Piston For Front Brake Caliper FN3, Removing and Installing

Piston for front brake caliper, removing and installing

Special tools, testers and auxiliary items required
^ Assembly paste G 052 150 A2

Trim removal wedge 3409:

Piston resetting tool T10145:

Removing





- Use compressed air to force piston out of brake caliper housing.

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





- Remove seal.
- Use trim removal wedge 3409 for this step.

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

Installing





- Insert O-ring.
- Use trim removal wedge 3409 for this step.





- Place protective cap with outer sealing lip on the piston
- The surface of the piston and seal should be cleaned using only methylated spirits and then dried.
- Apply a thin coat of lithium grease G 052 150 A2 to piston and seal before inserting.





- Using trim removal wedge 3409, insert inner sealing lip into groove of cylinder.

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





- Press piston into the brake caliper housing using piston resetting tool T10145.

Note: The outer sealing lip of the protective cap will then lock in the groove on piston.