Front brake disc wear and runout check (Range Rover 3)

Examination

1. Raise the front of the car.

WARNING: Do not work under a vehicle raised only on a jack or lift. Always install safety props.

2. Remove the front wheel.



3. Remove the two screws securing the caliper to the wheel bearing support. Remove the caliper from the support and secure to the side.

CAUTION: Do not let the caliper hang on the brake hose.

4. Use a micrometer to measure the thickness of the brake disc at four points. Replace the disc if its thickness or measured values are out of specification. The thickness of the new brake disc is 30 mm. The maximum allowable thickness is 28.4 mm. The maximum spread of values is 0.010 mm.

WARNING: Brake discs should be replaced in pairs, unless one of the new discs requires replacement in less than 1500 km.

5. Mount the dial indicator on tool LRT-99-503 and secure the tool to the inside of the wheel bearing support using the top caliper mounting hole.

6. Move the indicator probe to the disc so that it touches the surface of the disc 5 mm from the outer edge.

7. Replace the wheel and tighten the nuts with a torque of 140 N «m.

8. Set the dial to zero and turn the wheel one full turn. The deviation of the indicator readings should not exceed 0.073 mm.

9. If the measured runout of the brake disc plane is outside the specified value, perform the following procedure.

Adjustment

1. Remove the front wheel.



2. Remove the Allen screw securing the brake disc to the wheel hub flange.


3. Remove the brake disc.

4. Make sure that the mating surfaces of the brake disc and hub flange are clean.

5. Install the brake disc on the hub flange, install the mounting screw and tighten it with a torque of 16 Nm.

6. Reinstall the wheel and tighten the nuts to 140 Nm.

7. Repeat the brake disc runout test above.

8. If the brake disc runout values are again out of limits, replace the brake disc and/or wheel hub.

9. Remove the wheel.

10. Remove indicator with tool LRT-99-503.

11. Install the caliper on the wheel bearing support and tighten the screws with a torque of 110 Nm.

12. Reinstall the wheel and tighten the nuts to 140 Nm.

13. Press the brake pedal several times to get the brake pads in the correct position.

14. Remove props and lower the car.