Thickness And Run-Out Check-Front Brake Disc - MG MG6 Series 2011 Service Manual

Brake System

Thickness and Run-Out Check-Front Brake Disc

Check
1. Raise the vehicle on a lift.
Warning: Do not work on or under a vehicle supported
only by a jack. Always support the vehicle on safety
stands.
2. Remove road wheel.
3. Remove 2 bolts securing caliper carrier to hub, release
caliper carrier from hub and tie aside.
Caution: Do not tie brake caliper on brake hose.
4. Using a micrometer, measure the thickness of disc
at 4 equally spaced points around disc, 10 mm from
outer edge of disc. Disc thickness must be 20.0 mm
minimum; Renew disc if outside limit(s).
Caution: Brake discs must be renewed in pairs, unless one
disc requires changing before 1000 miles (1500 km) from
new.
5. Mount a Dial Test Indicator (DTI) toTCH00022 and
secureTCH00022 to inboard side of hub using caliper
assembly bolt hole.
Version 2.0
6. Position DTI probe 5 mm from outside edge of disc.
7. Fit wheel.
Wheel Wheel Wheel Refit Refit Refit
8. Zero DTI and rotate wheel one complete turn to
measure disk runout. Disc runout must not exceed
0.06 mm.
9. If disc runout is outside limits:
a. Remove wheel.
b. Remove countersunk screw securing brake disc to
hub and remove disc.
c. Ensure disc to hub flange mounting faces are clean.
d. Fit disc to hub and tighten countersunk screw and
tighten to 30–36Nm.
e. Fit wheel.
Wheel Refit Refit
Wheel Wheel Refit
f. Check disc run-out again as detailed.
g. If run-out is still outside limits, renew disc and/or hub.
10. Remove wheel.
Wheel Wheel Wheel Remove Remove Remove
11. Remove DTI andTCH00022 from inboard side of hub.
12. Fit caliper assembly to hub, fit and tighten bolts to
90–110Nm.
13. Fit wheel.
Wheel Wheel Wheel Refit Refit Refit
14. Press brake pedal several times to seat brake pads.
15. Lower the vehicle.
Brake
616