Rear
Rear Brake Disc InspectionRunout
1. Raise the rear of the vehicle, and support it with safety stands in the proper locations. Remove the rear wheels.
2. Remove the brake pads.
3. Inspect the brake disc surface for damage and cracks. Clean the brake disc thoroughly, and remove all rust.
4. Use wheel nuts and suitable flat washers (A) to hold the brake disc securely against the hub, then mount a dial indicator (B) as shown, and measure the runout at 10 mm (3/8 inch) from the outer edge of the brake disc.
5. If the disc is beyond the service limit, refinish the brake disc with an on-car brake lathe. The Kwik-Lathe produced by Kwik-way Manufacturing Co. and the "Front Brake Disc Lathe" offered by Snap-on Tools Co. are approved for this operation.
Max. refinishing limit: 7.5 mm (0.30 inch)
NOTE: A new brake disc should be refinished if its runout is greater then 0.10 mm (0.004 inch).
Thickness and parallelism
1. Raise the vehicle and support it with safety stands in the proper locations. Remove the rear wheels.
2. Remove the brake pads.
3. Using a micrometer (A), measure brake disc thickness at eight points, approximately 45° apart and 10 mm (3/8 inch) in from the outer edge of the brake disc.
Brake disc thickness:
Standard: 8.9 - 9.1 mm (0.350 - 0.358 inch)
Max. refinishing limit: 7.5 mm (0.30 inch)
Brake disc parallelism: 0.015 mm (0.0006 inch) max.
NOTE: This is the maximum allowable difference between the thickness measurements.
4. If the smallest measurement is less than the max refinishing limit, replace the brake disc.
5. If the brake disc is beyond the service limit for parallelism, refinish the brake disc with an on-car brake lathe. The Kwik-Lathe produced by Kwik-way Manufacturing Co. and the "Front Brake Disc Lathe"offered by Snap-on Tools Co. are approved for this operation.