FAQ for Brake Disc Repair
Q: What should I notice in Front Brake Rotor Removal Procedure?
A:
Remove the brake caliper bracket and the brake caliper as an assembly. Perform the following service procedures to separate the brake rotor from the wheel hub.
By BobGM Specialist
01/11/2022 Q: Which lathe is essential for performing brake work, the bench or the on-car?
A:
Dealers must have a well-maintained bench lathe and a well-maintained on-car lathe. These lathes need to be calibrated monthly. BOTH lathes are essential to providing quality brake service.
By BobGM Specialist
01/11/2022 Q: What is the expected tip life for an on-car lathe?
A:
The geometry and composition of the Pro-Cut tips are designed for °single pass° cutting. When using the Pro-Cut the cutting depth should be set to take all material needed to get below rust grooves, eliminate all run-out and resurface the entire disc in a single pass. Cuts of 0.1016-0.381 mm (0.004-0.015 in) will provide the best surface finish and the optimal tip life. No °skim cut° or °finish cut° is needed. Failure to follow this procedure will shorten tip life. The Pro-cut tips will last between 7-12 cuts per corner. With three usable corners, a pair of tips is good for at least 21 cuts.
By BobGM Specialist
01/11/2022 Q: How do on-car lathes react to Axle Float? Does the play affect the machining of the rotor, either surface finish or LRO?
A:
Because the Pro-Cut on-car lathe adjusts in a live mode while spinning the hub/rotor, the dynamics of a floating axle are effectively eliminated. Once the lathe is compensated, there is no difference in the cutting/surface finish and LRO are just the same as with a non-floating axle.
By BobGM Specialist
01/11/2022 Q: What should I notice in the Installation Procedure?
A:
Whenever the brake rotor has been separated from the hub/axle flange, any rust or contaminants should be cleaned from the hub/axle flange and the brake rotor mating surfaces. If the rotor was removed using the jack screw method you must ensure that the hub flange is free of nicks or marks caused by this procedure. Remove all raised nicks or marks before installing the rotor.
By BobGM Specialist
01/11/2022 Q: What should I notice in Rear Brake Rotor Installation Procedure?
A:
Whenever the brake rotor has been separated from the hub/axle flange, any rust or contaminants should be cleaned from the hub/axle flange and the brake rotor mating surfaces.
By BobGM Specialist
01/11/2022 Q: What should I notice Front Brake Rotor in the Installation Procedure?
A:
Whenever the brake rotor has been separated from the hub/axle flange, any rust or contaminants should be cleaned from the hub/axle flange and the brake rotor mating surfaces. If the rotor was removed using the jack screw method you must ensure that the hub flange is free of nicks or marks caused by this procedure. Remove all raised nicks or marks before installing the rotor.
By BobGM Specialist
01/11/2022 Q: What should I notice in Rear Brake Rotor Removal Procedure?
A:
Any new rotor must have the protective coating removed from the friction surfaces before being placed in service. Remove the protective coating using denatured alcohol or an equivalent brake cleaner, and wipe the surface clean with clean cloths. Do not use gasoline, kerosene, or other oil base solvents which may leave an oily residue. This residue is damaging to the brake lining and is flammable.
By BobGM Specialist
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