Dorman M39446 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford E-150, E-250, and F-250

The Dorman M39446 brake master cylinder is engineered to restore proper brake hydraulics for select Ford Econoline and F-Series trucks. Designed specifically for Ford E-150 Econoline, E-150 Econoline Club Wagon, E-250 Econoline, E-250 Econoline Club Wagon, and F-250 models, this master cylinder ensures consistent brake pressure and vehicle safety.

• Master cylinder bore diameter: 1.063 inches for precise hydraulic control
• Constructed from durable cast iron for long-lasting performance
• Includes two outlets with rearward outlet size 1/2-20 and secondary outlet thread diameter 9/16-18
• Package contains the master cylinder only; reservoir and mounting hardware not included
• Compatible with Ford E-150 Econoline, E-150 Econoline Club Wagon, E-250 Econoline, E-250 Econoline Club Wagon, and F-250

Product Details and Specifications

The Dorman M39446 brake master cylinder is built with a 1.063-inch bore diameter, providing the correct hydraulic pressure needed for effective braking in Ford Econoline and F-Series trucks. Its cast iron construction offers strength and resistance to wear, ensuring durability under demanding driving conditions. This master cylinder features two outlets, including a rearward outlet sized at 1/2-20 and a secondary outlet with a 9/16-18 thread diameter, designed to fit the brake lines of the specified Ford models. Note that this unit does not include a reservoir or mounting hardware, so those components must be sourced separately if needed.

Common Applications and Problem Resolution

• Restores brake pressure loss caused by a failing master cylinder
• Eliminates spongy or unresponsive brake pedal feel
• Addresses internal leaks within the brake hydraulic system
• Replaces worn or corroded master cylinders in Ford E-150 and E-250 Econoline models
• Ensures proper brake fluid distribution to front and rear brakes on F-250 trucks

Installation Notes and Tips

Installation of the Dorman M39446 master cylinder requires careful attention to brake line connections and proper bleeding of the brake system to remove air. Since mounting hardware and reservoir are not included, verify compatibility with existing components before installation. It is recommended to inspect brake lines and related components for wear or damage during replacement. Professional installation is advised to ensure safety and optimal brake performance.

Quality Assurance and Warranty Information

Dorman manufactures the M39446 brake master cylinder to meet or exceed OEM specifications for Ford E-150 Econoline, E-250 Econoline, and F-250 models. The cast iron construction and precise bore diameter contribute to reliable brake system operation. While specific warranty details should be confirmed at the point of purchase, Dorman typically offers limited warranties covering defects in materials and workmanship.