Rotor Service

FIGURE 22:

Rotor Machining

The rear disc brake rotors can be sanded and/or machined to restore surface flatness and finish. However, the rotors should be replaced if the braking surfaces are severely worn, scored, tapered, or out of tolerance.

The minimum allowable thickness for the rear disc brake rotor is indicated on the reverse side of the rotor (Fig. 22). The minimum allowable thickness is 9.5 mm (.374 in.). Replace the rotor if worn below this limit or if machining would take the rotor below the stated limit.
The maximum allowable lateral runout for rear rotor is .08 mm (.003 in.) Replace the rotors if runout exceeds this limit.

FIGURE 12:

Rotor Removal

(1) Raise the vehicle and remove the rear wheel.

(2) Remove the two slide pins attaching the caliper to the axle shaft.

(3) Lift the caliper up and off the rotor. Secure the caliper to the axle shaft with wire. Do not allow the brake hose to support caliper weight.

(4) Remove the rotor retainers.

(5) Remove the rotor from the axle hub (Fig. 12).

Rotor Replacement

If a new rotor is to be installed, the caliper piston must be reseated (bottomed) in the bore to accommodate the new rotor.

Remove the brake pads and reseat the piston only as described in the Brake Shoe Installation procedure.

FIGURE 2:

Rotor Installation

(1) Position the rotor on the axle hub studs.

(2) Install the rotor retainers (Fig. 2).
(3) Install the caliper over the rotor.

(4) Install the caliper slide pins. Tighten the small diameter pin to 28 N-m (21 ft.lbs.) torque and the larger diameter pin to 48 N-m (36 ft.lbs.) torque.

(5) Install the wheel and lower the vehicle.

(6) Apply the brakes several times to seat the caliper piston.