Dorman M630157 Brake Master Cylinder

Reliable Brake Master Cylinder for Dodge Ram 2500 and 3500

The Dorman M630157 Brake Master Cylinder is engineered to restore proper brake hydraulics in Dodge Ram 2500 and Ram 3500 trucks. Designed with precision, this aluminum master cylinder includes a reservoir and features dual outlets to ensure consistent brake fluid delivery.

Key Features of Dorman M630157 Brake Master Cylinder

• Master cylinder bore diameter: 1.25 inches for optimal hydraulic pressure
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir for brake fluid storage
• Two outlets with rearward outlet size M10 x 1.0 and secondary outlet thread diameter M12 x 1.0
• Thread pitch of 1.0 for secure fitting
• Package contains the master cylinder only; mounting hardware not included

Detailed Product Description

This Dorman brake master cylinder (part number M630157) is specifically designed for Dodge Ram 2500 and Ram 3500 models, providing a direct replacement for the original equipment. The 1.25-inch bore diameter ensures proper hydraulic pressure is maintained for effective braking performance. Made from aluminum, the master cylinder offers enhanced durability and resistance to corrosion, extending the service life of your brake system. The included reservoir allows for adequate brake fluid capacity, while the two outlets with precise thread sizes (M10 x 1.0 rearward outlet and M12 x 1.0 secondary outlet) facilitate proper brake line connections. Note that mounting hardware is not included, so existing hardware should be reused or sourced separately.

Common Brake Issues Addressed by This Master Cylinder

• Spongy or soft brake pedal feel due to master cylinder wear
• Brake fluid leaks from a failing or cracked master cylinder
• Reduced braking efficiency caused by internal seal failure
• Brake warning light activation related to hydraulic pressure loss
• Uneven brake application affecting vehicle control

Installation Notes and Tips

• Ensure compatibility with Dodge Ram 2500 and Ram 3500 models before installation
• Bleed the brake system thoroughly after installation to remove air pockets
• Reuse existing mounting hardware or acquire appropriate fasteners as they are not included
• Inspect brake lines and fittings for wear or damage during replacement
• Follow manufacturer torque specifications for outlet fittings to prevent leaks

Quality Assurance and Warranty Information

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction provides corrosion resistance and durability under demanding conditions. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship. Refer to Dorman’s official warranty policy for complete terms.