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Dorman - First Stop Brake Master Cylinder P/N:M39173
$56.99
Turn brake-pedal force into the hydraulic pressure your brakes depend on with the Dorman - First Stop Brake Master Cylinder M39173. It installs as a direct-fit replacement for the 1980-1983 Ford F-250 and 1980-1983 Ford F-350 (engine: All), engineered to match the design, function, and performance of the original master cylinder on those applications and built from new, high-quality materials for a safe, durable service part.
- Cast-iron housing: the cylinder housing is constructed to match the casting material of the original part for similar performance.
- Durable rubber: all rubber components are made of high-quality EPDM compound for resistance to glycol-based brake fluid.
- 100% new: made entirely from new materials, not remanufactured.
- Built to spec: made to meet rigorous SAE International standards.
This unit has a 1.063 in bore and two outlets (rearward outlet 3/8-24 in, secondary outlet thread 7/16-24 in), and includes the fluid reservoir. No sensor and no mounting hardware are included — consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: China.
Interchange: 18M115 · 783-42047 · 78342047 · 83-42047 · 8342047 · M900307 · 100-2498 · 1002498 · M-85047 · M85047 · 11856 · 13-1856 · 131856 · 10-1856 · 101856 · 130.65047 · 131.65047 · MC102421 · 355-54166 · 35554166 · E0TZ2140B · 102421 · M1856 · NM1856 · 2539173 · MC39173 · F102421
Manufacturer part number M39173.
This part cross-references / interchanges with the following part numbers:
18M115, 783-42047, 83-42047, M900307, 100-2498, M-85047, 11856, 13-1856, 10-1856, 130.65047, 131.65047, MC102421, 355-54166, E0TZ2140B, 102421, M1856, NM1856, 2539173, MC39173, F102421
Frequently Asked Questions
What does this master cylinder do?
It converts the force from your brake pedal into hydraulic pressure that is sent to the brakes at each wheel, so it is central to the hydraulic brake system.
Will this fit my vehicle?
It is a direct-fit replacement for the 1980-1983 Ford F-250 and 1980-1983 Ford F-350 (engine: All). Check the Buyer's Guide tab to confirm the match for your vehicle.
Does it include a reservoir, sensor, or mounting hardware?
The fluid reservoir is included. A sensor is not included and no mounting hardware is included; consult the vehicle service information for the correct fasteners.
What is it made of?
The cylinder housing is cast iron, constructed to match the casting material of the original part, and the rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
Is this new or remanufactured?
It is 100% new, made entirely from new materials and not remanufactured, and made to meet SAE International standards.
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Dorman
Dorman - First Stop Brake Master Cylinder P/N:M39173
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