Toyota 47201-07010 Brake Master Cylinder Sub-Assembly

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Start by unplugging the electrical connector for the brake fluid level warning switch. Then, use a syringe to remove as much fluid as possible from the reservoir. Place rags under the fittings and prepare caps or plastic bags to cover the ends of the lines once they're disconnected. Loosen the fittings at the ends of the brake lines where they enter the master cylinder using a flare-nut wrench. Pull the brake lines away from the master cylinder and plug the ends to prevent contamination. Remove the nuts attaching the master cylinder to the power booster and carefully pull the master cylinder off the studs.

First, mount the new master cylinder in a vise. Then, attach a pair of master cylinder bleeder tubes to the outlet ports. Fill the reservoir with recommended brake fluid and slowly push the pistons into the master cylinder to expel air. Repeat this procedure until no more air bubbles are present. Remove the bleed tubes and install plugs in the open ports.