Dorman M39550 Brake Master Cylinder

Overview of the Dorman Brake Master Cylinder M39550

The Dorman Brake Master Cylinder M39550 is a precision-engineered component designed for reliable brake hydraulics performance. Crafted from durable aluminum, this master cylinder is ideal for vehicles requiring a 0.813-inch bore diameter and three outlet ports.

• Master cylinder bore diameter: 0.813 inches
• Constructed from lightweight aluminum material
• Includes three outlets for brake line connections
• Secondary outlet thread diameter: 10 mm with 1.0 thread pitch
• Rearward outlet size: M10 x 1.0
• Does not include reservoir or mounting hardware
• Part number: M39550

Detailed Product Description

The Dorman M39550 brake master cylinder is engineered to meet the specifications required for certain vehicle brake systems, particularly those compatible with a 0.813-inch bore diameter. Its aluminum construction offers a balance of strength and corrosion resistance, contributing to long-term durability. The master cylinder features three outlets, including a secondary outlet with a 10 mm thread diameter and a rearward outlet sized M10 x 1.0, designed to accommodate specific brake line configurations. This part does not include a reservoir or mounting hardware, allowing for flexible installation with existing components.

Common Applications and Problem Resolution

This brake master cylinder is typically used in vehicles where the original master cylinder has failed or is showing signs of wear. It addresses several brake system issues, including:

• Loss of hydraulic pressure causing spongy brake pedal feel
• Brake fluid leaks from worn or damaged master cylinder seals
• Inconsistent brake response due to internal component wear
• Brake pedal sinking or failure to maintain pressure
• Replacement in vehicles requiring a 0.813-inch bore diameter master cylinder

Installation Notes and Tips

When installing the Dorman M39550 brake master cylinder, ensure the brake system is properly bled to remove air and restore hydraulic pressure. Since mounting hardware and reservoir are not included, verify compatibility with existing components before installation. Use appropriate thread sealant on outlet fittings to prevent leaks. It is recommended to inspect brake lines and related components during installation for optimal system performance.

Quality Assurance and Warranty

Dorman manufactures the M39550 brake master cylinder to meet or exceed OEM standards for fit and function. The aluminum construction provides corrosion resistance and durability under normal operating conditions. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in material and workmanship. Consult product documentation or the manufacturer for exact warranty terms.