Dorman W28850 Drum Brake Wheel Cylinder - Rear Upper

Reliable Drum Brake Wheel Cylinder for Accurate Brake Performance

The Dorman W28850 drum brake wheel cylinder is engineered to restore proper braking function in compatible vehicles. Designed with a durable cast iron construction and precise bore diameter, this wheel cylinder ensures consistent hydraulic pressure for safe and effective drum brake operation.

• Includes bleeder screw for easy brake system bleeding
• Cast iron casting material for strength and durability
• 1.5 inch bore diameter for accurate hydraulic response
• Brake line inlet thread diameter of 0.437 inches (7/16-20 thread size)
• Package contains one drum brake wheel cylinder

Durable Construction and Precise Specifications

The Dorman W28850 wheel cylinder features a robust cast iron body that withstands the rigors of brake system pressure and heat. Its 1.5 inch bore diameter is designed to provide consistent hydraulic force to the brake shoes, ensuring reliable stopping power. The included bleeder screw simplifies maintenance by allowing trapped air to be released from the brake lines, improving brake pedal feel and responsiveness. The brake line inlet thread size of 7/16-20 (0.437 inch diameter) ensures compatibility with standard brake lines used in many vehicles.

Compatible Vehicles and Common Applications

This drum brake wheel cylinder is compatible with various makes and models that require a 1.5 inch bore diameter and 7/16-20 brake line inlet thread. It is commonly used in older domestic and import vehicles equipped with rear drum brakes. The Dorman W28850 is suitable for restoring braking performance in vehicles experiencing issues such as:

• Brake fluid leaks from worn or damaged wheel cylinders
• Spongy or soft brake pedal due to air in the brake lines
• Uneven or reduced braking force on drum brakes
• Brake drag caused by sticking pistons within the wheel cylinder
• Corrosion or damage to the original wheel cylinder casting

Installation Notes and Tips

When installing the Dorman W28850 drum brake wheel cylinder, ensure the brake system is properly bled to remove any air pockets. Verify that the brake line inlet threads match the vehicle’s brake line fittings to avoid leaks. Inspect brake shoes and hardware for wear or damage during installation, as these components work together to provide effective braking. Use appropriate brake fluid and follow manufacturer torque specifications for mounting bolts and fittings.

Quality Assurance and Warranty Information

Dorman manufactures the W28850 wheel cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction and precise machining contribute to long service life and reliable brake performance. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulics products to cover defects in materials and workmanship.