BMW 34312227466 Brake Master Cylinder

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When replacing the brake master cylinder use a line wrench to unscrew or screw the brake line flare nut to serve the purpose of installing or removing the brake master cylinder. If ASC+T is fitted in the car, then there is BMW Service Tester for proper system bleeding and because of certain safety and liability issues this job is better left with the BMW dealer. First, begin by draining brake fluid from the reservoir and also remove the clutch hose if it's accessible, using a small flat blade pry tool to pull the pipe clamp free. Thoroughly flush and clear all brake line connections, then unbolt the reservoir-to-brake master cylinder mounting bolt on the right side of the brake master cylinder and unplug the reservoir, using a trim panel puller if required. For the E36 models, turn the engine off, and remove the connectors to the harness for easier access. Next shut off the brake master cylinder and disconnect the line connections using a line or flare wrench and put the connections plugs if available. Subsequently, it can be necessary to unscrew the mounting nuts and extract the brake master cylinder out of the booster, and in this process do not lose the O-ring. For installation, examine the O-ring placement at the mounting flange and clean these two surfaces, then fit the brake master cylinder tighten the nut to 14.5 ft. lbs. or 20 Nm. Torque the brake lines to 10 ft lbs and reconnect the harness connectors for E36 models. Wash the reservoir with brake cleaner or isopropyl alcohol and lubricate the spigots and O-rings with clean brake fluid, and put the reservoir back in. If needed replace the clutch hose using a new clamp, add fresh approved brake fluid to the reservoir and bleed in the same procedure as used above.