Front Brake Caliper Piston - 2FN, Removing and Installing

Front Brake Caliper Piston, (2FN,) 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 damaging the piston.
You can only remove one piston at a time; hold the other piston in the caliper housing using the piston resetting tool.





^ Remove protective seal from piston groove using wedge 3409.
^ Take out piston.

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





^ Take out protective seal using wedge 3409.





^ Use wedge 3409 to remove seal.

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

Installing
^ The surface of the piston and seal must be cleaned with methylated spirits only, and then dried.
^ Thinly coat piston and seal with assembly paste G 052 150 A2 before inserting.
^ Insert seal in brake caliper housing.





^ Position outer sealing lip of protective seal on piston.





^ Insert the inner sealing lip into the grove in the cylinder, using wedge 3409.

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





^ Press piston into brake caliper housing as far as possible by hand.





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

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