Dorman M39712 Brake Master Cylinder

Reliable Brake Master Cylinder for Dodge D-Series and W-Series Trucks

The Dorman M39712 Brake Master Cylinder is engineered to restore proper brake hydraulics for Dodge D250, D350, W200, W250, W300, and W350 models. Designed with durable cast iron and a 1.125-inch bore diameter, this master cylinder ensures consistent brake fluid pressure and reliable stopping power.

• Master cylinder bore diameter: 1.125 inches for precise hydraulic control
• Constructed from cast iron for long-lasting durability
• Includes reservoir for brake fluid storage
• Two outlet ports with rearward outlet size 1/2-20 and secondary outlet thread diameter 9/16-18
• Compatible with Dodge D250, D350, W200, W250, W300, and W350 trucks
• Part number M39712 for accurate replacement

Durable Construction and Precise Hydraulic Design

This brake master cylinder features a cast iron body that withstands the rigors of daily driving and harsh conditions. The 1.125-inch bore diameter is calibrated to provide consistent hydraulic pressure, ensuring effective brake pedal feel and stopping performance. The included reservoir allows for proper brake fluid containment and circulation, while the two outlet ports accommodate the brake lines for front and rear brakes. The rearward outlet size of 1/2-20 and secondary outlet thread diameter of 9/16-18 match factory specifications for a direct fit on compatible Dodge trucks.

Compatible Dodge Models and Applications

The Dorman M39712 is specifically designed for use with Dodge D250, D350, W200, W250, W300, and W350 trucks. This master cylinder is ideal for restoring brake hydraulics on these models, ensuring safe and reliable braking performance.

• Restores proper brake fluid pressure and pedal feel
• Replaces worn or leaking master cylinders
• Addresses brake fluid reservoir leaks or damage
• Solves inconsistent or spongy brake pedal issues
• Prevents brake system failure due to master cylinder wear

Installation Notes and Tips

Installation requires removal of the old master cylinder and proper bleeding of the brake system to remove air. Ensure brake fluid levels are maintained and use compatible brake fluid as specified by the vehicle manufacturer. This master cylinder does not include mounting hardware, so retain original fasteners or source replacements as needed. Verify outlet thread sizes (1/2-20 rearward and 9/16-18 secondary) to ensure compatibility with brake lines.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM specifications for fit and function. The cast iron construction and precise bore diameter contribute to reliable brake system performance. While specific warranty details are not provided, Dorman products typically come with a limited warranty against defects in materials and workmanship.