Backing Plate: Service and Repair

BRAKE BACKING PLATE

REMOVAL

CAUTION: MAKE SURE VEHICLE IS PROPERLY SUPPORTED AND SQUARELY POSITIONED ON THE HOIST. TO HELP AVOID PERSONAL INJURY WHEN A VEHICLE IS ON A HOIST, PROVIDE ADDITIONAL SUPPORT FOR THE VEHICLE ON THE OPPOSITE END FROM WHICH COMPONENTS ARE BEING REMOVED.

1. Raise vehicle on hoist.
2. Remove rear wheel and tire assembly.
3. Disassemble rear drum brakes.





4. Disconnect rear brake pipe from wheel cylinder. Plug open brake pipes to prevent brake fluid loss and contamination.





5. Remove wheel cylinder screw and wheel cylinder.





6. Remove park brake cable.





7. Remove hub-to-knuckle nuts, hub and backing plate from knuckle.

INSTALLATION

NOTICE: Use new nuts. Torque retention of old nuts may not be sufficient.

1. Position hub assembly and backing plate to knuckle and tighten using new nuts.
Torque:
Rear Hub Assembly-to-Knuckle Nuts: 50 Nm (37 ft. lbs.) + 30° to 45°





2. Install parking brake cable.





3. Install wheel cylinder and fastener.
Torque:
Wheel Cylinder-to-Backing Plate Bolt: 9 Nm (80 inch lbs.)





4. Install brake pipe onto wheel cylinder.
Torque:
Brake Pipe-to-Rear Wheel Cylinder: 16 Nm (12 ft. lbs.)
5. Completely assemble rear drum brakes.

NOTICE: Before installing wheels, remove rust or corrosion from wheel mounting surfaces and brake rotors. Failure to do so can cause wheel bolts to loosen in service.

6. Position wheel and tire assembly onto hub.
7. Install wheel bolts and tighten in a crisscross pattern.
7.1 Hand tighten all five wheel bolts.
7.2 Use a torque wrench to tighten wheel bolts using a crisscross pattern.
Torque:
Wheel Bolts (Initial Torque): 63 Nm (46 ft. lbs.)
7.3 Use a torque wrench to final tighten wheel bolts using a crisscross pattern.
Torque:
Wheel Bolts (Final Torque): 125 Nm (92 ft. lbs.)
8. Lower vehicle from host.
9. Bleed brakes.