Raybestos MC39808 Brake Master Cylinder

Reliable Brake Master Cylinder for Jeep CJ5 and CJ7

The Raybestos Element3; New Brake Master Cylinder MC39808 is designed to restore precise brake hydraulics for Jeep CJ5 and CJ7 models. Engineered with durable aluminum and exact specifications, this master cylinder ensures consistent braking performance.

• Constructed from lightweight, corrosion-resistant aluminum
• 1.060 inch bore size for optimal hydraulic pressure
• Two mounting holes for secure installation
• Two ports with primary port thread 9/16"-18 and secondary port thread 1/2"-20
• Compatible specifically with Jeep CJ5 and CJ7 brake systems

About the Raybestos Element3; New Product Line

The Element3; New line by Raybestos focuses on delivering reliable brake hydraulics components with precise engineering and quality materials. This brake master cylinder MC39808 is part of that line, offering a balance of durability and performance tailored for classic Jeep models. The use of aluminum material and exact bore sizing reflects the line’s commitment to meeting OEM standards.

Detailed Product Description

This brake master cylinder features a 1.060 inch bore size, which is critical for maintaining proper hydraulic pressure in the braking system of Jeep CJ5 and CJ7 vehicles. The aluminum construction provides resistance to corrosion and reduces overall weight, contributing to vehicle efficiency. With two mounting holes, the MC39808 ensures a secure fit, while the two ports with specific thread sizes (primary port 9/16"-18 and secondary port 1/2"-20) allow for proper brake line connections. This part number MC39808 is engineered to meet the exact requirements of Jeep brake hydraulics, ensuring compatibility and reliable operation.

Common Applications and Issues Addressed

• Restores brake pressure loss in Jeep CJ5 and CJ7 models
• Replaces worn or leaking master cylinders causing brake fluid leaks
• Solves inconsistent brake pedal feel or sponginess
• Addresses brake system failure due to internal cylinder wear
• Improves overall brake system responsiveness and safety

Installation Notes and Tips

When installing the Raybestos MC39808 brake master cylinder, ensure the brake system is properly bled to remove air pockets. Verify that the mounting holes align correctly with the Jeep CJ5 or CJ7 brake booster or firewall. Use the specified port thread sizes (9/16"-18 primary and 1/2"-20 secondary) to connect brake lines securely. It is recommended to inspect brake lines and related components during installation for any signs of wear or damage.

Quality Assurance and Warranty

Raybestos manufactures the MC39808 brake master cylinder to meet stringent quality standards, using durable aluminum and precise machining. This part is backed by Raybestos’ quality assurance processes to ensure reliable performance in Jeep CJ5 and CJ7 vehicles. Warranty details are provided by Raybestos and typically cover defects in materials and workmanship under normal use.