Technician A says the caliper piston seal prevents leakage of brake fluid between the cylinder bore and the piston. Technician B says the caliper piston seal does not contribute to the piston's automatic adjustment feature. Who is correct?

Question

Quizplus · Accepted Answer

Technician A is correct because the caliper piston seal indeed prevents leakage of brake fluid between the cylinder bore and the piston. Technician B is incorrect because the caliper piston seal does contribute to the piston's automatic adjustment feature by creating a slight pull-back effect on the piston as the brakes are released, which helps in adjusting the position of the piston relative to the brake pad wear.

Technician a Says the Caliper Piston Seal Prevents Leakage of Brake