Front Caliper Piston, Removing and Installing

Front caliper piston, removing and installing
Special tools and equipment





^ 3409 Wedge
^ Piston resetting tool

Removing





^ Force pistons individually out of brake caliper housing using compressed air.

Note: Only one piston at a time can be forced out. Hold the other piston in the caliper using the piston resetting tool -b-. Place a wooden board -a- in the recess of the caliper housing to prevent damaging the piston.





^ Remove seal using 3409 wedge.

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

Installing
^ Clean surfaces of the piston and seal (use only appropriate solvent) then dry.
^ Apply a thin coat of paste G 052 150 A2 to piston and seal before installing.
^ Install oil seal in brake caliper housing.





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





^ Using 3409 wedge, insert the inner sealing lip into the cylinder grove.

Note: Hold piston in front of caliper housing.





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

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