BENDIX ATR-2 ANTILOCK TRACTION VALVE Scheda tecnica del servizio - Pagina 7

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TRAILER SUPPLY

INLET EXHAUST

PROP. PISTON

REAR AXLE

RESERVOIR

FIGURE 11 - TRACTION CONTROL BRAKE APPLICATION

WARNING! PLEASE READ AND FOLLOW

THESE

INSTRUCTIONS

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

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

CONTROLLER

AVOID

vehicle

manufacturer's

component or plug unless you are certain all

system pressure has been depleted.

8. Use only genuine Bendix

components and kits. Replacement hardware,

tubing, hose, fittings, etc. must be of equivalent

size, type and strength as original equipment and

be designed specifically 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 specifically 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 Antilock 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.

OPERATION & LEAKAGE TESTS

GENERAL

A change in vehicle braking characteristics or a low pressure

warning may indicate a malfunction in one or the other brake

circuit, and although the vehicle air brake system may

continue to function, the vehicle should not be operated

™

until the necessary repairs have been made and both

braking circuits, including the pneumatic and mechanical

devices are operating normally. Always check the vehicle

brake system for proper operation after performing brake

work and before returning the vehicle to service.

To properly test the function of the ATR-2

test gauges or gauges of known accuracy must be used.

OPERATION TEST

1. Drain air pressure from all vehicle reservoirs.

TRACTION

SOLENOID

BRAKE

VALVE

CHECK VALVE

RELAY PISTON

INLET EXHAUST

MODULATOR

SERVICE BRAKE

replacement parts,

™

valve, a pair of