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Friction Material Deposits

Trouble Shooting Brake Rotor Problems

 Description of the defect: The braking surfaces are completely covered by very dark spots. These spots are due to deposits of pad friction material. This causes overheating which in turn leads to a transformation of the cast iron with the formation of very hard cementite.

Consequences: Onset of vibrations that become progressively worse.

Advice: Only install friction material that is suited to the brake and vehicle.

Friction Material Deposits

Photos Reproduced From: The Brake Disk Manual by Brembo, author Jean-Paul Pompon and coordinating editor Marc Aguettaz


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