Parking Brake Shoe: Service and Repair

PARKING BRAKE SHOE

Removal and Installation

Exploded View PB-6:

REMOVAL

WARNING: Clean the brakes with a vacuum dust collector to minimize the hazard of airborne particles or other materials.

NOTE: Remove the disc rotor only with the parking brake pedal completely disengaged.

1. Remove wheel hub and bearing assembly.
^ Disconnect the wheel sensor at the harness connector. It is not necessary to remove the wheel sensor from the wheel hub and bearing assembly.
2. Remove the return springs.
3. Remove the adjuster.
4. Remove the retainers, anti-rattle pins and shoes.
5. Disconnect the rear cable from the toggle lever.
6. Remove the back plate.

INSPECTION AFTER REMOVAL
Lining Thickness Inspection





^ Check thickness of lining.
Standard thickness "A": 5.15 ± 0.25 mm (0.203 ± 0.010 in)
Wear limit thickness "A": 0.5 mm (0.020 in)

Drum Inner Diameter Inspection





^ Check drum inner diameter.
Standard inner diameter: 205 ± 0.13 mm (8.07 ± 0.01 in)
Wear limit of inner diameter: 205.7 mm (8.10 in)

Other Inspections
^ Check shoe sliding surface for excessive wear and damage.
^ Check anti-rattle pins for excessive wear and corrosion.
^ Check return springs for sagging.
^ Check adjuster for rough operation.
^ When disassembling adjuster, apply PBC (Poly Butyl Cuprysil) grease or equivalent to the adjuster threads.
^ Check either visually or with a vernier caliper to see if there is any excessive wear, cracks, or damage inside drum.

INSTALLATION
Installation is in the reverse order of removal.
^ Apply brake grease to the specified points during assembly.





^ Install adjuster so that threaded part expands when rotating it in the direction shown by the arrow.
^ Shorten adjuster by rotating it in the opposite direction as shown by the arrow.

NOTE: After replacing brake shoes or disc rotors, or if parking brake does not function well, perform break-in operation as follows.

1. Adjust parking brake pedal stroke.
2. Perform parking brake burnishing operation by driving the vehicle forward under the following conditions:
^ Vehicle speed 40 km/h (25 mph) set (forward)
^ Parking brake operating force 196 N (20.0 kg-f, 44.1 lb-f) set
^ Apply time 30 sec.

CAUTION:
^ To prevent lining from getting too hot, allow a cool off period of approximately 5 minutes after every break-in operation.
^ Do not perform excessive break-in operations, because it may cause uneven or early wear of lining.

3. After burnishing operation, check parking brake pedal stroke. Readjust if it is now longer than the specified stroke.