Dorman W55890 Drum Brake Wheel Cylinder - Front Left or Front Left Upper

Reliable Drum Brake Wheel Cylinder for Ford and Mercury Vehicles

The Dorman W55890 drum brake wheel cylinder is engineered to restore proper braking function for select Ford and Mercury models. Designed with durable cast iron construction and precise specifications, this wheel cylinder ensures consistent hydraulic pressure for safe stopping performance.

Key Features of the Dorman W55890 Wheel Cylinder

• 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: 3/8-24 UNF
• Thread diameter of 3/8 inch for secure installation
• Package contains one drum brake wheel cylinder

Detailed Product Description

The Dorman W55890 drum brake wheel cylinder is specifically designed for use in Ford Montego and Mustang models, as well as Mercury vehicles. Its cast iron casting material provides reliable resistance to wear and corrosion, extending the service life of the brake component. The included bleeder screw facilitates proper brake fluid evacuation during maintenance, although a bleeder screw cap is not included. With a bore diameter of 1.094 inches and a brake component inlet thread size of 3/8-24 UNF, this wheel cylinder meets OEM specifications for hydraulic brake systems. The 3/8 inch thread diameter ensures compatibility with standard brake line fittings.

Applications and Common Issues Addressed

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

Installation Notes and Tips

• Ensure compatibility with your specific Ford or Mercury model before installation
• Use the included bleeder screw to properly bleed air from the brake system
• Inspect brake lines and fittings for damage or corrosion during replacement
• Apply appropriate brake fluid and follow manufacturer torque specifications
• Test brake pedal firmness after installation to confirm proper function

Quality Assurance and Warranty Information

Dorman manufactures the W55890 wheel cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction provides durability under typical operating conditions. While specific warranty details may vary, Dorman products generally include limited warranties covering defects in material and workmanship. Refer to Dorman’s official documentation for exact warranty terms.