Front Brake Caliper Piston (FNR-G60), Removing and Installing

Piston for front brake caliper, removing and installing

Special tools and equipment





^ 3409 Assembly wedge
^ G 052 150 A2 brake cylinder paste





^ T10146/5 Assembly tool for protective caps
^ T10145 Piston resetting tool

Removing





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

Note: Place a wooden board into the recess of the caliper housing to catch the piston so it is not damaged.





- Remove seal.
- Use 3409 wedge for this.

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

Installing
- Use only appropriate solvent to clean surfaces of piston and protective seal, then dry.
- Apply thin coat of brake cylinder paste G 052 150 A2 to piston and protective seal before installing.





- Using 3409 wedge, insert inner sealing ring into cylinder groove.





- Press in protective cap using special tools -1- and -2-.
- Item -1- assembly tool for protective caps T101 46/1
- Item -2- piston resetting tool T10145

Note: Use protective covers.





- Press protective cap onto caliper housing so that it makes contact all round.
- Pulling protective cap away from caliper housing by hand should no longer be possible.
- Thinly coat piston and sealing ring with assembly paste G 052 150 A2 before inserting.





- Pick up brake piston with normal commercial ratchet attachment and extension (as shown), and press lightly against protective cap.

Note: Keep piston straight while installing, to avoid damaging seal.

- Blow air into protective cap using a compressed air line (not more than 3 bar). Protective cap will spring over brake piston.

Note: Use protective covers.

- Push piston into brake caliper housing by hand.

Note: Inner sealing lip will spring into groove on piston when piston is installed.