Wheel Hub Rear, Checking

Wheel hub rear, checking

Special tools:
999 5418 Measuring kit 999 5418 Measuring Kit

Note! The illustrations in this service information are used for different model years and/or models. Some variation may occur. However, the essential information in the illustrations is always correct.

Preparatory work

Take out measuring tool kit: 999 5418 Measuring kit 999 5418 Measuring Kit.

Remove:
- the wheel
- the mounting screws for the brake caliper holder. Hang the caliper up with a piece of wire
- the brake disc.

Installation

Installing the bracket




Use the beveled nut and an M8x25mm screw for the lower mounting. Use the M8x25mm wing nut from the kit for the upper mounting.




Install the bracket included in the test equipment.

Measuring lateral run-out




Install the dial gauge in the bracket.
Put the test gauge point against the hub flange as illustrated.
Rotate the hub gently.
Note the test gauge run-out. The maximum lateral run-out of the hub should not exceed 0.020 mm.
If lateral run-out exceeds the value, replace the hub.
To replace the hub, see: Rear wheel hub Rear Wheel Hub Rear wheel hub, AW55-50/51SN Rear Wheel Hub.
To ensure that the maximum value together with the brake disc is not exceeded, install the brake disc with the clamp ring: 999 7104 Clamp ring 999 7104 Clamp Ring from the measuring tool kit: 999 5418 Measuring kit 999 5418 Measuring Kit on the hub with wheel nuts. Ensure that mating surfaces on the hub, brake disc and clamp ring are clean. Tighten the studs lightly. Then tighten the screws crosswise. Tighten to 90 Nm. When tightening using an impact wrench, use torque socket: 981 4031 Torque socket 19 mm 981 4031 Torque Socket 19 mm. Position the tip of the dial gauge against the brake disc, rotate the disc slowly and read off the value.
The value must not exceed 0.050 mm.

Finishing

Remove the test equipment.

Install:
- the brake disc
- the brake caliper and the caliper holder. Tighten. See: Tightening torque Tightening Torque.

Note! Use new mounting screws.

Install the wheel according to Wheels Service and Repair.