Disc Removal and Installation, Front

Brake Disc

Material:

Removal and Installation

1. WARNING: If the vehicle is equipped with air suspension, the electrical power to the air suspension system must be shut off prior to hoisting, jacking or towing an air suspension vehicle. This can be accomplished by turning off the air suspension switch located in the luggage compartment. Failure to do so can result in unexpected inflation or deflation of the air springs, which can result in shifting of the vehicle during these operations. Failure to follow these instructions may result in personal injury.

If equipped, turn the air suspension service switch to the OFF position.

2. WARNING: If equipped with fire suppression system, depower the system. For important safety warnings and procedures, refer to Fire Suppression System.

With the vehicle in NEUTRAL, position it on a hoist.

3. CAUTION: Do not allow the brake caliper, brake pads and anchor plate assembly to hang from the brake hose or damage to the hose can occur.

Remove the 2 brake caliper anchor plate bolts and position the brake caliper, brake pads and anchor plate aside as an assembly.
^ Support the brake caliper, brake pads and anchor plate assembly using mechanic's wire.
^ To install, tighten to 160 Nm (118 ft. lbs.).
4. Match-mark the brake disc with a wheel stud.
^ This will make sure the lowest brake disc runout is maintained during reassembly.

5. NOTE: If the brake disc cannot be removed easily, apply rust penetrant on brake disc to wheel hub mating surfaces.

Remove the retention ring and the brake disc.
^ Discard the retention ring.

6. NOTE: Install a new retention ring.

To install, reverse the removal procedure.
^ Clean any rust or foreign material from the brake disc, wheel and wheel hub.
^ Use brake parts cleaner to clean the brake disc and hub surfaces.
^ Apply anti-seize lubricant to the hub mounting surface to prevent future corrosion.

7. WARNING: If equipped with fire suppression system, repower the system. For important safety warnings and procedures, refer to Fire Suppression System.

If equipped with fire suppression system, repower the system.