Determining Wear

• The following applies when using the Carbon-Ceramic Brake Wear Tester :VAS6813  to determine wear:
• This is a new test procedure to determine the wear limit of the ceramic brake rotors.
• The wear indicators on the brake rotor are no longer present.
• The brake rotor must not be weighed again.

The Brake Rotor Can Be Identified by the Following Points:

• The wear indicators -arrow- on the friction surface of the brake rotor are no longer present

  Courtesy of AUDI OF AMERICA, LLC

• At the printed marks -A through D-
  Fig 1: Wear Indicator A Through D

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• The wear is determined by determining the brake rotor thickness "and" the wear value with the Carbon-Ceramic Brake Wear Tester:VAS6813  ; both must be measured three times respectively around the circumference.
• On the brake rotor cup the permitted minimum thickness "min.th" of the brake rotor is engraved.
• The brake rotor wear value -C- is engraved on the brake rotor cup for the Carbon-Ceramic Brake Wear Tester:VAS6813  .
• Value -A- is a value from the production of the new brake rotor
• The values -A and C- can be different depending on the location.
• The values -A and C- can be different depending on the brake rotor.

Example of minimum thickness: -3-, brake rotor thickness. It must not fall short of this value.

Fig 2: Identifying Ceramic Brake Rotor Data

Courtesy of AUDI OF AMERICA, LLC

TIP:

Depending on the brake rotor, the value -3- may be different.