Turn every press of the pedal into steady hydraulic pressure with the Dorman brake master cylinder M630277 from Dorman - First Stop. It fits many vehicles, among them the 1999-2000 Ford F-53 Motorhome Chassis, 1999-2001 Freightliner FL50 and 1999-2001 Freightliner FL60, as a direct-fit replacement; see the "Vehicles it fits" section for the full list. The listed applications use one unit each.
Precision-engineered to mirror the original master cylinder's design, function and performance, this unit 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: Every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: Made entirely of new materials, with quality and safety in mind.
- Strict specifications: Made to meet rigorous SAE International standards.
Specifications: The bore diameter is 2 in, with two outlets and a 1/2-20 secondary outlet thread. The reservoir is included. Mounting hardware and a sensor are not included. Country of origin: China.
Signs a master cylinder may need replacing include a soft or sinking brake pedal, fluid seeping from the cylinder, or a brake fluid level that keeps dropping. Other hydraulic components can cause the same symptoms, so diagnose the cause before replacing.
Interchange: 100-2759 · 13-8039 · 10-8039 · 130.79031 · 355-54299
1002759 · 138039 · 108039 · 13079031 · 35554299 · M901088 · F81Z2140AA · MC390590 · F140488 · MC140488
This part cross-references / interchanges with the following part numbers:
M901088, 100-2759, 13-8039, 10-8039, 130.79031, 355-54299, F81Z2140AA, MC390590, F140488, MC140488
Frequently Asked Questions
Does this include a Dorman master cylinder bleeder kit?
No. The package contains the master cylinder with its reservoir; a bleeder kit, mounting hardware and a sensor are not included.
Which vehicles does M630277 fit?
It fits many vehicles, including the 1999-2000 Ford F-53 Motorhome Chassis, 1999-2001 Freightliner FL50 and 1999-2001 Freightliner FL60. See the "Vehicles it fits" section for the full list.
What is the master cylinder housing made of?
The cylinder housing is cast iron. All rubber components use a high-quality EPDM compound designed to resist glycol-based brake fluid.
What are the key specifications?
It has a 2 in bore diameter, two outlets and a 1/2-20 secondary outlet thread. The fluid reservoir is included.
What are signs a master cylinder may need replacing?
A soft or sinking pedal, fluid leaking at the cylinder, or a steadily dropping fluid level can be signs, but diagnose first because other brake components can cause similar symptoms.
