Dorman M39700 Brake Master Cylinder

Reliable Brake Master Cylinder Replacement

The Dorman M39700 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: 0.813 inches for accurate hydraulic control
• Constructed from cast iron for strength and durability
• Includes three outlets with a rearward outlet size of M10 x 1.0 and secondary outlet thread diameter of 10 mm
• Thread pitch of 1.0 ensures secure fitting with brake lines
• Does not include reservoir or mounting hardware, sold as master cylinder only

Product Details and Specifications

The Dorman M39700 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 0.813-inch bore diameter allows for precise fluid displacement, critical for consistent brake pedal feel and response. Featuring three outlets, including a rearward outlet sized M10 x 1.0, this master cylinder accommodates multiple brake line connections. The thread pitch of 1.0 ensures compatibility with standard brake fittings. Note that this unit does not include a reservoir or mounting hardware, so those components must be sourced separately.

Compatible Vehicles and Applications

This brake master cylinder is suitable for replacement in various vehicle makes and models requiring a 0.813-inch bore diameter and matching outlet specifications. It is commonly used in brake hydraulic systems where a cast iron master cylinder with three outlets is specified. For example, it is compatible with certain Ford, Chevrolet, and Dodge models that require a master cylinder with these dimensions and thread sizes. Always verify fitment with your vehicle's service manual or parts guide before purchase.

• Restores proper brake fluid pressure and pedal feel
• Replaces worn or leaking master cylinders
• Addresses brake pedal sinking or sponginess
• Solves brake fluid leakage at master cylinder outlets
• Improves overall brake system reliability

Installation Notes and Tips

When installing the Dorman M39700 brake master cylinder, ensure the brake system is properly bled to remove air and maintain hydraulic integrity. Since mounting hardware and reservoir are not included, retain or replace these components as needed. Use compatible brake fluid and follow vehicle-specific torque specifications for outlet fittings. Inspect brake lines and connections for wear or damage during installation.

Quality Assurance and Warranty

Dorman manufactures the M39700 brake master cylinder to meet industry standards for durability and performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in materials and workmanship. Refer to Dorman's official warranty documentation for exact terms and conditions.