Dorman M630974 brake master cylinder for the 1953-1955 Chevrolet Truck and other vehicles converts pedal force into fluid pressure that applies the brakes. This Dorman brake master cylinder is engineered to follow the design, function and performance of the original cylinder for specific years, makes and models.
- Part of the Dorman First Stop line
- Cast iron cylinder housing built to match the casting material of the original part
- All rubber components are made of an EPDM compound for resistance to glycol-based brake fluid
- 100% new, made entirely of new materials
- Made to meet rigorous SAE International standards
Quick facts
- Part: Dorman M630974 brake master cylinder
- Fits: 1953-1955 Chevrolet Truck and other vehicles
- Material: Cast iron
- Condition: New
A soft or sinking brake pedal, or brake fluid leaking near the cylinder, can mean the master cylinder is worn, though a leaking brake line or a worn caliper can be behind the same signs. If the master cylinder is the cause, this one replaces it.
Fits
The 1953-1955 Chevrolet Truck, the 1951-1954 GMC 100 and the 1951-1954 GMC 100-22 are among the vehicles this master cylinder fits, along with many more, with one cylinder per vehicle. To see whether your own model and engine are covered, open the "Vehicles it fits" section.
Specifications
Fit and size
- Quantity per vehicle: 1
- Bore diameter: 1.125 in
- Rearward outlet size: 7/16-24 in
- Pedal rod ID: 9 mm
- Mounting holes: 2
Build and materials
- Material: Cast iron
- Reservoir: single, included
- Push rod: included
- Cap: included
- Condition: New
- Country of origin: Taiwan
In the box
One brake master cylinder with its reservoir, cap and push rod. Mounting hardware, a mounting bracket, a sensor, bleeder hoses and a brake booster are not included, so plan on new mounting hardware.
Interchange: 13-14484 · 10-14484 · 130.66040 · 355-47167
MC14484
This part cross-references / interchanges with the following part numbers:
13-14484, 10-14484, 130.66040, 355-47167, MC14484
Frequently Asked Questions
Is this truck brake master cylinder right for the 1953-1955 Chevrolet Truck?
Yes. Dorman M630974 fits the 1953-1955 Chevrolet Truck and takes one per truck. For another model, use the "Vehicles it fits" section to look up your own vehicle and engine.
What comes with the Dorman master cylinder, and is the reservoir included?
Yes, the reservoir is included, along with the cap and push rod. Mounting hardware, a mounting bracket, a sensor, bleeder hoses and a brake booster are not included.
What are the bore size and outlet size of this single-reservoir master cylinder?
Dorman M630974 has a 1.125 in bore and a 7/16-24 in rearward outlet. The housing is cast iron, and the pedal rod ID is 9 mm.
Which signs can point to a worn master cylinder with a single reservoir?
A soft or sinking pedal, or fluid leaking at the cylinder, can mean it is worn. Look for leaks with the engine off and have the brakes checked promptly; a shop can test the hydraulics.
Are the rubber parts in this Dorman M630974 resistant to brake fluid?
Yes. All rubber components in Dorman M630974 are made of an EPDM compound for resistance to glycol-based brake fluid.
