Front Caliper Piston, Removing and Installing

Front caliper piston, removing and installing

Special tools and equipment required





^ 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.

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 seal out of piston groove using wedge 3409.
- Remove piston.

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





- Remove protective seal using wedge 3409.





- Remove seal using wedge 3409.

Note: When removing ensure that 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.





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





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





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

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 protective seal outer sealing lip will then locate in piston groove.