Quote:
Originally Posted by evanevery
... Also, The wear indicators are NOT a particularly gtood method to determine rotor wear. In fact, the CCB docs state that the wear indicators are used to simply indicate when it is time to remove the rotor and actually weigh it. They are only visual wear indicators and NOT the final deciding factor. ...
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I'd agree with that. The Mercedes/AMG technical docs (WIS) specify a process that uses the wear-indicator circles to evaluate CCB wear ... and it's rubbish! It involves using a clear overlay plastic tool that "masks out" squares and you're to photograph the setup then count the squares where "light points" are a percentage of the square's area and produce a number which then dictates whether the CCB rotor is to be replaced.
The problem is that there's no clear definition of what delineates a "light point" and the photo results vary widely based upon lighting, camera angle, whether the rotors have been properly burnished (bed-in), etc. The whole thing ends up being more subjective than deterministic ... which will result in actions that are either overly costly or dangerous for the customer.
For such a fundamental safety item, it's amazing that the only (seemingly) definitive wear-measurement tool that's not prohibitively labor intensive is the Carboteq tool.