Lexus 47201-33210 Cylinder Sub-Assy, Brake Master

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Take out the Brake Master Cylinder by first unfastening the electrical connector for the brake fluid level warning switch. Next, employ a syringe to draw as much fluid as possible from the reservoir. Put rags below the fittings and have caps or plastic bags ready to cover them once they are detached. Use a flare nut wrench to slacken the fittings at both ends of the brake pipes where they go into the Brake Master Cylinder. Unplug the brake lines from the cylinder and insert stoppers at their ends to prevent contamination. Remove nuts linking up the Brake Master Cylinder with the power booster and pull it gently away from the stud bolts. When installed, bench bleed the new Brake Master Cylinder by securing it in a vise with a pair of bleeder tubes attached to its outlet ports. Fill the reservoir with recommended brake fluid and gradually push the pistons into the Brake Master Cylinder to discharge air. Repeat the process until no more air bubbles are seen. Disconnect the tubes and fit plugs into the open ports. Mount the Brake Master Cylinder onto the studs of the power brake booster and tighten the attaching nuts by hand. Thread the brake line fittings into the Brake Master Cylinder; fully tighten the mounting nuts then the brake line fittings. Fill the reservoir with fluid in the Brake Master Cylinder; bleed out any remaining air in the Brake Master Cylinder or brake systems. Very cautiously test that the brakes work perfectly normal before putting the vehicle into service.