Piston For 2FN Brake Caliper, Removing and Installing

Piston for 2FN brake caliper, removing and installing

Special tools, testers and auxiliary items required





^ Wedge 3409





^ Piston resetting tool T10145

Removing





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

Note:
^ Place a piece of wood into the recess, so that the piston is not damaged.
^ Only one piston at a time can be forced out. When doing this hold the other piston in the caliper using the piston resetting tool.





- Remove protective cap from piston groove with wedge 3409.
- Remove piston.

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





- Remove protective cap using wedge 3409.





- Remove seal using wedge 3409.

Note: 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.





- Thinly coat piston and seal with assembly paste G 052 150 A2 before installing.
- Insert oil seal in brake caliper housing.





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





- Using wedge 3409, insert inner sealing lip into the groove in the cylinder.

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





- Press piston into the 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 cap thereby slips into the groove on the piston.