Removing the brake master cylinder
To a certain extent, the master brake cylinder is the main element of the brake system. It is located at the rear left in the engine compartment and signals the brake calipers and wheel brake cylinders to start braking. You will find more detailed information about its construction and functioning at the beginning of the chapter.
Shown here is the safety bracket (arrow) left hand brake cable. To unhook the handbrake cable, bend the safety bracket. When installing, use a new safety bracket.
Unscrew the cap of the expansion tank with brake fluid.
Suck out the brake fluid from the expansion tank.
Remove the supply pipe to the clutch slave cylinder from the expansion tank with brake fluid.
Unscrew all brake pipes on the main brake cylinder. Be careful, brake fluid leaks!
Slightly tilt a broad tank and remove from the main brake cylinder.
Unscrew the screw connection of the main brake cylinder / brake booster.
Remove the master brake cylinder from the brake booster.
Slide the brake master cylinder with new O-ring onto the pins on the brake booster, tighten with new self-locking nuts (22 Nm).
Fit the brake pipes and tighten to 16 Nm.
Lubricate new gaskets with brake cylinder paste 90 295 751/19 70 505 and insert into brake master cylinder.
Put the expansion tank on the brake master cylinder and install the clutch slave cylinder supply pipe.
Refill with brake fluid.
Bleed the brake system, check the tightness of the connections.
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