Parking Brake Shoe: Service and Repair

PARKING BRAKE SHOE

Components:

Removal and Installation
REMOVAL

CAUTION: Clean dust on disc rotor and back plate using a vacuum dust collector. Do not blow with compressed air. Put matching marks on both disc rotor and wheel hub when removing disc rotor.

1. Remove rear tires from vehicle with power tool.
2. Remove disc rotor with parking brake pedal completely in the released position.
3. If disc rotor cannot be removed, remove as follows:
a. Secure the disc rotor in place with wheel nuts and remove adjuster hole plug.





b. Using a flat-bladed screwdriver, rotate adjuster in direction B to retract and loosen brake shoe.
4. Remove anti-rattle pins, retainers, anti-rattle springs, and return springs.
5. Remove parking brake shoes, adjuster assembly, and toggle lever.
6. About the removal of back plate, refer to RAX-9, Disassembly and Assembly. Disassembly and Assembly

INSPECTION AFTER REMOVAL
Lining Thickness Inspection





^ Check thickness of lining.
Standard thickness (new) A: 3.2 mm (0.126 inch)
Repair limit thickness A: 1.5 mm (0.059 inch)

Drum Inner Diameter Inspection





^ Check inner diameter of drum.
Standard inner diameter (new): 172 mm (6.77 inch) dia.
Maximum inner diameter: 173 mm (6.81 inch) dia.

Other Inspections
^ Check the following:
^ Lining for excessive wear, damage, and peeling.
^ Shoe sliding surface for excessive wear and damage.
^ Anti-rattle pin for excessive wear and corrosion.
^ Return spring for sagging.
^ Make sure that adjuster moves smoothly
^ Visually check the inside of drum for excessive wear, cracks, and damage. Check the inside of drum using a pair of vernier calipers.
^ Replace with new part if the above part is malfunction.

INSTALLATION
Note the following, and install in the reverse order of removal.





^ Refer to Components and apply PBC (Poly Butyl Cuprysil) grease or equivalent to the specified points during assembly.
^ Assemble adjusters so that threaded part is expanded when rotating it in the direction shown by arrow.
^ Shorten adjuster by rotating it.
^ Check shoe sliding surface and drum inner surface for grease. Wipe it off if it adhere on the surfaces.
^ Perform break-in operation as follows after replacing brake shoes or disc rotors, or if brakes do not function well.

1. Adjust parking brake pedal stroke to the specified amount.
2. Perform parking brake break-in (drag run) operation by driving vehicle under the following conditions:
Drive forward
^ Vehicle speed: Approximately 40 km/h (25 MPH) set (constant and forward)
^ Parking brake operating force: Approximately 400 N (40 kg, 88 lb) set constant
^ Time: Approximately 10 sec.
3. Check parking brake pedal stroke of parking brake. Adjust again if it is outside the standard.