Dorman M390016 Brake Master Cylinder

Overview of Dorman Brake Master Cylinder M390016

The Dorman Brake Master Cylinder M390016 is designed specifically for Volvo 740, 760, and 780 models. Engineered with cast iron construction, this master cylinder ensures reliable brake hydraulics performance for your classic Volvo vehicle.

• Compatible with Volvo 740, 760, and 780 models
• Cast iron master cylinder material for durability
• Dual bore diameters: 0.75 inch and 0.875 inch
• Three outlet ports with rearward outlet size M10 x 1.0 and 10mm secondary outlet thread diameter
• Includes master cylinder only; mounting hardware and reservoir not included
• Thread pitch of 1.0 for secure fitting

Detailed Product Description

The Dorman M390016 brake master cylinder is a critical component in the brake hydraulics system of Volvo 740, 760, and 780 vehicles. Constructed from cast iron, it offers strength and resistance to wear under demanding braking conditions. This master cylinder features two bore diameters, 0.75 inch and 0.875 inch, to accommodate specific brake system requirements. It includes three outlets, with a rearward outlet sized M10 x 1.0 and a secondary outlet thread diameter of 10mm, ensuring compatibility with the original brake lines. Note that this part does not include a reservoir or mounting hardware, so those components must be sourced separately.

Common Applications and Issues Addressed

• Restores proper hydraulic pressure in Volvo 740, 760, and 780 brake systems
• Replaces worn or leaking master cylinders causing brake fluid loss
• Eliminates spongy or unresponsive brake pedal feel
• Addresses brake failure symptoms related to internal cylinder wear
• Supports brake system maintenance and rebuild projects on compatible Volvo models

Installation Notes and Tips

• Ensure compatibility with Volvo 740, 760, or 780 before installation
• Bleed the brake system thoroughly after installation to remove air
• Use appropriate brake fluid as specified by the vehicle manufacturer
• Mounting hardware and reservoir must be reused or purchased separately
• Inspect brake lines and fittings for wear or damage during installation

Quality Assurance and Warranty

Dorman manufactures the M390016 brake master cylinder to meet or exceed OEM specifications for Volvo 740, 760, and 780 models. The cast iron construction provides durability and long service life. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in materials and workmanship. Refer to Dorman’s official documentation for exact warranty terms.