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Rear Brake Disc Inspection

Runout
  1. Remove the rear wheels.
  1. Inspect the brake disc surface for damage and cracks. Clean the brake disc thoroughly, and remove all rust.
  1. Install suitable flat washers (A) and the wheel nuts (B), and tighten the wheel nuts to the specified torque to hold the brake disc securely against the hub.
  1. Set up the dial gauge against the brake disc as shown, and measure the runout at 10 mm (0.39 in.) from the outer edge of the brake disc.
    Brake disc runout:
    Service limit:
    0.04 mm (0.0016 in.)

  1. If the brake disc is beyond the service limit, refinish the brake disc with a commercially available on-car brake lathe.
    Max. refinishing limit:
    8.0 mm (0.31 in.)

    NOTE:
    • If the brake disc is beyond the service limit for refinishing, replace it.
    • A new brake disc should be refinished if its runout is greater than 0.04 mm (0.0016 in.).
  1. Clean the mating surfaces of the brake disc and the inside of the wheel, then install the rear wheels.

Thickness and Parallelism
  1. Remove the rear wheels.
  1. Using a micrometer, measure the brake disc thickness at eight points, about 45 ° apart and 10 mm (0.39 in.) in from the outer edge of the brake disc. Replace the brake disc if the smallest measurement is less than the max. refinishing limit.
    Brake disc thickness:
    Standard:
    8.9−9.1 mm (0.35−0.36 in.)
    Max. refinishing limit:
    8.0 mm (0.31 in.)
    Brake disc parallelism:  0.015 mm (0.0006 in.) max.

    NOTE: This is the maximum allowable difference between the thickness measurements.
  1. If the brake disc is beyond the service limit for parallelism, refinish the brake disc with a commercially available on-car brake lathe.
    NOTE: If the brake disc is beyond the service limit for refinishing, replace it.
  1. Clean the mating surfaces of the brake disc and the inside of the wheel, then install the rear wheels.