Front Brake Disc Runout Check

Front Brake Disc Runout Check

NOTE:
Some variation in the illustrations may occur, but the essential information is always correct.

NOTE:
LH illustration shown, RH is similar.
1
WARNING: Make sure to support the vehicle with axle stands.
Raise the front of the vehicle.
2 Remove the road wheel.




3
CAUTION: Do not allow the brake caliper to hang on the brake hose.
Release the brake caliper and tie aside.




4
CAUTION: Brake discs must be renewed in pairs, unless one disc requires changing before 1000 miles (1600 kilometers) from new.
At 4 points around disc, measure disc thickness using a micrometer; renew disc if less than service limit or if variation is exceeded: Disc thickness, NEW 30 mm, Service limit = 27 mm. Thickness variation maximum = 0.01.




5 Mount a Dial Test Indicator (DTI) to and secure to inboard side of hub using caliper assembly upper bolt hole
6 Position DTI probe 5 mm in from outer edge of disc.




7 Install spacer washers under the wheel nuts.
- Tighten the road wheel nuts to 140 Nm (103 lb.ft).
8 Zero DTI and rotate road wheel one complete revolution to measure disc runout. Disc runout must not exceed 0.05 mm (0.002 in).
9 If disc runout is outside limits:

10 Remove the wheel hub nuts.
- Remove the spacers.

11 Remove Allen screw securing brake disc to drive flange.

12 Remove the brake disc.

13 Ensure mating surfaces of disc and drive flange are clean.

14 Install the brake disc.
- Tighten the Torx screw to 35 Nm (26 lb.ft).

15 Install spacer washers under the wheel nuts.
- Tighten the road wheel nuts to 140 Nm (103 lb.ft).

16 Check disc runout as detailed above.

17 If runout is still outside limits, renew disc and/or hub.

18 Remove the wheel hub nuts.
- Remove the spacers.

19 Remove the DTI.

20 Install the brake caliper and tighten the bolts. TORQUE: 275 Nm

21 Install the road wheel(s) and tighten nuts to 140 Nm (103 lb-ft).

22 Depress brake pedal several times to set brake pads.

23 Lower the vehicle.