Dorman M630742 Brake Master Cylinder

Reliable Brake Master Cylinder Replacement

The Dorman M630742 brake master cylinder is engineered to restore proper brake hydraulics performance in compatible vehicles. Designed with a durable cast iron construction and precise bore diameter, this master cylinder supports consistent brake fluid pressure for safe stopping power.

• Master cylinder bore diameter: 1.125 inches for accurate fluid displacement
• Constructed from cast iron for strength and durability
• Includes two outlets with a rearward outlet size of M10 x 1.0 and 10mm secondary outlet thread diameter
• Thread pitch of 1.0 ensures secure hydraulic connections
• Package contains the master cylinder only; reservoir and mounting hardware not included

Product Details and Specifications

The Dorman M630742 brake master cylinder is designed to meet or exceed OEM specifications for brake hydraulics. Its cast iron material provides resistance to wear and corrosion, essential for maintaining brake system integrity. The 1.125-inch bore diameter allows for precise hydraulic pressure control, critical for vehicles requiring reliable brake response. Featuring two outlets, including a rearward outlet sized M10 x 1.0, this master cylinder supports dual-circuit brake systems commonly found in many passenger cars and light trucks. The 10mm secondary outlet thread diameter and 1.0 thread pitch ensure compatibility with standard brake line fittings.

Common Applications and Problem Resolution

• Restores brake fluid pressure in vehicles experiencing spongy or unresponsive brake pedals
• Replaces worn or leaking master cylinders causing brake fluid loss
• Addresses brake system failure due to internal seal wear or corrosion
• Improves brake pedal feel and consistency in compatible makes and models
• Supports maintenance of dual-circuit brake systems requiring two outlet connections

Installation Notes and Tips

When installing the Dorman M630742 brake master cylinder, ensure the brake fluid reservoir is compatible and properly connected, as this unit does not include a reservoir. Bleed the brake system thoroughly after installation to remove air and restore hydraulic pressure. Verify that brake line fittings match the M10 x 1.0 rearward outlet and 10mm secondary outlet thread diameters to ensure leak-free connections. Use appropriate tools to avoid damaging the cast iron body or threads during installation.

Quality Assurance and Warranty

Dorman manufactures the M630742 brake master cylinder to meet industry standards for durability and performance. While specific warranty details are not provided, Dorman products typically undergo rigorous quality control to ensure reliability in brake hydraulics applications. For exact warranty information, refer to Dorman's official documentation or contact the manufacturer directly.