REMOVAL & INSTALLATION
- Raise and safely support the vehicle.
- Remove the wheel and tire assembly.
Remove the 2 anchor bracket bolts and remove the caliper and anchor bracket assembly. Do not disconnect the brake hose from the caliper. Support the caliper with mechanics wire from the coil spring.
WARNINGDo not let the caliper hang by the brake hose.
- Remove the grease cap. Unstake the wheel bearing nut, using a cape chisel. Remove the nut and washer and discard the nut.
- Remove the disc brake rotor. If equipped, remove the anti-lock brake signal ring from the rotor.
- If equipped, install the anti-lock brake signal ring onto the rotor hub.
- Install the rotor on the spindle.
- Install the washer and a new nut. Tighten the nut to 73-131 ft. lbs. (98-178 Nm).
- Stake the nut using a chisel with a rounded cutting edge. If the nut splits or cracks after staking, it must be replaced with a new nut.
- Install the grease cap.
- Install the caliper and anchor bracket assembly. Tighten the anchor bracket bolts to 33-49 ft. lbs. (45-67 Nm).
- Install the wheel and tire assembly. Tighten the lug nuts to 65-87 ft. lbs. (80-118 Nm). Lower the vehicle.
Check the disc brake rotor for scoring, cracks or other damage. Check the minimum thickness, parallelism and rotor runout.
Check the disc brake rotor thickness using a micrometer or calipers. The brake rotor minimum thickness is 0.315 in. (8mm). This is the thickness at which point the rotor becomes unsafe to use and must be discarded. The minimum thickness that the rotor can be machined to is 0.345 in. (8.762mm), as this thickness allows room for rotor wear after it has been machined and returned to service.
Measure the rotor thickness in several places to check parallelism. The thickness variation must not vary more than 0.001 in. (0.025mm). If the thickness variation exceeds specification, machine the rotor if it is not below the minimum thickness specification for machining. If the thickness variation is still excessive after machining, the rotor must be replaced.
Check the rotor for runout using a dial indicator. Mount the dial indicator on the strut and position the indicator foot on the outermost diameter of the contact surface of the disc pads. Make sure there is no wheel bearing free play. Rotor runout must not exceed 0.004 in. (0.1mm). If the rotor runout exceeds specification, machine the rotor if it is not below the minimum thickness specification for machining. If the rotor runout is still excessive after machining, the rotor must be replaced.
The disc brake rotor must be machined while it is bolted to the hub. The rotor and hub are mounted as an assembly on the rotor lathe, and then the rotor is turned. Machining the rotor separately, without the hub, may cause rotor runout.