Dorman M630786 Brake Master Cylinder

Reliable Brake Master Cylinder Replacement for Your Vehicle

The Dorman M630786 brake master cylinder is engineered to restore proper brake hydraulics performance in compatible vehicles. Designed with a durable cast iron construction, this master cylinder ensures consistent braking pressure and reliable operation for safe driving.

• Cast iron master cylinder material for durability and strength
• 1.25-inch bore diameter for precise hydraulic control
• Includes master cylinder and bleeder kit for maintenance convenience
• Four mounting holes for secure installation
• Remote reservoir type with two outlets, including a rearward outlet sized M10 x 1.0

Product Details and Specifications

The Dorman M630786 brake master cylinder features a 1.25-inch bore diameter, which is critical for maintaining proper hydraulic pressure in the brake system. Constructed from cast iron, this part offers long-lasting resistance to wear and corrosion. It includes two outlets, with the secondary outlet thread diameter measuring 0.5 inches and the rearward outlet sized M10 x 1.0, designed to fit specific brake line configurations. The remote reservoir design allows for flexible installation options in various vehicle brake systems. Note that this master cylinder does not include a brake booster, mounting hardware, push rod, reservoir, sensor, or mounting bracket, so these components must be sourced separately if needed.

Common Applications and Problem Resolution

• Restores brake pressure in vehicles experiencing spongy or unresponsive brakes
• Replaces master cylinders with internal leaks or worn seals
• Addresses brake fluid contamination issues affecting hydraulic performance
• Solves brake pedal sinking or failure to maintain pressure
• Corrects improper brake booster engagement due to master cylinder wear

Installation Notes and Tips

When installing the Dorman M630786 brake master cylinder, ensure the brake system is properly bled using the included bleeder kit to remove air and maintain hydraulic integrity. Verify compatibility with your vehicle’s brake lines, especially the outlet thread sizes (0.5 inch secondary and M10 x 1.0 rearward). Since mounting hardware and other components are not included, prepare necessary tools and parts before installation. Follow manufacturer torque specifications for the four mounting holes to secure the master cylinder firmly.

Quality Assurance and Warranty Information

Dorman manufactures the M630786 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction provides durability under demanding conditions. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulics parts to ensure customer confidence and product reliability.