Genuine Jeep Wagoneer Brake Master Cylinder

Jeep Wagoneer Brake Master Cylinder Parts Questions & Answers

• Brake Mastr Cylinder
  V1102622AA
  Q: How to consider when overhauling the master cylinder?

  A: When considering the overhaul of the Brake Master Cylinder, it's important to first explore the availability and cost of new or factory rebuilt units and check for the availability of a rebuild kit. Proceeding with the removal, precautions should be taken to prevent brake fluid spillage and damage to paint by using rags under the brake line fittings and covering disconnected line ends. Utilize a flare-nut wrench to loosen the tube nuts at the brake lines' ends entering the Brake Master Cylinder, then plug the line ends to prevent contamination. Remove the Brake Master Cylinder mounting nuts and the reservoir cover before discarding any remaining fluid. For the overhaul process, secure the Brake Master Cylinder in a vise and remove the primary piston snap-ring by depressing the piston and extracting the ring with snap-ring pliers. Remove the primary piston assembly and discard it, as it can only be serviced as an assembly. Remove the secondary piston assembly by applying compressed air to the secondary brake line port, ensuring proper shielding. Inspect the cylinder bore for damage or corrosion, and if found, replace the Brake Master Cylinder body. Clean components, assemble new seals, O-ring, piston spring, and seal retainer to the secondary piston, and lubricate the cylinder bore and piston assemblies with clean brake fluid. Install both pistons, the snap-ring, and inspect the reservoir cover and diaphragm. Bench bleed the Brake Master Cylinder by filling it with brake fluid, inserting threaded plugs into the outlet holes, and repeatedly pushing and releasing the piston while maintaining the appropriate plugs. Once fully bled, refill the Brake Master Cylinder reservoir, install the diaphragm and cover assembly, and proceed with the installation, followed by brake bleeding.