Rear Brake Rotor Replacement Except Dual Wheels

Tools Required

Notice: Any new rotor must have the protective coating removed from the friction surfaces before being placed in service. Remove the protective coating using denatured alcohol or an equivalent brake cleaner, and wipe the surface clean with clean cloths. Do not use gasoline, kerosene, or other oil base solvents which may leave an oily residue. This residue is damaging to the brake lining and is flammable.

1. Release the park brake.
2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
3. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
4. Mark the relationship of the rotor to the hub.
5. Remove the brake caliper bracket mounting bolts.

Notice: Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.

6. Remove the brake caliper and brake caliper bracket as an assembly and support with heavy mechanic's wire or equivalent. DO NOT disconnect the hydraulic brake flexible hose from the caliper.
7. Remove the rotor retaining push nuts from the wheel studs (if applicable).
8. It may be necessary to strike the end of the hub or the rotor with a deadblow hammer to separate the rotor from the hub.



9. Remove the rotor by slowly turning the rotor while pulling the rotor away from the axle.



10. If the brake rotor cannot be removed perform the following:

10.1.

Assemble J-46277 to J 2619-01 .

10.2.

Insert J-46277 between the rotor friction surfaces in the vent section of the rotor.

DO NOT place the J-46277 on the rotor friction surface.

10.3.

Using J-46277 and J 2619-01 remove the rotor from the hub assembly.

10.4.

Inspect the park brake components for the following conditions:

•	Bent or broken hold down spring

•	Broken, cracked or worn brake shoe lining

•	Bent or damaged brake shoe

•	Worn, bent or damaged backing plate

10.5.

If any of these conditions are found replace the affected parts.

Notice: Whenever the brake rotor has been separated from the wheel bearing flange, clean any rust or foreign material from the mating surface of the rotor and flange with the J 42450 hub cleaning kit. Failure to do this may result in increased lateral runout of the rotor and brake pulsation.

1. Use the J 42450-A to clean all rust and contaminants from the mating surface of the hub flange.
2. Use the J 41013 to clean all rust and contaminants from the inside diameter of the hat section of the brake rotor to prevent any foreign material from getting between the brake rotor and the hub flange.
3. Inspect the mating surfaces of the hub/axle flange and the rotor to ensure that there are no foreign particles or debris remaining.



4. Install the rotor by slowly turning the rotor while pushing the rotor towards the axle.
5. Install the caliper and the bracket as an assembly to the vehicle.
6. Perform the following procedure before installing the caliper bracket mounting bolts.

•	Remove all traces of the original adhesive patch.

•	Clean the threads of the bolt with brake parts cleaner or the equivalent and allow to dry.

•	Apply Threadlocker GM P/N 12345493 or Red LOCTITE™#272 to the threads of the bolt.

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.

7. Install the caliper bracket mounting bolts.

Tighten

•	For the 15 Series, tighten the brake caliper bracket mounting bolts to 175 N·m (129 lb ft).

•	For the 25/35 series, tighten the brake caliper bracket mounting bolts to 300 N·m (221 lb ft).

8. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
9. Lower the vehicle.
10. With the engine OFF, gradually apply the brake pedal to approximately 2/3 of it's travel distance.
11. Slowly release the brake pedal.
12. Wait 15 seconds, then repeat steps 9-10 until a firm pedal is obtained. This will properly seat the brake caliper pistons and brake pads.
13. Fill the master cylinder reservoir to the proper level with clean brake fluid. Refer to Master Cylinder Reservoir Filling in Hydraulic Brakes.

Rear Brake Rotor Replacement Dual Wheels

Notice: Any new rotor must have the protective coating removed from the friction surfaces before being placed in service. Remove the protective coating using denatured alcohol or an equivalent brake cleaner, and wipe the surface clean with clean cloths. Do not use gasoline, kerosene, or other oil base solvents which may leave an oily residue. This residue is damaging to the brake lining and is flammable.

1. Release the park brake.
2. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
3. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
4. Remove the hub and rotor assembly. Refer to Hub and Rotor Assembly Replacement in Rear Drive Axle.
5. Mark the relationship of the hub to the rotor.
6. Place the hub and rotor assembly on a hydraulic press.
7. Press the wheel studs out of the hub and rotor assembly.

1. Align the hub and the rotor (if applicable).
2. Press the wheel studs into the hub and rotor assembly.
3. Install the hub and rotor assembly. Refer to Hub and Rotor Assembly Replacement in Rear Drive Axle.
4. Install the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
5. Lower the vehicle.
6. With the engine OFF, gradually apply the brake pedal to approximately 2/3 of it's travel distance.
7. Slowly release the brake pedal.
8. Wait 15 seconds, then repeat steps 5-6 until a firm pedal is obtained. This will properly seat the brake caliper pistons and brake pads.
9. Fill the master cylinder reservoir to the proper level with clean brake fluid. Refer to Master Cylinder Reservoir Filling in Hydraulic Brakes.