FAQ for Brake Disc Repair
Q: What is the purpose of burnishing the brake pads and brake rotors?
A:
The purpose is to ensure that the braking surfaces are properly prepared after service has been performed on the disc brake system.
By BobGM Specialist
01/11/2022 Q: When can you road test a vehicle?
A:
You can road test a vehicle under safe conditions while obeying all traffic laws.
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 should you do before removing the tire and wheel assembly?
A:
You should raise and support the vehicle.
By BobGM Specialist
01/11/2022 Q: What should you do whenever the brake rotor has been separated from the hub/axle flange?
A:
You should clean any rust or contaminants from the hub/axle flange and the brake rotor mating surfaces.
By BobGM Specialist
01/11/2022 Q: What tool can be used to support the brake caliper?
A:
You can use heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected.
By BobGM Specialist
01/11/2022 Q: Is it okay to leave the caliper/pads installed while cutting rotors using an on-car lathe?
A:
On-car lathes should never be used with the pads and calipers installed on the vehicle. The debris from cutting the rotors can contaminate the brake pads/calipers which can lead to other brake concerns and comebacks.
By BobGM Specialist
01/11/2022 Q: What can be used to clean any rust or corrosion from the mating surface of the hub/axle flange?
A:
You can use the J 42450-A.
By BobGM Specialist
01/11/2022 Q: What tool can be used to compress the piston into the caliper bore just enough to allow the caliper to slide away from the rotor?
A:
You can use the C-clamp.
By BobGM Specialist
01/11/2022 Q: What should you check before refinishing a brake rotor?
A:
You should check the rotor for adequate thickness to allow the rotor to be refinished and remain above the minimum allowable thickness after refinishing specification.
By BobGM Specialist
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