2 3 34 1 531 1 34 11 521 Disassembling and assem- bling front brake caliper e Attention: Do not separate the brake caliper halves! – Integral ABS Drain front wheel circuit ( a – Remove the brake caliper. • Remove the brake pads. • Close the bleed screw. • Secure two opposing brake pistons with spacer, BMW No. 34 1 520 . • Insert a piece of cloth between the two brake pis- tons not secured by the resetting tool. e Attention: Do not insert your fingers between the pistons; risk of injury. • Carefully press out brake pistons (1), using a compressed air gun at the brake line connection. • Remove the two sealing rings from each brake cylinder bore.
• Inspect the brake caliper piston for hairline cracks, score-marks and other damage. • Coat new sealing rings (2, 3) with brake fluid and install. • Coat brake caliper pistons (1) with brake fluid and insert. 34.5 34 1 532 S340220 e Attention: Keep the brake pistons parallel with their bores when installing. • Remove and install the other two brake pistons in the same way. 6). • Using piston resetting tool, BMW No. 34 1 531, press the pistons fully back. • Install brake caliper. • Integral ABS Fill and bleed front wheel circuit (a 34.23). X is- Tightening torque: Bleed screw to brake caliper.......................... 7 Nm Grub screw in front brake caliper ...................
7 Nm Colour code: k Brake pads/brake calipers ..............................white n.