Dorman M39509 Brake Master Cylinder

Reliable Brake Master Cylinder for Nissan 720

The Dorman M39509 brake master cylinder is designed specifically for Nissan 720 models, providing precise hydraulic control for your vehicle's braking system. Engineered with durable aluminum and equipped with a reservoir and sensor, this master cylinder ensures consistent brake performance.

Key Features of the Dorman M39509 Brake Master Cylinder

• Master cylinder bore diameter of 0.938 inches for accurate hydraulic pressure
• Constructed from lightweight, corrosion-resistant aluminum material
• Includes an integrated reservoir for brake fluid storage
• Equipped with a sensor to monitor brake system status
• Two outlet ports with rearward outlet size M10 x 1.0 and thread pitch 1.0
• Secondary outlet thread diameter of 10 mm for secure connections

Detailed Product Description

The Dorman M39509 brake master cylinder is a critical component in the brake hydraulics system of Nissan 720 vehicles. Its aluminum construction offers strength and resistance to corrosion, extending the service life of the part. The 0.938-inch bore diameter is designed to deliver precise hydraulic pressure to the brake calipers or wheel cylinders. This master cylinder includes a reservoir to hold brake fluid and a sensor that provides feedback to the vehicle’s brake system, enhancing safety and reliability. With two outlets and standardized thread sizes, it ensures compatibility with the Nissan 720’s brake lines and fittings.

Common Applications and Issues Addressed

• Restores proper brake fluid pressure for consistent braking response
• Replaces worn or leaking master cylinders causing brake fluid loss
• Solves brake pedal sinking or sponginess due to internal seal failure
• Addresses brake warning light activation related to sensor faults
• Improves overall brake system reliability and safety on Nissan 720 trucks

Installation Notes and Tips

• Ensure brake fluid reservoir is properly filled before installation
• Bleed the brake system thoroughly to remove air after replacement
• Verify thread pitch and outlet sizes match existing brake lines
• Use appropriate tools to avoid damaging aluminum surfaces
• Consult vehicle service manual for torque specifications and procedures

Quality Assurance and Warranty

Dorman manufactures the M39509 brake master cylinder to meet or exceed OEM specifications for Nissan 720 vehicles. The aluminum construction and integrated sensor are tested for durability and performance. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in materials and workmanship.