Dorman M39980 Brake Master Cylinder

Reliable Brake Master Cylinder for Jeep Wrangler

The Dorman M39980 brake master cylinder is designed specifically for Jeep Wrangler models, providing dependable brake hydraulics performance. Crafted from durable cast iron, this master cylinder includes a reservoir and features precise bore and outlet specifications to ensure proper fit and function.

• Master cylinder bore diameter: 1 inch
• Constructed from cast iron for durability
• Includes reservoir for brake fluid
• Two outlets with secondary outlet thread diameter of 0.5 inch
• Rearward outlet size: 7/16-24
• Package contains the master cylinder only; mounting hardware not included
• Compatible with Jeep Wrangler models

Detailed Product Description

The Dorman M39980 brake master cylinder is engineered to meet the hydraulic braking needs of Jeep Wrangler vehicles. Its cast iron construction offers strength and resistance to wear, while the 1-inch bore diameter ensures consistent hydraulic pressure for effective braking. The included reservoir simplifies installation and maintenance by providing a ready-to-use brake fluid container. Featuring two outlets, including a secondary outlet with a 0.5-inch thread diameter and a rearward outlet sized at 7/16-24, this master cylinder is designed to integrate seamlessly with the Wrangler's brake system. Note that mounting hardware is not included, so existing hardware or separate purchase may be necessary.

Common Applications and Issues Addressed

• Restores proper brake fluid pressure in Jeep Wrangler brake systems
• Replaces worn or leaking master cylinders causing brake pedal sponginess
• Solves brake fluid reservoir leaks or contamination issues
• Addresses inconsistent braking performance due to master cylinder failure
• Supports brake system rebuilds or upgrades on Jeep Wrangler vehicles

Installation Notes and Tips

• Ensure compatibility with your specific Jeep Wrangler model year before installation
• Bleed the brake system thoroughly after installation to remove air pockets
• Use appropriate brake fluid as specified by the vehicle manufacturer
• Inspect existing mounting hardware for wear; replacement may be required since hardware is not included
• Follow all safety precautions when working with brake hydraulics

Quality Assurance and Warranty

Dorman manufactures the M39980 brake master cylinder to meet or exceed OEM standards for fit and function. The cast iron material and precise machining contribute to long service life and reliable braking performance. While specific warranty details are not provided here, Dorman products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.