Dorman M630946 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford F-250 and F-350 Super Duty

The Dorman M630946 brake master cylinder is engineered to restore proper brake function in Ford F-250 Super Duty, F-350, and F-350 Super Duty trucks. Designed with durable cast iron and a removable reservoir, this master cylinder ensures consistent hydraulic pressure for safe braking performance.

• Master cylinder bore diameter: 1.5 inches for precise hydraulic control
• Constructed from cast iron for long-lasting durability
• Includes a removable reservoir for easy maintenance
• Equipped with two outlets and a sensor for accurate brake fluid monitoring
• Secondary outlet thread diameter: 12 mm; rearward outlet size: M14 x 1.5
• Compatible with Ford F-250 Super Duty, F-350, and F-350 Super Duty models

Product Details and Specifications

The Dorman M630946 brake master cylinder features a 1.5-inch bore diameter, providing the necessary hydraulic pressure to operate the braking system effectively. Its cast iron construction offers strength and resistance to wear, suitable for heavy-duty applications in Ford Super Duty trucks. The included removable reservoir simplifies brake fluid inspection and replacement, while the integrated sensor helps monitor fluid levels to maintain optimal brake system performance. This master cylinder has two outlets, with a secondary outlet thread diameter of 12 mm and a rearward outlet size of M14 x 1.5, ensuring compatibility with the vehicle's brake lines and fittings.

Common Applications and Problem Resolution

• Restores brake pressure in Ford F-250 and F-350 Super Duty trucks
• Replaces leaking or damaged master cylinders causing brake fluid loss
• Addresses spongy or unresponsive brake pedal issues
• Fixes brake warning light activation due to sensor faults
• Improves brake system reliability after reservoir damage or wear

Installation Notes and Tips

Installation of the Dorman M630946 brake master cylinder requires proper brake system bleeding to remove air and ensure optimal hydraulic function. The removable reservoir design facilitates fluid handling during installation. Verify thread sizes (12 mm secondary outlet and M14 x 1.5 rearward outlet) to ensure compatibility with existing brake lines. Professional installation is recommended to maintain safety and performance standards.

Quality Assurance and Warranty

Dorman brake master cylinders are manufactured to meet or exceed OEM specifications for fit, form, and function. The M630946 part undergoes rigorous quality control to ensure durability and reliable performance in demanding conditions. Warranty coverage details can be obtained from the product documentation or manufacturer resources.