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Wear assessment by weighing brake disc > < Assessment of wear on ceramic brake discs

A4 Mk2

Wear assessment by checking thickness of brake disc
Wear assessment by checking thickness of brake disc
On these models (8E and 8H), ceramic brakes are fitted only at the front.
Special tools and workshop equipment required
t  Use a commercially available caliper gauge or micrometer gauge.
The minimum permissible thickness of the brake disc is engraved as “min.Th.” on the disc brake hub.
   
–  Measure the brake disc thickness at three points on the periphery next to the individual wear indicators. -x-
  Note
If the thickness is x =min. Th. + 0.2 mm, additionally check the wear of the brake disc by weighing the brake disc → Chapter.
If the thickness of the brake disc is less than or equal to the minimum permissible thickness “min.Th.”, do NOT continue using the brake disc. The brake disc must be renewed.
In this case, always renew the brake discs on both sides of the axle.
When doing so, always renew the brake pads on both sides of the axle.
  A00-10368

Wear assessment by weighing brake disc > < Assessment of wear on ceramic brake discs