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www.bendix.com 1-800-AIR-BRAKE (1-800-247-2725)
Handbook Section Index
How to use the Air Brake Handbook
DIN symbols are used in this handbook.
Device Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Air Brake System General Precautions . . . . . . . . . 4
General Precautions . . . . . . . . . . . . . . . . . . . . . . . . 4
Section One: A One-Page Introduction to
Air Brake Systems . . . . . . . . . . . . . . . . . . . . . 5
Section Two: The Charging System . . . . 6-14
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
Compressor Maintenance Guidelines . . . . . . . . . . . 9
Governors and Components . . . . . . . . . . . . . . . . 10
Reservoirs and Components . . . . . . . . . . . . . . . . 11
Air Dryers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Air Dryers and Filters . . . . . . . . . . . . . . . . . . . . . . 13
Miscellaneous Charging System Related
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Section Three: The Control System . . . .17-32
Dual Circuit Brake Valves . . . . . . . . . . . . . . . . . 15-16
Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Slack Adjusters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Foundation Brakes . . . . . . . . . . . . . . . . . . . . . . . 19-20
Quick Release, Ratio Valves . . . . . . . . . . . . . . . . . . 21
Ratio, Proportioning Valves . . . . . . . . . . . . . . . . . . 22
Relay Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Push-Pull Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Spring Brake Valves . . . . . . . . . . . . . . . . . . . . . . . . 25
Lever Operated Control Valves . . . . . . . . . . . . . . 26
Miscellaneous Control Valves . . . . . . . . . . . . . . . . 27
Section Four: Tractor/Trailer Parking
and Emergency Systems . . . . . . . . . . . . .28-32
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28-29
Dash Control Modules . . . . . . . . . . . . . . . . . . . . . 29
Tractor Protection Valves . . . . . . . . . . . . . . . . . . . 30
Trailer Spring Brake Valves . . . . . . . . . . . . . . . . . 31-32
Section Five: Trailers/Converter
Dolly Brakes . . . . . . . . . . . . . . . . . . . . . . .33-34
Section Six:
Antilock Braking Systems (ABS) . . . . 35 - 48
ABS Components,Truck and
Tractor ABS Operation . . . . . . . . . . . . . . . . . . . 35-36
Truck and Tractor ABS Operation, ATC . . . . . . . 37
Straight Truck Sample Schematic . . . . . . . . . . . . . 38
Advanced ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Advanced ABS Operation . . . . . . . . . . . . . . . . . . 40
Advanced ABS Features . . . . . . . . . . . . . . . . . . . 40-41
Trailer ABS Components and Operation . . . . . . . 42
Trailer ABS Operation and Features,
PLC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Troubleshooting ABS . . . . . . . . . . . . . . . . . . . . . 43-44
Section Seven: Miscellaneous commercial
vehicle products from Bendix . . . . . . . . .45-46
Section Eight:
Air Brake System Fundamentals . . . . . . . . 47
Braking Force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Leverage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49-50
Deceleration . . . . . . . . . . . . . . . . . . . . . . . . . . . 50-51
Compressed Air . . . . . . . . . . . . . . . . . . . . . . . . . 51-53
Compressed Air Brakes . . . . . . . . . . . . . . . . . . . . . 54
S-Cam and Air Disc Brakes . . . . . . . . . . . . . . . . . . 55
Air Brake System Balance: Pneumatic Systems . . 56
Air Brake System Balance: Mechanical Systems . 57
Section Nine: Air Brake System
Troubleshooting Tests . . . . . . . . . . . . . . . 58-60
Bendix Videos and Literature . . . . . . . . . . . . . . 61-62
List of Service Data Sheets . . . . . . . . . . . . . . . . . . 63
Sample Schematic . . . . . . . . . . . . . . inside front cover
This nine-section handbook provides an introduction to the use and
operation of Bendix air brake systems and devices.
Components are introduced and shown with typical system diagrams
to show where they are used. As new components are introduced and
their function explained, they gradually build up to a complete
functioning air brake system.
Partial system-drawings, throughout the manual, assist in explaining of
the use of the components. See the front inside cover for an example
of a tractor system schematic in color.
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