OEM Chrysler 300M Brake Master Cylinder

Chrysler 300M Brake Master Cylinder Parts and Q&A

• Master Cylinder
  4779530
  Q: How to Service and Repair a Brake Master Cylinder on Chrysler 300M?

  A:

  Hold the brake master cylinder in a vise, but don't tighten it too much, so that it remains secure and safe from damage. Since your brake master cylinder is equipped with ISO style flares, thread the outlet ports with metric tools from Special Tool Packages, put the open ends of the bleeding tools in the fluid reservoir and use the tubing fittings on the brake master cylinder's outlet ports. Keep both open ends of the bleeding tubes below the braking fluid reached in the reservoir when adding Mopar or similar DOT 3 brake fluid. Depress the brake master cylinder pistons with a wooden dowel, release them and repeat this until there are no air bubbles visible. After that, unplug the bleeding tubes and then put them aside, close the outlets and place the filler cap on the brake master cylinder. Lastly, remove the brake master cylinder from the vise and connect it to the power brake vacuum booster, since you only need to bleed the area around the brake master cylinder after replacing it.
• Master Cylinder
  4779292AA
  Q: How to Bleed a Brake Master Cylinder on Chrysler 300M?

  A:

  Before you bleed it, put the brake master cylinder in a vise and clamp it tightly but gently, so you do not damage it. The outlet ports of the brake master cylinder use ISO style flares and metric threads which means you should install ISO style flares with Bleeder Tubes using Special Tool Package 8822, 8358 and 8362. On brake master cylinders not using ABS, attach an Adapter, Special Tool 8822-2, in each port and tighten it to a torque of 17 Nm (145 inch lbs.). On the ABS brake master cylinder, insert Adapter, Special Tool 8822-2, into the primary outlet port and insert Adapter Special Tool 8822-1 into the secondary outlet port, tighten each firmly to 17 Nm (145 inch lbs.) torque. Afterward, put one tube from Bleeder Tube, Special Tool 8398-1, into each Bleeder and tighten each tube to 17 Nm (145 inch lbs.) while pushing each one down into the fluid reservoir as much as you can and making sure they are below the level of the brake fluid once the reservoir is filled to avoid taking in air. Pour Mopar Brake Fluid or anything that meets DOT 3 standards, into the reservoir so the fluid is above the tops of the bleeder tube valves. Pushing in on the brake master cylinder pistons with a wooden dowel, slowly depress them. Afterward, release the pressure and let them go back to their initial placed position. Perform this process many times until all the air bubbles are removed, always making sure the fluid is above the tips of the bleeder tubes. After letting the tube fill, unplug the bleeding tubes, fit outlet caps and attach the filler cap. Take the brake master cylinder out of the vise and set it onto the power Brake Booster.