Dorman M630779 Brake Master Cylinder

Reliable Brake Master Cylinder for Jeep Grand Cherokee

The Dorman M630779 brake master cylinder is engineered to provide consistent hydraulic pressure for your Jeep Grand Cherokee's braking system. Designed with precision, this aluminum master cylinder ensures durability and reliable performance under demanding conditions.

• Compatible with Jeep Grand Cherokee models
• Master cylinder bore diameter: 1.063 inches for accurate hydraulic control
• Constructed from durable aluminum material
• Includes three outlets with M12 x 1.0 thread size for secure connections
• Does not include reservoir, mounting hardware, or sensor
• Package contains the master cylinder only

Product Details and Specifications

The Dorman M630779 brake master cylinder features a 1.063-inch bore diameter, which is critical for maintaining proper brake fluid pressure and pedal feel. Its aluminum construction offers resistance to corrosion and heat, contributing to long-term reliability. This master cylinder is designed with three outlets, each threaded M12 x 1.0, allowing for secure attachment to the brake lines. Note that this unit does not come with a reservoir or mounting hardware, so those components must be sourced separately if needed.

Applications and Common Issues Addressed

• Restores proper brake fluid pressure in Jeep Grand Cherokee brake systems
• Replaces worn or leaking master cylinders causing brake pedal sponginess
• Solves brake fluid leaks from damaged or corroded master cylinders
• Addresses inconsistent braking performance due to internal seal failure
• Supports brake system maintenance and rebuild projects

Installation Notes and Tips

When installing the Dorman M630779 master cylinder, ensure the brake system is properly bled to remove air and maintain optimal braking performance. Since mounting hardware and reservoir are not included, verify compatibility with existing components or acquire replacements as necessary. Use thread sealant or appropriate fittings on the M12 x 1.0 outlets to prevent leaks. Professional installation is recommended to ensure safety and correct operation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable fit and function for your Jeep Grand Cherokee. The M630779 brake master cylinder undergoes rigorous quality control to ensure durability and performance. Please refer to Dorman's warranty policy for specific coverage details.