Panamera S (970) V8-4.8L (2010)
PCCB friction surface damage
The best way to detect a surface fracture is by checking the wear indicators. Based on the wear indicators, this means that at least one wear
indicator -arrow- must have a surface fracture of > 50% (damage > 1 cm2/entire surface of a wear indicator with a surface area of 1 cm2).
PCCB surface burnout on wear indicator
Evaluation of surface roughness Rk (max. 80 micrometers permitted)
Information
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An increase in surface roughness impairs smoothness of braking (rubbing, shaking in steering wheel, scraping noises) and increases brake pad
wear.
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With a roughness (Rk) value of > 80 microns (> 80 micrometers), a precautionary parts replacement is required.
The assessment is carried out visually, based on the diagram. Two illustrations of the same peak-to valley surface roughness (views 1 and 2) help to
make a better assessment.
1. Brake discs that are OK:
PCCB surface roughness (Rk) = 6 micrometers (view 1)
1.1.
Surface roughness Rk = 6 microns -see illustration- (view 1)