Rear Brake Caliper

Rear brake caliper

Notes:
^ When repairing install all parts supplied in repair kit.
^ New brake calipers are filled with brake fluid and pre-bled.
^ Apply a thin coat of assembly lubricant, Part No. G 052 150A2, to brake cylinders, pistons and seals.
^ When repairing, it is essential to appropriately pre-bleed the brake calipers (without brake pads) before installation in the vehicle





1 Self-locking hex bolt, 35 Nm (26 ft. lbs.)
^ Always replace
^ When loosening and tightening counterhold on guide pin
2 Bleeder valve
^ Apply a thin coat of assembly lubricant G 052 1 50 A2 to threads before installing
3 Dust cap
4 Guide pins
^ Grease before pulling on protective cap
5 Protective cap
^ Pull onto brake carrier and guide pin
6 Brake carrier with guide pin and protective cap
^ Replacement part is assembled with sufficient grease on guide pins
^ If protective caps or guide pins are damaged, install repair kit. Use grease packet supplied to lubricate the guide pins.
7 Protective seal
^ Pull outer sealing lip onto piston
8 Piston with - automatic adjustment
^ Apply thin coat of assembly lubricant G 052 150A2 to piston before inserting
9 Sealing ring
^ Removing and installing
10 Brake caliper housing with parking brake cable lever
^ If a leak exists at the parking brake cable lever replace brake caliper housing
^ After repairing, pre-bleed caliper housing

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





^ 3272 Piston resetting and removal tool





^ 3409 Wedge
^ Bleeder bottle

Removing





^ Remove piston from brake caliper housing by turning knurled wheel counterclockwise.

Notes:
^ Install special tool 3272 with the collar (arrow) positioned before the piston.
^ If the piston is difficult to move, use a 13 mm open end wrench on the flats (arrow-A-) provided for this purpose.





^ Remove seal using wedge 3409.

Installing
^ Apply a thin coat of assembly lubricant G 052 150 A2 to piston and seal before inserting.





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





^ Hold piston in front of caliper housing and install inner sealing lip into groove in cylinder using wedge 3409.





^ Screw piston into housing by turning knurled wheel clockwise.

Notes:
^ Install special tool 3272 with the collar (arrow) seated on the brake caliper.
^ If the piston is difficult to move, use a 13 mm open end wrench on the flats (arrow -A-) provided for this purpose.
^ If the piston is pushed back with a piston re-seeing tool or by operating the foot brake, the automatic adjustment in the brake caliper is destroyed.

^ Install brake pads.

Pre-bleeding brake caliper





^ Position brake caliper as shown in illustration.
^ Open bleeder valve (arrow -A-) and fill a standard bleeder bottle with brake fluid until bubble-free brake fluid flows from brake hose connection (arrow-B-).
^ Close bleeder valve.