Rear Brake Caliper Piston, Removing and Installing

Rear brake caliper piston, removing and installing
Special tools and equipment





^ 3272 Reset and screwout tool
^ 3272/1 Reset and screwout tool plate





^ 3409 Wedge
^ Bleeder bottle

Removing





^ Screw piston out of brake caliper housing by turning the knurled wheel counter clockwise.

Notes:
^ Install special tool 3272 so that the collar (arrow) is before the piston.
^ For pistons that are difficult to move, use open-end wrench (use 13 mm) on the flats (arrow A) provided for this purpose.





^ Remove seal using wedge 3409.

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.





^ Screw piston into housing by turning knurled wheel clockwise.

Note:
^ Install special tool 3272 so that the collar of the tool rest on special tool 3272/1.
^ For piston that are difficult to move, use open-end wrench (use 13 mm) on flats (arrow A).

^ Install brake pads.

Pre-bleeding brake caliper





^ Open bleed valve -arrow A- and fill with brake fluid, using a standard bleeder bottle until bubble-free brake fluid flows from the threaded hole -arrow B- (brake hose connection). Close bleed valve.

Note: Position brake caliper as illustrated to pre-bleed.