Cam Brake Assembly Replacement Front

1. Block the rear wheels.
2. Drain the air reservoirs. Refer to Draining Reservoirs in Air Brakes.
3. Raise the front axle and support the front axle with safety stands. Refer to Lifting and Jacking the Vehicle in General Information.
4. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation (Front) in Tires and Wheels.



5. Remove the brake drum. Refer to Brake Drum Replacement .
6. Remove the air line from the front air brake chamber. Refer to Trailer Coupling Hose and Line Bracket Replacement in Air Drums.
7. Remove the wheel speed sensor (if equipped). Refer to Wheel Speed Sensor Replacement in Antilock Brakes.
8. Remove the bolts and the washers.
9. Remove the cam brake assembly from the knuckle.

1. Install the cam brake assembly to the knuckle.

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.

2. Install the washers and the bolts.

Tighten
Tighten the front brake assembly bolts to 280 N·m (206 lb ft).

3. Install the wheel speed sensor (if equipped). Refer to Wheel Speed Sensor Replacement in Antilock Brakes.
4. Install the air line to the front air brake chamber. Refer to Trailer Coupling Hose and Line Bracket Replacement Air Drums.
5. Install the brake drum. Refer to Brake Drum Replacement .
6. Adjust the front wheel bearings (if needed). Refer to Wheel Bearing Adjustment .
7. Install the tire and wheel assembly.
8. Remove the safety stands and lower the vehicle.
9. Start the engine.
10. Charge the air system to the air compressor governor valve cut-out point.
11. Check for proper brake operation.
12. Stop the engine.
13. Set the parking brake.
14. Remove the wheel blocks.

Cam Brake Assembly Replacement Rear

1. Block the rear wheels.
2. Drain all air reservoirs. Refer to Draining Reservoirs in Air Brakes.



3. Cage the rear air brake chamber. Refer to Caging the Rear Air Brake Chamber .
4. Raise the rear axle and support the rear axle with safety stands. Refer to Lifting and Jacking the Vehicle in General Information.
5. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation (Dual/Rear) in Tires and Wheels.
6. Remove the brake drum. Refer to Brake Drum Replacement .
7. Remove the air line from the rear air brake chamber. Refer to Trailer Coupling Hose and Line Bracket Replacement in Air Drums.
8. Remove the wheel speed sensor (if equipped). Refer to Wheel Speed Sensor Replacement in Antilock Brakes.
9. Remove the bolts and the washers.
10. Remove the rear brake assembly from the rear axle.

1. Install the rear cam brake assembly to the rear axle.

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.

2. Install the bolts and the washers.

Tighten
Tighten the rear brake assembly bolts to 220 N·m (162 lb ft).

3. Install the wheel speed sensor (if equipped). Refer to Wheel Speed Sensor Replacement in Antilock Brakes.
4. Install the air line to the rear air brake chamber. Refer to Trailer Coupling Hose and Line Bracket Replacement in Air Drums.
5. Install the brake drum. Refer to Brake Drum Replacement .
6. Adjust the rear wheel bearings (if needed). Refer to Wheel Bearing Adjustment .
7. Install the tire and wheel assembly.
8. Remove the safety stands and lower the vehicle.
9. Start the engine.
10. Charge the air system to the air compressor governor valve cut-out point.
11. Check for proper brake operation.
12. Stop the engine.
13. Set the parking brake.
14. Remove the wheel blocks.