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Dorman - First Stop Brake Master Cylinder P/N:M661
$117.99
Convert brake-pedal force into the hydraulic pressure that operates the brakes with the Dorman First Stop Brake Master Cylinder M661. It drops in as a direct-fit replacement for 1980-1983 INTERNATIONAL S1723, 1980-1982 S1823, 1980 S1824, 1981-1983 S1724, 1981-1983 S1853 and 1981-1983 S1854, and 1982-1983 S1754 (engine: All) — see the Buyer's Guide tab for the full list.
This 100% new unit is precision-built to match the original's design, function and performance, so it installs and behaves like the factory master cylinder on the listed applications.
- 100% new: made entirely of new materials, not remanufactured.
- Cast iron housing: constructed to match the casting material of the original part for similar performance.
- Durable seals: the rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- Built to spec: made to meet rigorous SAE International standards.
Specs: 1.5 in bore diameter, 2 outlets with (2) 1/2-20 rearward outlet sizes, and an included reservoir; no integrated sensor. Mounting hardware is not included — consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: Taiwan.
Manufacturer part number M661.
Frequently Asked Questions
What does this brake master cylinder do?
It converts the force applied at the brake pedal into hydraulic pressure that operates the vehicle's brakes. The M661 is a direct-fit replacement for the listed INTERNATIONAL trucks.
Is the reservoir included?
Yes. The Reservoir Included attribute is Yes, so this master cylinder comes with its reservoir. It does not include an integrated sensor.
Is mounting hardware included?
No. Mounting hardware is not included. Consult the vehicle service information for the correct fasteners and whether they may be reused.
What is the bore size and outlet configuration?
It has a 1.5 in bore diameter and 2 outlets, with (2) 1/2-20 rearward outlet sizes.
Is this a remanufactured part?
No. It is 100% new, made entirely of new materials rather than remanufactured, and made to meet rigorous SAE International standards.
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Dorman
Dorman - First Stop Brake Master Cylinder P/N:M661
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