Dorman M39478 Brake Master Cylinder

Overview of Dorman Brake Master Cylinder M39478

The Dorman Brake Master Cylinder M39478 is designed specifically for Toyota Land Cruiser models, providing reliable brake hydraulics performance. This cast iron master cylinder includes a reservoir and features a 0.875-inch bore diameter to ensure consistent braking pressure.

• Compatible with Toyota Land Cruiser vehicles
• Master cylinder bore diameter: 0.875 inches
• Durable cast iron construction
• Includes reservoir for brake fluid
• Four outlet ports with M10 x 1.0 and 1/8-20 NPT thread sizes
• Package contains master cylinder only; mounting hardware not included

Detailed Product Description

The Dorman M39478 brake master cylinder is engineered to meet the hydraulic braking needs of Toyota Land Cruiser models. Constructed from cast iron, this master cylinder offers durability and resistance to wear under demanding conditions. The 0.875-inch bore diameter is designed to provide optimal hydraulic pressure for effective brake system operation. It includes a reservoir to hold brake fluid, ensuring proper fluid supply and system integrity. The unit features four outlets with rearward and secondary outlet thread sizes of M10 x 1.0 and 1/8-20 NPT, allowing compatibility with various brake line fittings.

Common Applications and Problem Resolution

• Restores proper brake pedal feel and responsiveness
• Addresses brake fluid leaks from a worn or damaged master cylinder
• Eliminates spongy or inconsistent braking performance
• Replaces master cylinders with corroded or cracked cast iron bodies
• Ensures reliable brake fluid pressure distribution to all wheels

Installation Notes and Tips

• Compatible with Toyota Land Cruiser brake systems; verify vehicle year and specifications before installation
• Mounting hardware is not included; reuse existing hardware or source separately
• Bleed brake system thoroughly after installation to remove air and ensure proper function
• Inspect brake lines and fittings for wear or damage during installation
• Follow manufacturer torque specifications for outlet fittings and mounting bolts

Quality Assurance and Warranty

Dorman manufactures the M39478 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction provides long-lasting durability under normal operating conditions. While specific warranty details are not provided here, Dorman products typically come with a limited warranty against defects in material and workmanship. Consult product documentation or Dorman directly for exact warranty terms.