Dorman M630551 brake master cylinder for the 2005-2006 Ford F-250 Super Duty and other vehicles turns pedal force into hydraulic pressure for the brakes. This Dorman brake master cylinder is a new part made to follow the original's design and function on specific vehicle years and models.
- Part of the Dorman First Stop line
- Aluminum cylinder housing, constructed to match the casting material of the original part
- All rubber components are EPDM compound for resistance to glycol-based brake fluid
- Made entirely of new materials
- Built to meet rigorous SAE International standards
Quick facts
- Part: Dorman M630551 brake master cylinder
- Fits: 2005-2006 Ford F-250 Super Duty and other vehicles
- Material: Aluminum
- Condition: New
A soft or sinking brake pedal, fluid residue around the cylinder body or a brake warning light can mean the master cylinder is failing. Worn pads, a leaking caliper or brake line, or air in the system can produce a soft pedal too, so track down the source before you buy.
Fits
The 2005-2006 Ford F-250 Super Duty, the 2005-2006 Ford F-350 Super Duty and the 2005-2006 Ford F-450 Super Duty take this master cylinder, and so do more vehicles. Look up your own truck in the "Vehicles it fits" section. This listing is one master cylinder, and each truck takes one.
Specifications
Fit and size
- Quantity per vehicle: 1
- Number of outlets: 3
- Bore diameter: 1.313 in
- Rearward outlet size: M10 x 1.0
- Secondary outlet thread diameter: M12 X 1.0 & 3/8-24
Build and materials
- Material: Aluminum
- Condition: New
- Country of origin: China
In the box
One brake master cylinder with its reservoir and sensor. Mounting hardware is not included, so plan on new bolts and fasteners rather than reusing the old ones.
Interchange: 100-4303 · 13-3222 · 10-3251 · 130.65098 · 355-54214 · BRMC-31
14074 · 5C3Z2140BA · 6C3Z2140BB · 6C3Z2140BF · NM4114 · MC390957 · F142429 · MC142429 · R134998
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
100-4303, 14074, 13-3222, 10-3251, 130.65098, 355-54214, 5C3Z2140BA, 6C3Z2140BB, 6C3Z2140BF, NM4114, BRMC-31, MC390957, F142429, MC142429, R134998
Frequently Asked Questions
Is Dorman M630551 the right 2005-2006 Ford F-350 Super Duty brake master cylinder?
Yes, Dorman M630551 fits the 2005-2006 Ford F-350 Super Duty, which takes one; for any other truck, look in the "Vehicles it fits" section.
What is the Dorman master cylinder made of?
The Dorman M630551 housing is aluminum, and all of its rubber components are EPDM compound for resistance to glycol-based brake fluid.
Does this master cylinder come with the reservoir and sensor?
Yes, the reservoir and the sensor are included. Mounting hardware is not, so plan on new bolts and fasteners.
What are the outlet sizes and bore on this master cylinder?
It has 3 outlets. The rearward outlet is M10 x 1.0, the secondary outlet threads are M12 x 1.0 and 3/8-24, and the bore diameter is 1.313 in.
How can I look for a leaking brake master cylinder?
With the engine off, look for wet fluid residue around the cylinder body and a reservoir level that keeps dropping. For pedal feel or pressure tests, have a shop check it promptly.
