Front Brake Caliper Piston - FN 3, Removing and Installing

Front Brake Caliper Piston (FN-3), Removing and Installing
Special tools and equipment





^ 3409 Removal wedge
^ Piston resetting tool

Removing





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

Note: Place a piece of wood in the recess to prevent damage to the piston.





^ Remove seal using wedge 3409.

Note: Make sure when removing the surface of the cylinder is not damaged.

Installing
^ The surface of the piston and seal must only be cleaned with methylated spirits and then dried.
^ Apply thin coat of assembly paste G 052 150 A2 to piston and protective seal before installing.
^ Insert oil seal in brake caliper housing.





^ Position outer sealing lip on piston.





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

Note: When doing this hold piston in front of caliper housing.





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

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