FIGURE 9 - TYPICAL BENDIX

CR-16

™

AIR BRAKE SYSTEM

8. Make a full brake application and note that both test

gauges register the same pressure. IMPORTANT: If

during testing the service port pressure is SLOWLY

increased from approximately 70 psi to a full (100 psi

or greater) brake application, the Bendix

AR‑2

™

valve

MAY begin to cycle between an apply and exhaust

mode. This condition is normal while the AR‑2

™

valve

is transitioning from the proportioning mode to the

full delivery mode and will only occur if the service

application is SLOWLY increased as described.

Cycling will not occur or can be stopped by increasing

or decreasing service port pressure.

9. Remove the test gauges from the AR‑2

™

valve.

10. If the AR‑2

™

valve fails to perform as described it

should be replaced or repaired using genuine Bendix

replacement parts or kits.

LEAKAGE TESTS

1. Build the air system pressure to governor cut‑out. With

the dash mounted trailer supply valve activated for

tractor/trailer operation, apply a soap solution to both

exhaust ports (one in the cover and one in the body).

The leakage noted should not exceed a 1" bubble in

less than 3 seconds at either exhaust port.

2. Make and hold a full brake application and apply a

soap solution to both exhaust ports and around the

cover where it joins the body. The leakage noted should

not exceed a 1" bubble in less than 3 seconds at any

exhaust port with no leakage detected between the

cover and body.

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 AR‑2

™

valve and controller assembly from

the vehicle.

VALVE INSTALLATION

1. Install all air line 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 identication made

during VALVE REMOVAL step 3.

4. After installing the valve and controller assembly, test

all air ttings for excessive leakage and tighten as

needed.

DASH CONTROL VALVES

BRAKE VALVE

BENDIX

M-21

™

MODULATORS

TRACTOR PROTECTION

BENDIX

AR-2

™

WITH

CONTROLLER

1 2 3 4 5 6 7 8 9 10 11 12

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