Disc brake caliper pistons are being removed. Technician A positions a large dull screwdriver in the piston's dust boot groove to pry out the piston. Technician B injects 25 psi (172 kPa)of air pressure into the fluid line connection bore to remove the caliper piston. Who is correct?

Question

Quizplus · Accepted Answer

Using air pressure to remove the caliper piston is a common and safe method, whereas prying out the piston with a screwdriver can damage the piston or caliper.

Disc Brake Caliper Pistons Are Being Removed