Use pliers to loosen the clamps securing the flexible hoses to the fittings of the master brake cylinder.
Carefully holding the fittings, remove the hoses.
Drain the brake fluid from the reservoir into a container.
To replace the brake master cylinder..
... pry it with a screwdriver..
... and remove from the seat of the master brake cylinder.
We pry off the rubber connecting sleeve with a screwdriver..
...and take it out.
To remove the brake master cylinder..
... with a special key «on 10», covering the five faces of the nut, unscrew the fittings of the four brake pipes.
We remove the pipes from the brake cylinder.
ring wrench «at 17» unscrew the two nuts securing the master brake cylinder to the vacuum booster..
... and remove the master brake cylinder.
Install the brake master cylinder in reverse order. Bleeding the hydraulic system (see Bleeding the brakes).