Dorman M639013 Brake Master Cylinder

Reliable Brake Master Cylinder Replacement for Your Vehicle

The Dorman M639013 brake master cylinder is engineered to restore proper brake hydraulics performance in compatible vehicles. Designed with a durable cast iron construction, this master cylinder ensures consistent braking pressure and reliable operation.

• Master cylinder bore diameter: 0.938 inches for precise hydraulic control
• Constructed from cast iron for strength and durability
• Includes two outlets with rearward outlet size M10 x 1.0 and secondary outlet thread diameter M12 x 1.0
• Does not include reservoir or sensor, allowing compatibility with existing components
• Package contains the master cylinder only, no mounting hardware included

Detailed Product Description

The Dorman M639013 brake master cylinder is designed to meet or exceed OEM specifications for brake hydraulics. Its 0.938-inch bore diameter provides the correct hydraulic pressure needed for effective braking response. Manufactured from cast iron, this master cylinder offers resistance to wear and corrosion, contributing to long service life. The unit features two outlets: a rearward outlet sized M10 x 1.0 and a secondary outlet with a thread diameter of M12 x 1.0 and a 1.0 thread pitch, ensuring compatibility with specific brake line fittings. This part does not include a reservoir or sensor, making it suitable for vehicles that retain their original components. The Dorman M639013 is a direct replacement part designed for vehicles requiring this exact specification.

Common Applications and Issues Addressed

• Restores brake pressure in vehicles experiencing soft or spongy brake pedal feel
• Replaces master cylinders with internal leaks or fluid contamination
• Addresses brake failure symptoms caused by worn or damaged master cylinders
• Suitable for vehicles requiring a 0.938-inch bore diameter master cylinder
• Compatible with brake systems using M10 x 1.0 and M12 x 1.0 outlet fittings

Installation Notes and Tips

• Ensure compatibility with your vehicle’s brake system before installation
• Bleed the brake system thoroughly after installation to remove air
• Check existing brake lines for wear or damage and replace if necessary
• Use proper tools to avoid damaging outlet threads during installation
• Verify that the reservoir and sensor components are compatible and in good condition

Quality Assurance and Warranty

Dorman manufactures the M639013 brake master cylinder to meet industry standards for durability and performance. While mounting hardware is not included, the part is designed for direct fitment and reliable operation. Please consult Dorman’s warranty policy for specific coverage details related to this brake master cylinder.