Replacing primary sealing boot, rear brake master cylinder (Inspection III, every 40,000 km/24,000 miles for motorcycles with ABS) – Place the motorcycle on the auxiliary stand, BMW No. 00 1 620 . e Attention: Do not allow brake fluid to come into contact with painted parts of the motorcycle, because brake fluid destroys paint. • Drain the rear brake system. • Remove spring (4) with insert (3). e Attention: Note the washer between the brake piston and the boot. • Remove front boot (5). • Installation is the reverse of the removal proce- dure: pay particular attention to the following. 1 e Attention: Sealing lip of the boot toward the pressure cham- ber. 2 K14000290 • Install new front boot.
• Prior to installation, coat the brake piston and the boots with the assembly fluid supplied. • Lightly grease the thrust rod with Shell Retinax A . • Disengage piston thrust rod (1). • Remove the piston thrust rod complete with sealing boot (2). • Carefully force back the brake piston. • Remove the circlip. • Use pliers to remove the brake piston. e Attention: When bleeding a brake system drained beforehand, always operate the brake lever to the full extent of its travel several times during the procedure. – Fill and bleed the brake system ( a 00.50). 00.53 4 3 5 E340290