OEM Chrysler Cirrus Brake Master Cylinder

Chrysler Cirrus Brake Master Cylinder Parts and Q&A

• Master Cylinder
  4764194
  Q: How to Service and Repair a Brake Master Cylinder on Chrysler Cirrus?

  A:

  Start by removing the connection between the brake fluid sensor in the brake master cylinder and your vehicle's wiring harness. At the next stage, take off both sets of brake tubes from the outlets on the brake master cylinder and put plugs in all the empty openings. Wash the connection point between the brake master cylinder and the booster with Mopar Brake Parts Cleaner or use an alternative cleaner. Take out the 2 nuts holding the brake master cylinder assembly to the power brake vacuum booster and slide the assembly off its studs. Set the brake master cylinder in a vise and attach Special Tool 6802, labeled Bleeding Tubes, to its outlets. Place the tubes below the brake fluid surface when the brake master cylinder is full with DOT 3 brake fluid or something similar. With a wooden dowel, apply slow pressure to the push rod and let the Pistons move back until you're certain that no more air bubbles exit the bleed tubes. With the reservoir filled, unplug the tube from the brake master cylinder outlets, cover the outlets, put the fill cap on the reservoir and take the brake master cylinder out of the vise. With the vehicle upside down, fix the frame of the brake master cylinder to the studs of the power brake unit. At the same time, line up the brake master cylinder piston with the push rod on the power brake vacuum booster. Join the brake vacuum booster with the 2 brake master cylinders using their mounting nuts and tighten all to a torque of 28 Nm (250 inch lbs.). At last, attach the brake tubes to the ports on the brake master cylinder, then screw on the tube nuts until they are tightened to a torque of 17 Nm (145 inch lbs.).
• Master Cylinder
  4764192
  Q: How to Bleed a Brake Master Cylinder on Chrysler Cirrus?

  A:

  For bleeding the brake master cylinder, clamp it down in a vise and attach Bleeding Tubes 6802 to both outlet ports, so they remain below the top of the brake fluid in the reservoir. Use fluid that matches DOT 3 standards such as Mopar, to fill the brake fluid reservoir. Insert a wooden dowel into the bleed screws and slowly depress the push rod as the Pistons return to the normal position, continue until you no longer see air bubbles escaping from the bleed tubes. When it's done bleeding, remove the tubes from the outlet ports, plug the ports and set the fill cap onto the reservoir before you ease the brake master cylinder out of the vise. It's fine to not worry about bleeding the entire hydraulic setup after the brake master cylinder is changed, but the brake master cylinder in the vacuum booster needs to be properly bled and filled when it is installed.