Front Brake Caliper Piston, FN3 Caliper

Front Brake Caliper Piston, FN3 Caliper

Special tools, testers and auxiliary items required

• Assembly Paste (G 052 150 A2)

• Disassembly Wedge (3409)

• Piston Resetting Tool (T10145)

Removing

- Force piston from brake caliper housing using compressed air.





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

- Remove seal.





- Use the Trim Removal Wedge (3409) for this.

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

Installing

- Insert seal





- Use the Trim Removal Wedge (3409) for this.

- Place protective cap with outer sealing lip on piston.





- 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.

- Using Trim Removal Wedge (3409), insert inner sealing lip into cylinder groove.





• Hold piston in front of caliper housing for this procedure.

- Press piston into the brake caliper housing using Piston Resetting Tool (T10145).





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

• Bleed the brake system after servicing and installing the brake caliper. Refer to => [ Bleeding Brake System ] Procedures