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Home >> Land Rover >> 2012 >> LR4 HSE Lux >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Brake System - General Information >> Brake System - General Information >> General Procedures >> Rear Brake Disc RUNOUT Check

Rear Brake Disc RUNOUT Check

NOTE: Some variation in the illustrations may occur, but the essential information is always correct.
NOTE: RH illustration shown, LH is similar.
NOTE: It is not necessary to carry out the parking brake shoe 'bedding-in procedure' if the rear brake discs or parking brake shoes have been removed for access to other components.
    CAUTION: Do not turn the ignition on when the parking brake service mode has been set, this will result in the parking brake being released from the service mode.
  1. Enter the parking brake into the service mode.
    • Turn the ignition on.
    • Apply, and hold, the footbrake.
    • Apply, and hold, the parking brake switch to the RELEASE position.
    • Turn the ignition off.
    • Release the footbrake.
    • Release the parking brake switch.
    2. WARNING: Make sure to support the vehicle with axle stands.
  2. Raise rear of vehicle.
  3. Remove road wheel.
    4. CAUTION: The brake pad wear indicator sensor is easily damaged. Do not use a lever to remove the sensor. Use fingers only.
  4. RH side rear only: Disconnect the brake pad wear indicator sensor lead.
    GJ0013167
  5. Remove 2 bolts securing brake caliper to hub. Release caliper from hub and tie aside.
    GJ0013164
    6. NOTE: Some variation in the illustrations may occur, but the essential information is always correct.
  6. At 4 points around the disc, measure disc thickness using a micrometer; renew disc if less than service limit or if variation is exceeded: Disc thickness, NEW = 20 mm Service limit = 18 mm. Thickness variation maximum = 0.01 mm.
    GJ0013530
    7. NOTE: Some variation in the illustrations may occur, but the essential information is always correct.
  7. Mount a Dial Test Indicator (DTI) to and secure to inboard side of hub using caliper assembly upper bolt hole.
    GJ0013531
  8. Position DTI probe 5 mm in from outer edge of disc.
    9. NOTE: Some variation in the illustrations may occur, but the essential information is always correct.
  9. Tighten the wheel nuts to 140 Nm (103 lb.ft).
    • Install spacer washers under the wheel nuts.
    GJ0013532
  10. Zero DTI and rotate wheel one complete revolution to measure disc runout. Disc runout must not exceed 0.09 mm (0.003 in).
  11. If disc runout is outside limits:
  12. Remove the wheel hub nuts.
    • Remove the spacer washers.
  13. Remove Allen screw securing brake disc to drive flange.
  14. Remove brake disc.
  15. Ensure mating surfaces of disc and drive flange are clean.
  16. Install the brake disc.
    • Tighten the Torx screw to 35 Nm (26 lb.ft).
  17. Tighten the wheel nuts to 140 Nm (103 lb.ft).
    • Install spacer washers under the wheel nuts.
  18. Check disc runout as detailed above.
  19. If runout is still outside limits, renew disc and/or hub.
  20. Remove the wheel hub nuts.
    • Remove the spacer washers.
  21. Remove the DTI.
  22. Install the brake caliper anchor bolts
    • Tighten the bolts to 115 Nm (85 lb.ft).
    GJ0013164
  23. Tighten the wheel nuts to 140 Nm (103 lb.ft).
  24. Depress brake pedal several times to set brake pads.
  25. Remove stands and lower vehicle.
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