User's Manual

DEL
SER
SUP
DEL
SER
SUP
PRIMARY
SUP
DEL
EXH
Bulletin No: TCH-013-018 Effective Date: 8/24/2009 Cancels: N/A Page: 2 of 3
Subject: Bendix
®
AT-3
™
Valve Leakage
Foot Brake
Valve
Supply
Supply
Trailer Modulator Valve
From Trailer
Control Valve
Tractor
Protection
Valve
Quick
Release
Valve
ABS
Modulator
AT-3
™
Solenoid
Valve - Steer
Axle (ESP)
ABS
Modulator
ABS
Modulator
ABS
Modulator
Relay
Valve
AT-3
™
Solenoid
Valve - Drive Axle
(ATC / ESP)
FIGURE 2 - EXAMPLE APPLICATIONS OF BENDIX
®
AT-3
™
SOLENOID VALVE; 6X4 TRACTOR WITH
TRACTION CONTROL, ELECTRONIC STABILITY AND HILL START AID
WARNING! Please READ and follow these instructions to
avoid personal injury or death:
When working on or around a vehicle, the following general
precautions should be observed at all times.
1. Park the vehicle on a level surface, apply the parking
brakes, and always block the wheels. Always wear safety
glasses.
2. Stop the engine and remove 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.
3. 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.
4. 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 an AD-IS
®
air dryer system or a dryer
reservoir module, be sure to drain the purge reservoir.
5. Following the vehicle manufacturer’s recommended
procedures, deactivate the electrical system in a manner
that safely removes all electrical power from the vehicle.
6. Never exceed manufacturer’s recommended pressures.
7. 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.
8. Use only genuine Bendix
®
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.
9. 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.
10. Prior to returning the vehicle to service, make certain all
components and systems are restored to their proper
operating condition.
11. 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.
Secondary
Secondary
Primary
Primary
AT-3
™
Solenoid Valve
(HSA-Hill Start Aid)
Double
Check
Valve
Pressure
Reducing
Valve
Piloted
Relay Valve