Caliper Piston, Removing and Installing

FN 3 Front caliper piston, removing and installing

Special tools and equipment





^ 3409 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.





- Remove seal using wedge 3409.

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

Installing
- The surfaces of the piston and seal must be cleaned with methylated spirits and then dried.
- Thinly coat piston and seal with lubricant G 052 150 A2 before inserting.
- Insert oil seal in brake caliper housing.





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