Turn pedal effort into hydraulic pressure for your brakes with the Dorman First Stop Brake Master Cylinder, part number M83579. It fits many vehicles, among them the 1967-1975 Ford F-250, 1969-1974 Ford E-100 Econoline and 1969-1974 Ford E-200 Econoline, as a direct-fit replacement for the listed applications with all engines. See the "Vehicles it fits" section for the full list.
Dorman precision-engineers this master cylinder to match the design, function and performance of the original unit on the listed applications. It is built from new, high-quality materials for a safe, durable replacement.
- Precise replacement: The cast iron cylinder housing is built to match the casting material of the original part for similar performance.
- Durable design: All rubber components use a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: Made entirely from new materials for quality and safety.
- Strict specifications: Made to meet rigorous SAE International standards.
Specifications: 1 in bore diameter, two outlets and a 1/2-20 rearward outlet size. A reservoir is included. A sensor and mounting hardware are not included, so consult the vehicle service information for the correct fasteners and whether they may be reused.
Signs a master cylinder may need replacing include a soft or sinking brake pedal and brake fluid leaking at the cylinder. Diagnose the brake system before replacing parts. Country of origin: China.
Product information is for general reference and may contain errors. See our Disclaimer.
Frequently Asked Questions
Will this Ford F-250 master cylinder fit my 1967-1975 truck?
Yes. It is listed as a direct-fit replacement for the 1967-1975 Ford F-250 with all engines. The "Vehicles it fits" section shows the full list of vehicles it fits.
What comes in the box?
The package contains the master cylinder with a reservoir. A sensor and mounting hardware are not included, so consult the vehicle service information for the correct fasteners.
What are the bore and outlet specifications?
It has a 1 in bore diameter, two outlets and a 1/2-20 rearward outlet size. The cylinder housing is cast iron.
What are signs a brake master cylinder may need replacing?
A soft or sinking brake pedal, or brake fluid leaking at the master cylinder, can be signs. Diagnose the brake system first, because these symptoms can have other causes.
Does the brake system need bleeding after installation?
Yes. A master cylinder is normally bench-bled before installation, and the brake system is bled afterward. Follow the vehicle's service procedure.
