REMOVAL & INSTALLATION
- Raise and safely support the vehicle.
- Remove the wheel and tire assembly.
- Disconnect the caliper from the caliper bracket. Support the caliper out of the way with a length of wire. Do not allow the caliper to hang from the brake hose.
- Remove the caliper bracket.
- Remove the two 6mm screws and the brake disc. If the brake disc is difficult to remove, install two 8mm bolts into the threaded holes and tighten them evenly to prevent cocking the rotor.
- Install the rotor in position. Install the two 6mm retaining screws.
- Install the brake caliper. Install the tire and wheel assembly.
See Figures 1 and 2
- The brake disc develops circular scores after long or even short usage when there is frequent braking. Excessive scoring not only causes a squealing brake, but also shortens the service life of the brake pads. However, light scoring of the disc surface, not exceeding 0.0152 in. (0.38mm) in depth, will result from normal use and is not detrimental to brake operation.
Differences in the left and right disc surfaces can result in uneven braking.
- Disc runout is the movement of the disc from side-to-side. Position a dial indicator in the middle of the pad wear area and turn the disc, while checking the indicator. If disc runout exceeds 0.006 in. (0.15mm), replace the disc.
- Disc parallelism is the measurement of variations in disc thickness at several locations on the disc circumference. To measure parallelism, place a mark on the disc and measure the disc thickness with a micrometer. Repeat this measurement at eight (8) equal increments on the circumference of the disc. If the measurements vary more than 0.0006 in. (0.015mm), replace the disc.
Only the outer portion of the disc can be checked while installed on the vehicle. If the installed parallelism check is within specifications but you have reason to suspect that imperfect parallelism is the problem, remove the disc and repeat the check using the center of pad wear for a checking point.