Air brake charging system troubleshooting, Symptom: what it may indicate: what you should do, Bendix – Bendix Commercial Vehicle Systems BENDIX 720CC COMPRESSOR User Manual

Page 18: Basic, Test

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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 is the definitive

method for judging excessive oil fouling/

oil passing. (See Appendix B, 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. 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, 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 Bendix

®

Wingman

®

Advanced

-equipped vehicle.

▲ You should consult the vehicle manufacturer's operating and service manuals, and any related literature,

in conjunction with the Guidelines above.

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