FN 3 Caliper

Brake Caliper Piston

Special tools, testers and auxiliary items required

• Trim removal wedge (3409)

• Piston resetting tool (T10145)

• Disk (T10146/6)

Removing

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





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

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





- Remove the seal using the (3409).





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

Installing

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

- Coat the piston and seal with a thin layer of assembly paste (G 052 150 A2) before installing.

- Install the sealing ring in the brake caliper.

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





- Press the protective cap onto the brake caliper using (T10146/6) - 1 - and (T10145) - 2 - so that it makes contact all around on the brake caliper.





Check seating of the protective caps





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

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





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

- Using compressed air (max. 3 bar), blow onto the protective cap - 1 -. Protective cap springs onto the piston.

- Press the piston into the brake caliper using (T10145) - 1 -.





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