Dorman M630947 Brake Master Cylinder

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

The Dorman M630947 brake master cylinder is engineered to restore proper brake hydraulics 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 braking performance for heavy-duty applications.

• Master cylinder bore diameter: 1.5 inches for precise hydraulic pressure
• Constructed from cast iron for strength and durability
• Includes a removable reservoir for easy maintenance
• Equipped with a sensor to monitor brake fluid levels
• Three outlets with secondary outlet thread diameter of 12 mm
• Rearward outlet sizes: M14 x 1.5 and M12 x 1.0 thread pitch
• Compatible with Ford F-250 Super Duty, F-350, and F-350 Super Duty models

Product Details and Specifications

The Dorman M630947 brake master cylinder is designed specifically for Ford heavy-duty trucks, featuring a 1.5-inch bore diameter that provides reliable hydraulic pressure for effective braking. Its cast iron construction offers long-lasting durability under demanding conditions. The included removable reservoir simplifies brake fluid inspection and replacement, while the integrated sensor helps monitor fluid levels to maintain safety. This master cylinder has three outlets, including a secondary outlet with a 12 mm thread diameter and rearward outlets sized M14 x 1.5 and M12 x 1.0, ensuring compatibility with the vehicle's brake lines.

Common Applications and Problem Resolution

• Restores brake pressure loss due to worn or damaged master cylinder
• Eliminates brake fluid leaks from cracked or corroded reservoirs
• Resolves brake warning light issues related to sensor failure
• Improves brake pedal feel and responsiveness in Ford F-250 and F-350 trucks
• Addresses hydraulic system failures caused by internal seal wear

Installation Notes and Tips

Installation of the Dorman M630947 brake master cylinder requires proper brake system bleeding to remove air and ensure optimal performance. The removable reservoir allows for easier fluid handling during installation. It is recommended to inspect brake lines and fittings for wear or damage before installation. Since mounting hardware is not included, retain original hardware or source compatible fasteners. Follow vehicle-specific service manual instructions for torque specifications and safety precautions.

Quality Assurance and Warranty Information

Dorman manufactures the M630947 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction and integrated sensor contribute to reliable operation in demanding environments. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Verify warranty terms with the product documentation or supplier.