Dorman M39445 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford E-250, E-350, F-250, and F-350

The Dorman M39445 brake master cylinder is engineered to restore proper brake hydraulics in select Ford trucks and vans. Designed specifically for Ford E-250 Econoline, E-350 Econoline, F-250, and F-350 models, this master cylinder ensures consistent brake fluid pressure and reliable stopping power.

• Master cylinder bore diameter: 1.125 inches for precise hydraulic control
• Constructed from durable cast iron for long-lasting performance
• Includes reservoir for brake fluid storage and easy maintenance
• Two outlet ports with rearward outlet size of 3/8-24 inches and secondary outlet thread diameter of 7/16-24 inches
• Package contains the master cylinder unit only; mounting hardware not included

Detailed Product Description

The Dorman M39445 brake master cylinder is built with a cast iron body to withstand the rigors of daily driving and heavy-duty use. Its 1.125-inch bore diameter is calibrated to provide optimal hydraulic pressure for the brake system. The included reservoir simplifies brake fluid management, while the two outlet ports accommodate standard brake line fittings with rearward and secondary outlet thread sizes of 3/8-24 and 7/16-24 inches respectively. This master cylinder is designed for direct compatibility with Ford E-250 Econoline, E-250 Econoline Club Wagon, E-350 Econoline, E-350 Econoline Club Wagon, F-250, and F-350 models, ensuring a precise fit and reliable brake performance.

Common Applications and Issues Addressed

• Restores brake fluid pressure in Ford E-250 and E-350 Econoline vans
• Replaces worn or leaking master cylinders in Ford F-250 and F-350 trucks
• Eliminates spongy or unresponsive brake pedal feel
• Prevents brake fluid leaks that can compromise braking safety
• Resolves inconsistent brake performance due to master cylinder failure

Installation Notes and Tips

Installation requires removal of the old master cylinder and proper bleeding of the brake system to remove air. Ensure brake lines match the 3/8-24 and 7/16-24 outlet thread sizes for a secure connection. Since mounting hardware is not included, retain or source appropriate fasteners for your specific vehicle model. Follow manufacturer torque specifications and safety procedures during installation.

Quality Assurance and Warranty

Dorman manufactures the M39445 brake master cylinder to meet or exceed OEM standards for fit and function. The cast iron construction provides durability under demanding conditions. While specific warranty details are not provided here, Dorman products typically come with a limited warranty against defects in materials and workmanship. Verify warranty terms with the product documentation or supplier.