Dorman M630790 Brake Master Cylinder

Reliable Brake Master Cylinder for Precise Hydraulic Control

The Dorman M630790 brake master cylinder is engineered to provide consistent brake hydraulics performance for vehicles requiring a 1.25-inch bore diameter. Designed with an integrated brake booster, this aluminum master cylinder ensures efficient braking response and durability for various automotive applications.

• Includes master cylinder and bleeder kit for maintenance convenience
• Constructed from durable aluminum for corrosion resistance
• Features a 1.25-inch bore diameter for precise hydraulic pressure
• Equipped with two outlets and a remote reservoir type for flexible installation
• Brake booster included to enhance braking power and pedal feel
• Four mounting holes for secure attachment
• Secondary outlet thread diameter of 10 mm with 1.0 thread pitch

Technical Details and Construction

The Dorman M630790 master cylinder is crafted from aluminum, providing a lightweight yet robust component that resists corrosion and wear. It features a 1.25-inch bore diameter, which is critical for maintaining proper hydraulic pressure in the brake system. The unit includes a brake booster to assist in reducing pedal effort, improving driver control and safety. With two outlets and a remote reservoir design, this master cylinder supports flexible brake line routing and system configurations. The rearward outlet size is M10 x 1.0, matching common brake line fittings for straightforward integration.

Applications and Problem Resolution

This brake master cylinder is suitable for vehicles requiring a 1.25-inch bore diameter and compatible brake booster integration. It addresses several common brake system issues, including:

• Brake pedal sinking or sponginess due to master cylinder wear
• Reduced braking efficiency from internal leaks or seal failure
• Brake fluid contamination or reservoir malfunction with remote reservoir setups
• Inconsistent brake booster performance affecting pedal feel
• Corrosion-related master cylinder body degradation

Installation Notes and Tips

Installation of the Dorman M630790 requires attention to proper mounting using the four provided mounting holes. Since mounting hardware is not included, ensure you have the correct bolts and tools for your specific vehicle application. Bleeding the brake system thoroughly after installation is essential to remove air and ensure optimal hydraulic function. The included bleeder kit facilitates this process. Verify compatibility with your vehicle’s brake line fittings, especially the M10 x 1.0 rearward outlet thread size.

Quality Assurance and Warranty

Dorman manufactures the M630790 brake master cylinder to meet or exceed OEM specifications, using quality materials and precise engineering. While specific warranty details are not provided here, Dorman products typically come with a limited warranty covering defects in materials and workmanship. For exact warranty terms, consult the product documentation or manufacturer resources.