Bendix Commercial Vehicle Systems AR-1 ANTILOCK RELAY VALVE 01/11 - Manual (Page 5)

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response is noted at all wheels, inspect for a kinked or
obstructed air line leading to or from the AR-1
™ valve.
2. If a complete release of the brakes is noted at some,
but not all wheels, test the antilock modulator between
the AR-1
™ valve and the brake actuator for proper
operation. If an incomplete release is noted at all
wheels, inspect for a kinked or obstructed air line
leading to or from the AR-1
™ valve.
3. During brake release confi rm that a slight “puff” of air
exits at the AR-1 ™ valve’s quick exhaust port in the
cover. Air exiting at this exhaust port indicates the
AR-1
™ valve integral quick release is functioning.
LEAKAGE TESTS
1. Build the air system pressure to governor cut-out, apply
a soap solution to the exhaust port in body. The leakage
noted should not exceed a one inch bubble in less than
three (3) seconds.
2. Make and hold a full brake application and apply a soap
solution to the exhaust ports in the body and cover and
around the cover where it joins the body. The leakage
noted should not exceed a one inch bubble in less than
three (3) seconds at any exhaust port.
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 a
Bendix
® 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 ® 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.
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.
VALVE REMOVAL
1. Park the vehicle on a level surface and block the wheels
and/or hold the vehicle by means other than the air
brakes.
2. Drain the air pressure from all vehicle reservoirs.
3. Identify, mark or label all air lines and wiring cables and
their respective connections on the valve or antilock
controller to facilitate ease of installation.
4. Disconnect all air lines and wiring.
5. Remove the valve and controller assembly from the
vehicle.
VALVE INSTALLATION
1. Install all air line fi ttings and plugs making certain thread
sealing material does not enter the valve.
2. Install the assembled valve on the vehicle.
3. Reconnect all air lines and wiring cables to the valve
and controller assembly using the identifi cation made
during VALVE REMOVAL step 3.
4. After installing the valve and controller assembly, test all
air fi ttings for excessive leakage and tighten as needed.
DISASSEMBLY
GENERAL
The following disassembly and assembly procedure is
presented for reference purposes only and presupposes
that the appropriate maintenance kit is on hand at the
time of disassembly. The instructions provided with