FN 3 Brake Caliper Piston

FN 3 Brake Caliper Piston

Special tools, testers and auxiliary items required

• Disassembly wedge (3409)

• Piston resetting tool (T10145)

• Assembly device for protective cap (T10146/6)

Removing

- Force piston from brake caliper using compressed air - arrow -.





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

- Pry off protective cap from brake caliper using (3409).





- Remove seal using (3409).





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.

- Insert protective cap - A - into (T10146/6) - 1 -.





- Press protective cap onto brake caliper using assembly tool - 1 - and (T10145) - 2 - so that it makes contact all around on brake caliper.





Check seating of protective caps:





- Protective cap must no longer be able to be pulled from brake caliper by hand.

- Press piston lightly onto protective cap and then secure it in this position using e.g. (3409) - 2 -.





Do not angle piston, to avoid damaging the seal sleeve.

- Blow compressed air (max. 3 bar) onto protective cap - 1 -. Protective cap springs onto piston.

- Press piston into brake caliper using piston resetting tool - 1 -.





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