Answer :
Both technicians are correct.
What precisely is resurfacing drums?
In the resurfacing process, the damaged metal layer is removed in order to create a smooth brake-bedding surface for the brake pads. This will result in a like-new drum or rotor surface for better, more consistent, and even friction application while braking.
A grinding or squealing noise coming from the rear is one of the most obvious signs that one of your brake drums needs resurfacing. This is usually caused by pads that have had their braking material completely worn off. When this occurs, the hard metal of the pad rubs against the metal of the drum, causing damage and necessitating drum resurfacing or replacement.
Anti-vibration (AV) devices are critical components in reducing noise and vibration in heavy machinery and equipment.
Thus, anti-vibration devices are only required when resurfacing drums.
What is Bench Lathe?
It is a material reduction machine that is integrated into a bench or worktable. The lathe is intended to hold the block at two points while spinning it for resurfacing.
As a result, when hubless brake rotors are mounted on a bench lathe for resurfacing, special adapters are required to keep them in place.
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Final answer:
Technician B is correct. Hubless brake rotors require special adapters when mounted on a bench lathe for resurfacing.
Explanation:
Technician B is correct. Anti-vibration devices are used to reduce vibrations and noise in the braking system, which is important for the smooth operation of the vehicle. These devices are typically used when mounting brake rotors on a bench lathe for resurfacing, especially when dealing with hubless brake rotors. Hubless brake rotors require special adapters to securely hold them in place during resurfacing.
