Dorman M39447 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford and Lincoln Vehicles

The Dorman M39447 brake master cylinder is engineered to restore proper brake hydraulics in select Ford and Lincoln models. Designed with a durable cast iron construction and a 1.125-inch bore diameter, this master cylinder ensures consistent brake fluid pressure for safe stopping performance.

• Compatible with Ford Mustang, Lincoln Continental, and Mark VII models
• Cast iron master cylinder material for durability
• Includes reservoir for brake fluid storage
• Two outlet ports with rearward outlet size 9/16-18 and secondary outlet thread diameter 7/16-24
• Does not include mounting hardware or sensor

Product Features and Specifications

The Dorman M39447 master cylinder features a 1.125-inch bore diameter, which is critical for maintaining proper hydraulic pressure in the brake system. Constructed from cast iron, this part offers strength and resistance to wear. The included reservoir allows for brake fluid containment, while the two outlets provide connections for front and rear brake circuits. The rearward outlet size is 9/16-18, and the secondary outlet thread diameter is 7/16-24, matching OEM specifications for precise fitment. Note that mounting hardware and sensors are not included with this part.

Applications and Common Repair Uses

• Restores brake fluid pressure in Ford Mustang brake systems
• Replaces worn or leaking master cylinders in Lincoln Continental models
• Addresses brake pedal sinking or sponginess in Lincoln Mark VII vehicles
• Fixes internal leaks causing brake fluid loss
• Resolves inconsistent braking performance due to master cylinder failure

Installation Notes and Tips

Installation of the Dorman M39447 master cylinder requires proper brake system bleeding to remove air and ensure optimal brake function. Since mounting hardware is not included, retain or replace existing hardware as needed. Verify outlet thread sizes (9/16-18 rearward and 7/16-24 secondary) to ensure compatibility with brake lines. This part is designed for direct replacement on compatible Ford Mustang, Lincoln Continental, and Mark VII models.

Quality Assurance and Warranty Information

Dorman manufactures the M39447 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction provides durability under normal operating conditions. While mounting hardware and sensors are not included, the part is tested for reliable hydraulic performance. Warranty coverage details should be confirmed at the time of purchase.