Dorman M630944 Brake Master Cylinder

Reliable Brake Master Cylinder for Ram ProMaster Vehicles

The Dorman M630944 Brake Master Cylinder is engineered to restore proper brake hydraulics in Ram ProMaster 1500, 2500, 3500, and ProMaster Rapid models. Designed with durable cast iron and equipped with a removable reservoir, this master cylinder ensures consistent braking performance and safety.

• Master cylinder bore diameter: 1.0625 inches for precise hydraulic pressure
• Constructed from cast iron for strength and durability
• Includes a removable reservoir for easy maintenance
• Equipped with a sensor to monitor brake fluid levels
• Two outlets with M12 x 1.0 thread size for secure connections
• Rearward outlet and secondary outlet both sized M12 x 1.0 with 1.0 thread pitch
• Package contains the master cylinder unit only

Detailed Product Description

The Dorman M630944 Brake Master Cylinder is specifically designed for Ram ProMaster 1500, 2500, 3500, and ProMaster Rapid models, providing a direct replacement for the original equipment. Its 1.0625-inch bore diameter allows for accurate hydraulic pressure control, essential for effective braking. The cast iron construction offers long-lasting durability under demanding driving conditions. The included removable reservoir simplifies brake fluid inspection and replacement, while the integrated sensor helps monitor fluid levels to maintain optimal brake system performance. Featuring two outlets with standardized M12 x 1.0 threads, this master cylinder ensures compatibility with existing brake lines and fittings.

Common Applications and Problem Resolution

• Restores brake pressure in Ram ProMaster vehicles experiencing spongy or unresponsive brakes
• Replaces leaking or damaged master cylinders causing brake fluid loss
• Addresses brake warning light activation due to faulty fluid level sensors
• Improves brake system reliability after reservoir damage or contamination
• Supports maintenance and repair of brake hydraulics in commercial and fleet Ram ProMaster vans

Installation Notes and Tips

• Ensure brake fluid system is properly bled after installation to remove air pockets
• Verify compatibility with Ram ProMaster 1500, 2500, 3500, and ProMaster Rapid before installation
• Use appropriate tools for M12 x 1.0 threaded outlets to avoid damage
• Inspect brake lines and fittings for wear or damage during replacement
• Follow vehicle manufacturer torque specifications for mounting and outlet fittings

Quality Assurance and Warranty

Dorman manufactures the M630944 Brake Master Cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction and integrated sensor are tested for durability and reliability in brake hydraulic systems. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake components to ensure customer confidence and product performance.