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BRAKE ROTOR THICKNESS AND RUNOUT Any servicing of the rotor requires extreme care to maintain the rotor within service tolerances to Before refinishing or refacing a rotor, the disc should be checked and inspected for the following Braking surface scoring, rust, impregnation of lin- ing material and worn ridges. Excessive lateral runout or wobble. time, the rotor surface will rust in the area not cov- Excessive wear and scoring of the rotor can cause temporary improper lining contact if ridges are not Some discoloration or wear of the rotor surface is normal and does not require resurfacing when lin- Excessive runout or wobble in a rotor can increase pedal travel due to piston knock back. This will Thickness variation in a rotor can also result in pedal pulsation, chatter and surge due to variation in Dishing or distortion can be caused by extreme heat and abuse of the brakes. ROTOR RUNOUT AND THICKNESS VARIATION On vehicle rotor runout is the combination of the individual runout of the hub face and the runout of If runout is in excess of the specification, check the lateral runout of the hub face. Before removing VEHICLE ROAD TEST 5 - 14 BRAKES 300M DIAGNOSIS AND TESTING (Continued) |