Audi A8 2003 Workshop Manual page 16

Audi A8 2003 ➤
Brake system - Edition 03.2013
Note
Depending on the version, the minimum permissible weight for a
used brake disc is stamped on the brake disc hub. The disc must
be renewed when the weight of the disc is less than or equal to
the indicated minimum weight. Always renew brake discs on both
sides of the axle.
Caution
If the minimum permissible weight of the disc is indicated on
the hub of the disc ("min. weight"), the disc must be additionally
weighed to assess the amount of wear. The disc must be re‐
newed when the weight of the disc is less than or equal to the
indicated minimum weight.
Brake disc with minimum weight stamped on hub:
1. Wear assessment by checking thickness of brake disc (if
minimum weight is stamped on hub)
Thickness of brake discs in permissible range → brake disc OK
Brake disc thickness in critical
range min. Th + 0.05 mm
↓↓
Further wear assessment ac‐
cording to wear indicators
↓↓
2. Wear assessment according to wear indicators
None of the six wear indicators fully worn out → brake disc OK
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Always renew brake discs on both sides of axle if:
♦ the brake discs have to be renewed because of wear.
♦ there has been a technical modification to the replacement
brake disc (indicated by changed part number).
10
Rep. gr.00 - Technical data
⇒ page 11
Value at or below limit
↓↓
Renew brake disc
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⇒ page 11
One of the six wear indicators
fully worn out
↓↓
Weigh brake disc
Minimum weight not reached
↓↓
Brake disc OK
Minimum weight reached
↓↓
Renew brake disc
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with respect to the correctness of information in this document. Copyright by AUDI AG.
⇒ page 13