For 1990-2009 cars only
Removal Procedure
- Apply the parking brake.
- Block the wheels.
- Drain all of the air reservoirs. Refer to Draining Reservoirs . In Air Brakes.
- Disconnect the two-speed rear axle shift dash panel switch wiring connector.
- Remove the two-speed rear axle shift dash panel switch from the two-speed rear axle shift quick release valve.
Installation Procedure
- Install the two-speed rear axle shift dash panel switch into the two-speed rear axle shift quick release valve.
- Connect the two-speed rear axle shift dash panel switch wiring connector.
- Start the engine. Charge the system to the air compressor governor cutout point.
- Stop the engine.
- Inspect for air leaks using a soap solution. Air leakage is not allowed.
- Remove the wheel blocks.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten
Tighten the two-speed rear axle shift dash panel switch to 12 N·m
(106 lb ft).
