Dorman - First Stop Brake Master Cylinder P/N:M630623
Shopping for a Dorman master cylinder bleeder kit for a brake job? Start with the component that turns pedal effort into hydraulic brake pressure: the Dorman - First Stop Brake Master Cylinder M390249. It is a direct-fit replacement for the 1994-1996 Chevrolet Caprice, 1995-1996 Buick Roadmaster and 1995-1996 Cadillac Fleetwood (engine: All), one per vehicle.
This Dorman brake master cylinder is precision-engineered to mirror the design, function and performance of the original unit on the listed applications. It is built from new, high-quality materials for a safe, durable replacement.
Specifications: Two outlets; reservoir included; sensor and mounting hardware not included. Package contents: master cylinder. Country of origin: China.
Signs a master cylinder may need replacing include a soft or slowly sinking brake pedal, fluid seeping at the cylinder, or a reservoir that keeps losing fluid. Diagnose the cause before replacing, because other brake components can produce similar symptoms.
Interchange: 174-724 · 783-36081 · 83-36081 · M-82081 · 13-2686 · 10-2686 · 130.62081 · 131.62081
18M708 · M900944 · 13264 · MC252500 · 18021270 · 18029966 · M2686 · NM2686 · MC390249 · F131389 · MC131389 · 174724 · 78336081 · 8336081 · M82081 · 132686 · 102686 · 13062081 · 13162081
This part cross-references / interchanges with the following part numbers:
Is the reservoir included with this master cylinder?
Yes, the reservoir is included. A sensor and mounting hardware are not, so consult the vehicle service information for the correct fasteners and whether the originals may be reused.
Which vehicles does this brake master cylinder fit?
It is listed for the 1994-1996 Chevrolet Caprice, the 1995-1996 Buick Roadmaster and the 1995-1996 Cadillac Fleetwood (engine: All), with one used per vehicle.
What are the rubber components made of?
All rubber components are made of a high-quality EPDM compound for resistance to glycol-based brake fluid.
What are the signs a brake master cylinder may need replacing?
A soft or slowly sinking pedal, fluid seeping at the cylinder, or a reservoir that keeps losing fluid may be signs. Diagnose the cause first, because other brake parts can cause similar symptoms.
Does this master cylinder need to be bled?
Yes. Replacing a master cylinder opens the hydraulic system, so follow the vehicle service procedure for bleeding the new master cylinder and the brake system.
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.