Master cylinder — bulkhead (Audi 80 B3)

1. The master cylinder is sealed, so it cannot be disassembled. If defective, replace with a new one.

2. The reservoir can be removed by simply pulling it off the rubber o-rings. Remove the sealing rings with a screwdriver.

3. Clean the main cylinder inlets. Immerse the o-rings in clean brake fluid, insert them into the master cylinder, then put a reservoir over the o-rings.