Dorman M630912 Brake Master Cylinder

Reliable Brake Master Cylinder Replacement for Your Vehicle

The Dorman M630912 brake master cylinder is designed to restore proper brake hydraulics in compatible vehicles. Featuring a durable cast iron construction and an integral reservoir, this master cylinder ensures consistent brake fluid delivery for safe and effective braking performance.

• Master cylinder bore diameter: 1 inch
• Constructed from cast iron for durability
• Includes integral reservoir for brake fluid
• Single outlet design with 1/2-20 rearward outlet size
• Package contains the master cylinder only; mounting hardware not included

Product Details and Specifications

The Dorman M630912 brake master cylinder is engineered with a 1-inch bore diameter to provide precise hydraulic pressure for your vehicle's braking system. Its cast iron material offers strength and resistance to wear, ensuring long-lasting performance. The integral reservoir design simplifies installation and maintenance by housing the brake fluid directly on the master cylinder. This part features a single outlet with a 1/2-20 rearward outlet size, compatible with specific brake line fittings. Note that this master cylinder does not include mounting hardware or sensors.

Common Applications and Problem Resolution

This brake master cylinder is typically used to address issues such as:

• Spongy or unresponsive brake pedal feel
• Brake fluid leaks from the master cylinder or reservoir
• Brake warning light activation due to hydraulic failure
• Reduced braking efficiency or uneven brake pressure
• Contaminated or deteriorated internal seals causing fluid loss

Installation Notes and Tips

When installing the Dorman M630912 master cylinder, ensure the brake system is properly bled to remove air and restore hydraulic pressure. Since mounting hardware is not included, retain or source compatible bolts and fittings for your specific vehicle. Verify the rearward outlet size (1/2-20) matches your brake line connections to avoid leaks. Always follow manufacturer torque specifications and safety procedures during installation.

Quality Assurance and Warranty Information

Dorman manufactures the M630912 brake master cylinder to meet or exceed OEM standards for fit and function. The cast iron construction and integral reservoir design contribute to reliable brake system performance. While mounting hardware and sensors are not included, the part is backed by Dorman's quality control processes. Please consult Dorman's warranty policy for coverage details.