2. Before removing the brake disc, make marks with chalk on both sides of the wheel stud at the point of maximum runout.
Fig. 14.11. Installing a pointer-type indicator for measuring axial clearance in a hub bearing
3. Remove the brake disc and install a pointer-type indicator as shown in Fig. 14.11. By moving the hub axially, measure the axial clearance in the hub bearing. If the axial clearance is equal to or greater than the limit value, remove the hub and check the steering knuckle and hub. The maximum permissible value is 0.05 mm.
4. If the axial clearance in the hub bearing does not exceed the limit value, then turn the brake disc 180° relative to the chalk line, install it on the hub and repeat the brake disc runout measurement again.
5. If the operations performed do not eliminate the increased runout of the disc, then it is necessary to replace the brake disc or process it on a special lathe.
