Dorman W104390 Drum Brake Wheel Cylinder - Rear Left

Overview of Dorman Drum Brake Wheel Cylinder W104390

The Dorman W104390 drum brake wheel cylinder is engineered for reliable brake hydraulics performance in select Ford and Mercury vehicles. Designed specifically for models like the Ford Escort, LN7, and Mercury Lynx, this component ensures precise brake fluid control and consistent stopping power.

• Includes bleeder screw for easy brake system bleeding
• Brake line inlet thread diameter: 10 mm
• Brake component inlet thread size: M10 x 1.0 with 1.0 thread pitch
• Constructed from durable cast iron for long-lasting strength
• Bore diameter measures 0.813 inches for proper fit and function
• Package contains one drum brake wheel cylinder

Detailed Product Description

The Dorman W104390 drum brake wheel cylinder is a critical component in the brake hydraulics system, responsible for converting hydraulic pressure into mechanical force to push the brake shoes against the drum. Crafted from cast iron, this wheel cylinder offers durability and resistance to wear under demanding braking conditions. The bore diameter of 0.813 inches ensures compatibility with the brake system specifications of the Ford Escort, LN7, and Mercury Lynx models. The included bleeder screw facilitates straightforward brake fluid bleeding, helping maintain optimal brake performance. The brake line inlet thread diameter of 10 mm and M10 x 1.0 thread size with a 1.0 pitch provide secure and leak-free connections to the brake lines.

Compatible Vehicles and Applications

• Ford Escort
• Ford LN7
• Mercury Lynx

This wheel cylinder is designed specifically for these models, ensuring proper fitment and brake system integrity.

Common Issues Addressed by This Wheel Cylinder

• Brake fluid leaks from worn or damaged wheel cylinders
• Reduced braking efficiency due to cylinder bore wear
• Brake drag caused by sticking or seized wheel cylinders
• Uneven brake shoe wear resulting from inconsistent cylinder operation
• Difficulty bleeding brakes due to missing or faulty bleeder screws

Installation Notes and Tips

When installing the Dorman W104390 wheel cylinder, ensure the brake system is fully depressurized and the vehicle is securely lifted. Use the included bleeder screw to properly bleed air from the brake lines after installation. Verify that the brake line inlet threads (M10 x 1.0) match the vehicle’s brake lines to prevent leaks. Inspect brake shoes and drums for wear and replace if necessary to maintain optimal braking performance.

Quality Assurance and Warranty

Dorman manufactures this drum brake wheel cylinder to meet or exceed OEM specifications, using cast iron for durability and reliability. The product includes a bleeder screw to facilitate maintenance. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulics components to ensure customer confidence in product quality.