FN3 Brake Caliper

FN3 brake caliper, servicing

Notes:
^ Only use appropriate solvents for cleaning to clean brake parts.
^ Install all parts supplied in repair kit.
^ New brake calipers are filled with brake fluid and are prebled.
^ Apply a thin coat of installing paste G 052 150 A2 to brake cylinders, pistons and seals.





1 - Cap
^ Insert in mounting bush
2 - Guide pin, 25 Nm
3 - Bleed valve
^ Apply thin coat of assembly paste G 052 150 A2 to threads before screwing in
4 - Protective cap
^ Push onto bleed valve
5 - Brake caliper housing
6 - Retaining spring
^ Insert with both ends in the holes in brake caliper housing
7 - Mounting bush
^ Insert into brake caliper housing
8 - Brake carrier
^ Install on brake caliper housing
9 - Seal
10 - Piston
^ Apply a thin coat of paste G 052 1 50 A2 to piston before installing
^ Piston diameter 57 mm
11 - Protective - seal
^ Do not damage when installing piston

Front caliper piston, removing and installing

Special tools and workshop equipment required





^ 3409 Wedge
^ Piston resetting tool

Removing





^ Force piston from brake caliper housing using compressed air.

Note: Place a wooden board in the recess of the caliper to prevent damaging the piston.





^ Remove seal using 3409 wedge.

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

Installing
^ Clean surfaces of the piston and seal (use only appropriate solvent) then dry.
^ Apply a thin coat of paste G 052 150 A2 to piston and seal before installing.
^ Install oil seal in brake caliper housing.





^ Place protective seal with the outer sealing lip on the piston.





^ Using 3409 wedge, insert the inner sealing lip into the cylinder grove.

Note: Hold piston in front of caliper housing.





^ Press piston into the brake caliper housing using piston resetting tool.

Note: The sealing lip of protective outer seal will then engage in the piston groove.