Front Caliper Piston FS III

Special tools and workshop equipment required

Removing

-- Force piston from brake caliper using compressed air.

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

Fig 1: Identifying Brake Caliper Housing

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Remove seal using 3409.

Fig 2: Identifying Removal Of Brake Caliper Seal With Wedge 3409

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

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

Installing

-- The surface of the piston and seal must only be cleaned with mineral spirits and then dried.

-- Thinly coat piston and seal with assembly paste G 052 150 A2 before inserting.

-- Install sealing ring in brake caliper.

-- Place protective cap with outer sealing lip onto piston.

Fig 3: Identifying Protective Seal With The Outer Sealing Lip On The Piston

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Using 3409, insert inner sealing lip into cylinder groove.

Hold piston in front of brake caliper for this procedure.

Fig 4: Inserting Inner Sealing Lip In Grove In Cylinder Using Wedge 3409

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Press piston into brake caliper using piston resetting tool.

Fig 5: Identifying Piston Pressed Into Brake Caliper Housing With Piston Resetting Tool

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Outer sealing lip of protective cap will then engage in piston groove.