Raybestos MC39309 Brake Master Cylinder

Reliable Brake Master Cylinder for Chevrolet, GMC, and Hummer

The Raybestos Element3; New Brake Master Cylinder MC39309 is engineered to restore precise brake hydraulics in select Chevrolet, GMC, and Hummer vehicles. Designed with durable iron construction and exact fitment specifications, this master cylinder supports safe and consistent braking performance.

• Constructed from robust iron material for long-lasting durability
• Features a 34.000 mm bore size for optimal hydraulic pressure
• Includes two mounting holes with a diameter of 0.433 inches for secure installation
• Equipped with two ports: primary port thread 9/16"-18 and secondary port thread 1/2"-20
• Compatible with Chevrolet G30, GMC P30, P3500, and Hummer H1 models

About the Raybestos Element3; New Product Line

The Element3; New line by Raybestos focuses on delivering reliable brake hydraulics components that meet or exceed OEM standards. This brake master cylinder MC39309 is part of that line, offering precise engineering and material quality to ensure consistent brake system performance for heavy-duty and commercial vehicles.

Detailed Product Description

This brake master cylinder MC39309 is designed specifically for use in Chevrolet G30, GMC P30, P3500, and Hummer H1 vehicles. Its iron construction provides strength and resistance to wear, while the 34.000 mm bore size ensures proper hydraulic pressure for effective braking. The two mounting holes with a 0.433-inch diameter allow for a secure fit, and the dual ports with specified thread sizes accommodate standard brake line connections. This part supports the hydraulic brake system by converting pedal force into hydraulic pressure, essential for safe vehicle operation.

Common Applications and Issues Addressed

• Restores brake pedal firmness and responsiveness
• Eliminates brake fluid leaks from worn or damaged master cylinders
• Resolves inconsistent braking pressure or spongy brake pedal feel
• Replaces faulty master cylinders in Chevrolet G30, GMC P30, P3500, and Hummer H1
• Supports maintenance of brake hydraulics in heavy-duty and commercial vehicles

Installation Notes and Tips

• Ensure compatibility with Chevrolet G30, GMC P30, P3500, or Hummer H1 before installation
• Use proper tools to avoid damaging mounting holes or port threads
• Bleed the brake system thoroughly after installation to remove air
• Inspect brake lines and fittings for wear or damage during replacement
• Follow vehicle manufacturer torque specifications for mounting bolts

Quality Assurance and Warranty

Raybestos Element3; New brake master cylinders are manufactured to meet stringent quality standards, ensuring reliable performance and durability. While specific warranty details for part number MC39309 should be confirmed with the supplier, Raybestos products typically come with a limited warranty covering defects in materials and workmanship.