Supply hydraulic pressure to every wheel's brakes each time you press the pedal with the Dorman First Stop brake master cylinder M39388. This master cylinder is a direct-fit replacement for the 1983-1985 Ford Ranger and the 1984-1985 Ford Bronco II, all engines. It is precision-engineered to match the design, function and performance of the original master cylinder on the listed applications.
- Precise replacement: The cast iron cylinder housing is built to match the casting material of the original part and is intended to deliver similar performance.
- Durable design: All rubber components use a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: The unit is made entirely of new, high-quality materials.
- Strict specifications: Made to meet rigorous SAE International standards.
Specifications: cast iron housing, 0.938 in bore diameter, two outlets, 7/16-24 secondary outlet thread. A reservoir is included. A sensor and mounting hardware are not included, so consult the vehicle service information for the correct fasteners and whether they may be reused. Country of origin: China.
Signs a master cylinder may need replacing include a soft or spongy pedal, a pedal that slowly sinks under steady pressure, and brake fluid leaking from the unit. Diagnose the cause before replacing any part, and follow the vehicle's service procedure for installation and bleeding.
Interchange: 783-42028 · 83-42028 · 100-2469 · M-85028 · 13-1930 · 10-1930 · 130.65028 · 131.65028 · 355-54148
78342028 · 8342028 · 1002469 · M85028 · 131930 · 101930 · 13065028 · 13165028 · 35554148 · 18M205 · M900405 · 11930 · MC251820 · E3TZ2140A · M1930 · NM1930 · MC39388 · F106433 · MC106433
This part cross-references / interchanges with the following part numbers:
18M205, 783-42028, 83-42028, M900405, 100-2469, M-85028, 11930, 13-1930, 10-1930, 130.65028, 131.65028, MC251820, 355-54148, E3TZ2140A, M1930, NM1930, MC39388, F106433, MC106433
