Raybestos MC390268 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford, Mazda, and Mercury Vehicles

The Raybestos Element3; New Brake Master Cylinder MC390268 is engineered to restore precise brake hydraulics for select Ford, Mazda, and Mercury models. Designed with durable aluminum construction and specific mounting features, this master cylinder ensures consistent braking performance for your B2300, B3000, B4000, Explorer, Mountaineer, and Ranger vehicles.

• Constructed from lightweight, corrosion-resistant aluminum
• Two mounting holes with 0.421-inch diameter for secure installation
• 1.000-inch bore size optimized for brake fluid pressure control
• Two ports with M12x1 primary and M10x1 secondary port threads
• Compatible with Ford B2300, B3000, B4000, Explorer, Mercury Mountaineer, and Mazda Ranger

About the Raybestos Element3; New Product Line

The Element3; New line from Raybestos focuses on delivering reliable brake hydraulics components that meet or exceed OEM specifications. This brake master cylinder MC390268 is part of that line, offering precise bore sizing and port threading to match factory requirements. The aluminum material provides a balance of strength and corrosion resistance, supporting long-term durability in demanding driving conditions.

Technical Details and Specifications

This brake master cylinder features a 1.000-inch bore size, which is critical for maintaining proper hydraulic pressure in the braking system. The two mounting holes, each with a diameter of 0.421 inches, allow for a secure and stable fitment. The unit includes two ports: a primary port with M12x1 threading and a secondary port with M10x1 threading, ensuring compatibility with the brake lines on the specified vehicle models. The aluminum construction reduces weight while resisting corrosion, contributing to consistent brake performance over time.

Common Applications and Problem Resolution

• Restores brake pressure loss in Ford B2300, B3000, and B4000 trucks
• Replaces worn or leaking master cylinders on Mazda Ranger models
• Addresses brake pedal sponginess in Ford Explorer and Mercury Mountaineer
• Fixes brake fluid leaks caused by damaged port threads or seals
• Improves overall brake system responsiveness and safety

Installation Notes and Tips

When installing the Raybestos MC390268 brake master cylinder, ensure the mounting holes align precisely with the vehicle’s brake booster or firewall bracket. Use the correct torque specifications for the mounting bolts to avoid distortion. Verify that the M12x1 and M10x1 port threads match the brake line fittings to prevent leaks. Bleed the brake system thoroughly after installation to remove air and restore proper hydraulic pressure.

Quality Assurance and Warranty Information

Raybestos manufactures the MC390268 brake master cylinder to meet stringent quality standards, ensuring reliable performance and durability. The Element3; New product line undergoes rigorous testing to comply with OEM fit and function requirements. While specific warranty details may vary, Raybestos typically offers coverage against defects in materials and workmanship to support customer confidence in this brake hydraulics component.