Brake Rotor/Disc: Testing and Inspection

Brake Disc Runout Check





Special Tool(s)

Check
1. Remove the wheel and tire.
2. Detach the caliper and anchor plate assembly.
3. Reverse and install the wheel nuts to hold the brake disc in place.
4. Install a dial indicator gauge and holding fixture to the suspension unit.





5. NOTE: If the runout is outside specification, check the hub face runout.

Using the special tool, measure the inner and outer faces of the disc.
1 Position the gauge so that it contacts the disc 10 mm (0.4 inch) from the outer edge.
2 Slowly rotate the hub/disc assembly. The total dial reading should not exceed 0.075 mm (0.003 inch).
6. Remove the brake disc.





7. Using the special tool, check the hub face runout.
^ Slowly rotate the hub and check the runout. If the runout exceeds 0.05 mm (0.002 inch) install a new hub and recheck.
8. If the hub face runout is within specification install a new disc and recheck disc runout.