Chrysler 68048551AA Brake Master Cylinder

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Brake fluid can damage paint or finished surfaces, so it is important to cover all body parts and be cautious not to spill any fluid during the removal process. Any spilled brake fluid should be cleaned up immediately and the area should be washed with large amounts of water. It is also important to note that different vehicle models may have different factory systems installed for the Anti-lock brake system (ABS), so it is necessary to determine which system is on your vehicle for part identification and torque specifications. To begin the removal process, disconnect the cable(s) from the negative battery terminal(s) and depress the brake pedal several times to remove all vacuum from the power brake booster. Remove the brake master cylinder access cover in the cowl and clean the brake master cylinder and reservoir thoroughly with brake cleaner. Remove as much fluid as possible from the reservoir with a syringe and unplug the electrical connector for the brake fluid level warning switch. 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 brake master cylinder using a flare-nut wrench and carefully move the brake lines away from the brake master cylinder, plugging the ends to prevent contamination. Remove the brake master cylinder mounting nuts and pull the brake master cylinder off the studs to remove it, being careful not to spill fluid or bend the brake lines. To install the new brake master cylinder, bench bleed it before installing 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 using a large Phillips screwdriver to expel air from the pressure chambers. Repeat this procedure until no more air bubbles are present and remove the bleed tubes, installing plugs in the open ports to prevent fluid leakage and air from entering. Install a new vacuum seal on the brake master cylinder and then install the reservoir cover. Install the brake master cylinder over the studs on the power brake booster and tighten the attaching nuts finger tight. Thread the brake line fittings into the brake master cylinder, being careful not to strip the threads, and tighten the mounting nuts and brake line fittings securely. Fill the brake master cylinder reservoir with the correct fluid and bleed the brake system as described. Finally, test the operation of the brake system carefully before placing the vehicle into normal service.

Brake fluid can damage paint or finished surfaces, so it is important to cover all body parts and be cautious not to spill any fluid during the removal process. Any spilled brake fluid should be cleaned up immediately and the area should be washed with large amounts of water. It is also important to note that different vehicle models may have different factory systems installed for the Anti-lock brake system (ABS), so it is necessary to determine which system is on your vehicle for part identification and torque specifications. To begin the removal process, disconnect the cable(s) from the negative battery terminal(s) and depress the brake pedal several times to remove all vacuum from the power brake booster. Remove the brake master cylinder access cover in the cowl and clean the brake master cylinder and reservoir thoroughly with brake cleaner. Remove as much fluid as possible from the reservoir with a syringe and unplug the electrical connector for the brake fluid level warning switch. 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 brake master cylinder using a flare-nut wrench and carefully move the brake lines away from the brake master cylinder, plugging the ends to prevent contamination. Remove the brake master cylinder mounting nuts and pull the brake master cylinder off the studs to remove it, being careful not to spill fluid or bend the brake lines. To install the new brake master cylinder, bench bleed it before installing 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 using a large Phillips screwdriver to expel air from the pressure chambers. Repeat this procedure until no more air bubbles are present and remove the bleed tubes, installing plugs in the open ports to prevent fluid leakage and air from entering. Install a new vacuum seal on the brake master cylinder and then install the reservoir cover. Install the brake master cylinder over the studs on the power brake booster and tighten the attaching nuts finger tight. Thread the brake line fittings into the brake master cylinder, being careful not to strip the threads, and tighten the mounting nuts and brake line fittings securely. Fill the brake master cylinder reservoir with the correct fluid and bleed the brake system as described. Finally, test the operation of the brake system carefully before placing the vehicle into normal service.

Before removing the Brake Master Cylinder, the wire connecting the negative terminal of the battery should be disconnected and then the brake pedal should be pressed down several times in order to release the vacuum in the power brake booster. Take off the access cover in the cowl and clean the Brake Master Cylinder and reservoir with brake cleaner and, with the help of a syringe, extract as much of the fluid as possible. Remove the electrical connector of the Brake fluid level warning switch. If there are any further electrical connectors of the ESP system, they should be removed as well. Accompany rags under the fittings and caps or bags for the brake line ends, then turn the fittings at the brake lines entering the Brake Master Cylinder with the flare-nut wrench without rounding off corners of the fittings. Pull the brake lines back and seal off the ends to reduce contamination, and then the mounting nuts have to be unscrewed, and the Brake Master Cylinder has to be pulled off the studs, though being very careful not to spill any of the fluid or kink the lines in the process. For installation, bench bleed the new Brake Master Cylinder by placing it in a bench vise, connecting two bleeder tubes in the two outlet ports of the Brake Master Cylinder, and filling the reservoir with the recommended brake fluid. Gently feel the pistons and slowly force them to enter the Brake Master Cylinder to release all air bubbles, continue until no air can be seen. After disconnecting the bleed tubes and inserting plugs there; put a fresh vacuum seal on the Brake Master Cylinder; cover and bolt the Brake Master Cylinder reservoir over the studs on the power brake booster; do not overtighten it. Connect the brake line fittings to the Brake Master Cylinder without stripping them then tighten all the nuts and other fittings. Add the right fluid in the reservoir and release the brake system through operation of the brake pedal and unscrewing the line fitting to release air and fluid until clear. The last process is to remove the clamps in the reverse order and check for the proper functioning of the brake system before it is put to use.