Front Disc Brake
FRONT DISC BRAKE ROTOR CHECKCaution: To maintain safe braking performance, the disc brake rotors must be kept within allowable service specifications.
Before re-finishing or re-processing the brake disc surface, the conditions shown in the provided chart should be checked.
FRONT BRAKE DISC RUN-OUT CHECK
1. Remove the caliper support bolts, then raise the caliper assembly upward and secure by using wire.
2. Inspect the disc surface for grooves, cracks, and rust. Clean the disc thoroughly and remove all rust.
3. Place a dial gauge approximately 5 mm (0.2 inch) from the outer circumference of the brake disc, and measure the runout of the disc
Limit: 0.08 mm (0.0031 inch)
NOTE: Tighten the nuts in order to secure the disc to the hub.
FRONT BRAKE DISC THICKNESS CHECK
1. Using a micrometer, measure disc thickness at eight positions, approximately 45° apart and 10 mm (0.39 inch) in from the outer edge of the disc.
Brake disc thickness
Standard value: 24 mm (0.94 inch)
Limit: 22.4 mm (0.88 inch)
Thickness variation (at least 8 positions)
The difference between any thickness measurements should not be more than 0.015 mm (0.0006 inch).
2. If the disc is beyond the limits for thickness, remove it and install a new one. If thickness variation exceeds the specification, replace the brake disc or turn rotor with an on the car type brake lathe ("Accuturn-8750" or equivalent). Be sure to follow the exact brake lathe manufacturer instructions.