the vehicle manufacturer ’s
recommended procedures, deactivate the
electrical system in a manner that safely removes
all electrical power from the vehicle.
▲
Never exceed manufacturer’s recommended
pressures.
▲
Never connect or disconnect a hose or line
containing pressure; it may whip and/or cause
hazardous airborne dust and dirt particles. Wear
eye protection. Slowly open connections with
care, and verify that no pressure is present. Never
remove a component or plug unless you are
certain all system pressure has been depleted.
▲
Use only genuine Bendix
®
brand replacement
parts, components and kits. Replacement
hardware, tubing, hose, fi ttings, wiring, etc. must
be of equivalent size, type and strength as original
equipment and be designed specifi cally for such
applications and systems.
▲
Components with stripped threads or damaged
parts should be replaced rather than repaired.
Do not attempt repairs requiring machining or
welding unless specifi cally stated and approved
by the vehicle and component manufacturer.
▲
Prior to returning the vehicle to service, make
certain all components and systems are restored
to their proper operating condition.
▲
For vehicles with Automatic Traction Control
(ATC), the ATC function must be disabled (ATC
indicator lamp should be ON) prior to performing
any vehicle maintenance where one or more
wheels on a drive axle are lifted off the ground
and moving.
▲
The power MUST be temporarily disconnected
from the radar sensor whenever any tests USING
A DYNAMOMETER are conducted on a vehicle
equipped with a Bendix
®
Wingman
®
system.
▲
You should consult the vehicle manufacturer's operating and service manuals, and any related literature,
in conjunction with the Guidelines above.
