Put a new source of hydraulic brake pressure behind the pedal with the Dorman First Stop Brake Master Cylinder, part number M390391. It turns pedal force into hydraulic pressure for the brake circuits. It is a direct-fit replacement for the 1997-1998 Ford E-350 Econoline (engine: All) and the 1997-1998 Ford Econoline Super Duty (engine: All). Dorman engineers this unit to mirror the design, function and performance of the original master cylinder on the listed vehicles. It is built from new, high-quality materials for a safe, durable replacement.
- Precise replacement: the aluminum cylinder housing is built to match the original part's housing material, for similar performance.
- Durable design: every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: made entirely of new materials, for high quality and safety.
- Strict specifications: built to rigorous SAE International standards.
Specifications: 1.25 in. bore diameter, two outlets, and a 7/16-24 rearward outlet size. The reservoir and sensor are included. Mounting hardware is not included. Country of origin: Taiwan.
Signs that a master cylinder may need replacing include a soft or sinking brake pedal, brake fluid leaking at the cylinder, or an illuminated brake warning light. Diagnose the cause first. If the master cylinder is at fault, M390391 replaces it. Follow the vehicle service information for installation and bleeding.
Interchange: 83-42051 · 100-2502 · M-85051 · 13-2797 · 10-2797 · 130.65051 · 130.65093 · 131.65093 · BRMC-46
8342051 · 1002502 · M85051 · 132797 · 102797 · 13065051 · 13065093 · 13165093 · BRMC46 · 18M811 · M901046 · 13280 · 13284 · 13497 · MC252250 · F7UZ2140EB · NM3032 · MC390391 · F140661 · MC140661
This part cross-references / interchanges with the following part numbers:
18M811, 83-42051, M901046, 100-2502, M-85051, 13280, 13284, 13497, 13-2797, 10-2797, 130.65051, 130.65093, 131.65093, MC252250, F7UZ2140EB, NM3032, BRMC-46, MC390391, F140661, MC140661
