Technician A says that a steel piston should be cleaned with sandpaper to remove rust. Technician B says that brake assembly fluid or clean brake fluid should be used to lubricate the caliper pistons before installing in the caliper. Which technician is correct?

Question

Quizplus · Accepted Answer

Technician B is correct because using brake assembly fluid or clean brake fluid to lubricate caliper pistons is standard practice to ensure smooth operation. Technician A is incorrect because using sandpaper on a steel piston can damage the surface and is not recommended for rust removal.

Technician a Says That a Steel Piston Should Be Cleaned