Dorman - First Stop Brake Master Cylinder P/N:M630031
Turn pedal effort into hydraulic braking pressure with the Dorman First Stop Brake Master Cylinder M71265. It is a direct-fit replacement master cylinder for the 1968-1975 Ford Bronco and the 1968-1975 Ford F-100 with all engines. Dorman designed this unit to match the design, function and performance of the original master cylinder, and it is built from new, high-quality materials for a safe, durable replacement.
Specifications: 1 in. bore diameter, two outlets and a 1/2-20 rearward outlet size. The reservoir is included. No sensor and no mounting hardware are included. Consult the vehicle service information for the correct fasteners and whether the originals may be reused.
In the box: One master cylinder. Country of origin: China.
Product information is for general reference and may contain errors. See our Disclaimer.
Is this the right master cylinder for a 1968-1975 Ford Bronco?
It is listed for the 1968-1975 Ford Bronco and the 1968-1975 Ford F-100 with all engines. Check the "Vehicles it fits" section to confirm your vehicle.
What does a brake master cylinder do?
It converts force from the brake pedal into hydraulic pressure and sends brake fluid to the brake lines. This unit has two outlets and a 1 in. bore.
What is included in the box?
One master cylinder with the reservoir included. Mounting hardware and a sensor are not included.
What are signs the master cylinder may need replacing?
Signs include a spongy or sinking brake pedal, fluid leaking at the master cylinder, or a dropping fluid level. Other brake faults can cause similar symptoms, so diagnose the cause first.
Does it need to be bled after installation?
Yes. Master cylinders are typically bench-bled before installation, and then the brake system is bled. Follow the vehicle service information for the procedure and the correct brake fluid.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.