Mopar 5142503AA Brake Master Cylinder

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The brake master cylinder is located in the engine compartment and is mounted on the power brake booster. To remove it, start by disconnecting the cable from the negative battery terminal and pumping the brake pedal to deplete the vacuum reserve in the power brake booster. Use a syringe or equivalent to siphon the brake fluid from the brake master cylinder reservoir. Remove the air filter housing and unbolt the underhood fuse/relay box. Disconnect the brake fluid level switch connector 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. Disconnect the fluid lines from the brake master cylinder with a flare-nut wrench and remove the nuts attaching the brake master cylinder to the power booster. When installing the brake master cylinder, bench bleed it first by mounting it in a vise and attaching a pair of brake master cylinder bleeder tubes to the outlet ports. Fill the reservoir with brake fluid and slowly push the pistons into the brake 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. Install the brake master cylinder over the studs on the power brake booster and tighten the nuts finger-tight. Thread the brake line fittings into the brake master cylinder and tighten them securely. Fill the brake master cylinder reservoir with fluid and bleed the brake master cylinder and the rest of the brake system. Reinstall any components that were removed and re-check the brake fluid level before testing the brake system.