Run - out exceeds limit (Brakes)

12. Mount a dial test indicator to caliper lower mounting bolt using tool 18G 191-9.
13. Position dial test indicator probe 6 mm from disc outer edge.
14. Rotate disc at least one complete turn and measure disc run - out.

Front disc run - out limit with wheel off = 0.050 mm.

Run - out exceeds limit

15. Mark disc to drive flange relationship, remove 4 x M12 nuts retaining disc and remove disc from drive flange. Check mating surfaces again for contaminants then refit disc 180° from previous position and secure with nuts. Recheck run - out.
16. If run - out is still excessive, skim brake discs using an on car disc lathe.
17. If a lathe is not available, fit new drive flange and/or bearings.

Run - out within limit

18. Remove dial test indicator and tool 18G 191-9. Remove 4 x M12 nuts and secure disc with the new screws tightened to 6 Nm.
19. Wipe pads and shims clean.
20. Fit shims to pads.
21. Position brake pads and locate caliper assembly to disc.
22. Fit lower guide pin bolt and tighten to 32 Nm.
23. Inspect wheel and disc mating surfaces and remove any contaminants.
24. Fit road wheel and tighten nuts to 100 Nm.

25. Mount a dial test indicator to caliper lower mounting hole using tool 18G 191-9.
26. Position dial test indicator probe 6 mm from disc outer edge.
27. Rotate disc at least one complete and measure disc run - out.

Front disc run - out limit with wheel on = 0.060 mm.

Run - out exceeds limit

28. Mark wheel to stud relationship. Remove wheel, again check mating surfaces for contaminants, then refit wheel 90° from previous position and recheck run - out.
29. If run - out is still excessive, move wheel through a further 90° and recheck run - out.
30. If run - out is still excessive, fit a new road wheel.

Run - out within limit

31. Remove dial test indicator and tool 18G 191-9.
32. Fit caliper lower mounting bolt and tighten to 80 Nm.
33. Remove stand(s) and lower vehicle.