Brake Rotor/Disc: Service and Repair

Brake Disc, Inspecting for Corrosion

CAUTION!
The secure seating of the wheel bolts and the wheels is only ensured if the instructions and checks below are followed.

- Make sure the contact surfaces - arrows - on the brake disc are free from corrosion and dirt.





- Make sure the contact surfaces - arrow - on the brake disc center seat are free of corrosion and dirt.





- Make sure the contact surface - arrow - on the wheel inner side (rim) as well as the central seat in the rim is free of corrosion and dirt.





- The spherical caps * in the wheel bolt openings and the wheel bolt threads must likewise be free of corrosion, dirt, oil or grease.

* The spherical cap is the curved surface of a section of a sphere.

- Check whether the wheel bolts can be easily screwed in by hand. The threads of the wheel bolts must not touch the holes in the brake disc - arrow -.





If the thread of the wheel bolt touches the hole - arrow -, turn the brake disc relative to the wheel accordingly.

If necessary, clean any dirt and corrosion, oil or grease off the surfaces and thread in the wheel hub and/or wheel bolts.

CAUTION!
Heavily corroded, difficult to turn or damaged wheel bolts must be replaced.