For unit repair information of the Bendix® valves, contact Allied® Signal Truck Brake Systems at 1-800-AIR-BRAK (1-800-247-2725).

1. Apply the parking brake.
2. Block the wheels.
3. Drain all of the air reservoirs. Refer to Air Brake Reservoir Draining.

Note: Tag the air lines for later installation.

4. Remove the air lines at the two-speed rear axle shift control valve. Refer to Hose and Line Replacement - Nylon Push-In Type Fitting.



5. Remove the two-speed rear axle shift control valve name plate screws (1).
6. Remove the two-speed rear axle shift control valve name plate (2).
7. Remove the two-speed rear axle shift control valve (3) from the instrument panel.
8. Inspect the air lines for the following conditions:

•

Damage

•

Kinks

•

Wear

1. Install the two-speed rear axle shift control valve (3) into the instrument panel.
2. Install the two-speed rear axle shift control valve name plate (2).

Caution: Refer to Fastener Caution in the Preface section.

3. Install the two-speed rear axle shift control valve name plate screws (1).

Tighten
Tighten the screws (1) until fully seated. Do not strip the two-speed rear axle shift control valve name plate screws (1).

4. Install the air lines at the two-speed rear axle shift control valve. Refer to Hose and Line Replacement - Nylon Push-In Type Fitting.
5. Inspect for air leaks using a soap solution.
6. Verify proper operation of the two-speed rear axle.
7. Remove the wheel blocks.