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Calling brake gurus -re-bedding front rotors? 900

posted by  B.B. on  Thu Aug 31 16:31 CST 2023
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last visit: Mon Oct 6 13:15 CST 2014
[RELATED]

Hi Phil,

You can find plenty of faulty brake installation directions by the
major auto parts chains and others that generally omit critical details
such as cleaning hubs and checking run-out and breaking in pads.

Here's some technical excerpts from Zimmermann's terrific website:

https://www.otto-zimmermann.de/en/products/messeinrichtung-fuer-bremsscheiben/

Testing Unit for Brake Discs

Run out can also be generated by incorrect assembly. If the wheel hub is not metallically bright during assembly or if grease paste was used during assembly, steering wheel flutter and / or a pulsating brake pedal may occur after approx. 1,500 - 5,000 km service life.

https://www.otto-zimmermann.de/en/service/faq/
11. Run-in notices

The following run-in notices are recommended to ensure a safe and proper operation of the brake disc / brake pad system:

Perform the run-in processes on road sections that allow for the following maneuvers to be carried out safely and within the provisions of road traffic regulations (StVO).

Violent or shock-braking should be avoided during the first 300 km of travel after the change of the brake discs.

When running-in Coat Z coated brake discs, kindly perform approximately 5-10 short and moderate braking operations for braking off the coating layer.
After that kindly ensure a bedding-in process of brake discs and brake pads. This process causes that the brake disc heats up gradually and serves to adapt the friction surfaces of the brake disc
and brake pad.

If the road conditions permit, perform several short, moderate braking actions (without ABS intervention) within the first 300km.

Failure to observe the recommended running-in procedure may result in impairment of the brake function and worse braking performance.

See the Videos, a wealth of technical details:
https://www.otto-zimmermann.de/en/service/tutorials/

Cheers, Bill






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