Rear Brake Caliper Piston: Removing

-- Remove pistons as far as possible from brake caliper

-- Force piston out of brake caliper housing using compressed air.

Fig 1: Forcing Piston Out Of Brake Caliper Housing Using Compressed Air

Courtesy of AUDI OF AMERICA, LLC

NOTE:

When removing, make sure that surface of cylinder is not damaged.

Place a wooden board into the recess of the caliper housing so it is not damaged.

-- Remove old seal from brake caliper with 3409.

Fig 2: Identifying Old Seal From Brake Caliper With Trim Removal Wedge 3409, Removal/Installation

Courtesy of AUDI OF AMERICA, LLC