Dorman W55891 Drum Brake Wheel Cylinder - Front Right or Front Right Upper

Reliable Drum Brake Wheel Cylinder for Ford and Mercury Vehicles

The Dorman W55891 drum brake wheel cylinder is engineered to restore proper braking function in select Ford and Mercury models. Designed with durable cast iron construction and precise specifications, this wheel cylinder ensures consistent hydraulic pressure for safe and effective braking performance.

• Includes bleeder screw for easy brake system bleeding
• Constructed from cast iron for strength and durability
• 1.094 inch bore diameter for accurate fit and function
• Brake component inlet thread size of 3/8-24 inches
• Thread diameter of 3/8 inch for secure installation
• Package contains one drum brake wheel cylinder

Detailed Product Description

The Dorman W55891 drum brake wheel cylinder is specifically designed for use in Ford Montego and Mustang models, as well as compatible Mercury vehicles. Its cast iron casting material provides reliable resistance to wear and corrosion, extending the service life of the brake component. The 1.094 inch bore diameter ensures proper hydraulic pressure is applied to the brake shoes, maintaining effective stopping power. The included bleeder screw simplifies the brake bleeding process, allowing for maintenance without additional parts. Thread specifications of 3/8-24 inches for the brake component inlet and a 3/8 inch thread diameter guarantee compatibility with the vehicle’s brake hydraulic system.

Applications and Problem Solving

• Restores braking performance in Ford Montego and Mustang drum brake systems
• Replaces leaking or seized wheel cylinders causing brake fluid loss
• Addresses uneven brake shoe wear due to faulty hydraulic pressure
• Eliminates spongy brake pedal feel caused by internal cylinder failure
• Prevents brake drag from stuck pistons within the wheel cylinder

Installation Notes and Tips

When installing the Dorman W55891 wheel cylinder, ensure the brake system is properly bled using the included bleeder screw to remove air and maintain hydraulic integrity. Verify thread compatibility with the vehicle’s brake lines before installation. Inspect brake shoes and drums for wear or damage during replacement to ensure optimal braking performance. Use appropriate tools to avoid damaging the cast iron casting or threads.

Quality Assurance and Warranty

Dorman manufactures the W55891 wheel cylinder to meet or exceed OEM specifications for fit, form, and function. The cast iron construction and precise machining contribute to long-lasting durability. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in material and workmanship.