Dorman M39498 Brake Master Cylinder

Reliable Brake Master Cylinder for Ford Escort and Mercury Lynx

The Dorman M39498 brake master cylinder is engineered to restore proper brake hydraulics for select Ford and Mercury vehicles. Designed specifically for models like the Ford Escort, Mercury LN7, and Lynx, this master cylinder ensures consistent brake fluid pressure and reliable stopping power.

• Constructed from durable cast iron for long-lasting performance
• Includes reservoir for brake fluid management
• Features a 19.75 mm & 1-1/8 inch bore diameter for precise hydraulic control
• Equipped with four outlets to support complex brake line configurations
• Rearward outlet sizes: M10 x 1.0 and M16 x 1.0 for proper fitment
• Secondary outlet thread diameters: M12 x 1.0 and M18 x 1.5
• Package contains the master cylinder only; mounting hardware not included

Detailed Product Description

The Dorman M39498 brake master cylinder is a cast iron component designed to meet the hydraulic requirements of Ford Escort, Mercury LN7, and Lynx models. Its integrated reservoir allows for efficient brake fluid storage and delivery, while the bore diameter of 19.75 mm (1-1/8 inch) ensures accurate pressure modulation within the brake system. The master cylinder features four outlets, including rearward outlets sized M10 x 1.0 and M16 x 1.0, as well as secondary outlet threads of M12 x 1.0 and M18 x 1.5, providing compatibility with the original brake line fittings on these vehicles. This part is ideal for restoring brake system integrity without the need for additional sensors or mounting hardware.

Common Applications and Issues Addressed

• Restores brake fluid pressure in Ford Escort and Mercury Lynx brake systems
• Replaces worn or leaking master cylinders causing brake pedal sponginess
• Solves brake fluid reservoir leaks or contamination issues
• Addresses inconsistent brake response due to internal cylinder wear
• Supports brake system repairs requiring precise bore diameter and outlet threading

Installation Notes and Tips

• Ensure compatibility with Ford Escort, Mercury LN7, and Lynx models before installation
• Bleed the brake system thoroughly after installation to remove air pockets
• Use appropriate brake fluid as specified by the vehicle manufacturer
• Mounting hardware is not included; reuse existing hardware or source separately
• Inspect brake lines and fittings for wear or damage during installation

Quality Assurance and Warranty

Dorman manufactures the M39498 brake master cylinder to meet or exceed OEM specifications for fit, form, and function. The cast iron construction provides durability under demanding conditions. While mounting hardware and sensors are not included, the product is designed for straightforward replacement in compatible Ford and Mercury models. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.