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BRAKE DISC (ROTOR) INDEX page page Braking Disc Removal . . . . . . . . . . . . . . . . . . . . . 54 General Information . . . . . . . . . . . . . . . . . . . . . . . 53 Inspection Diagnosis . . . . . . . . . . . . . . . . . . . . . . 53 Installing Braking Disc . . . . . . . . . . . . . . . . . . . . . 54 Refinishing Braking Disc . . . . . . . . . . . . . . . . . . . 55 Service Procedures . . . . . . . . . . . . . . . . . . . . . . . 53 GENERAL INFORMATION Any servicing of the braking disc requires extreme care to maintain the braking disc within service toler- CAUTION: If the braking disk (rotor) needs to be When replacing a rotor with a new part do NOT reface the new rotor. Rotor already has the re- INSPECTION DIAGNOSIS Before refinishing or refacing a braking disc, the disc should be checked and inspected for the following Braking surface scoring, rust, impregnation of lining material and worn ridges. Excessive lateral rotor runout or wobble. The discs will rust in the area not covered by the brake Excessive wear and scoring of the disc can cause temporary improper lining contact if ridges are not Some discoloration or wear of the disc surface is normal and does not require resurfacing when linings Excessive runout or wobble in a disc can increase pedal travel due to piston knock back. This will in- Thickness variation in a disc can also result in pedal pulsation, chatter and surge due to variation in brake Dishing or distortion can be caused by extreme heat and abuse of the brakes. SERVICE PROCEDURES CHECKING BRAKING DISC FOR RUNOUT AND On vehicle, braking disc (rotor) runout is the com- bination of the individual runout of the hub face and If runout is in excess of the specification, check the lateral runout of the hub face. Before removing disc Install Dial Indicator, Special Tool C-3339 and Mounting Adaptor, Special Tool SP-1910 on steering Fig. 1 Checking Braking Disc for Runout Ä BRAKES 5 - 53 |