Master Cylinder: Disassembly

Push in primary piston and remove plug. See Fig 1. Remove retaining ring from end of cylinder. Remove primary and secondary piston assemblies and stopper washer. Disassemble piston assemblies, noting number and position of parts used for reassembly reference. See Fig 1.

Fig 1: Exploded View Of Master Cylinder Assembly

Courtesy of BMW OF NORTH AMERICA.