Dorman W370031 Drum Brake Wheel Cylinder - Rear, Rear Left or Rear Right

Reliable Drum Brake Wheel Cylinder for Ford and Mazda Trucks

The Dorman W370031 drum brake wheel cylinder is engineered to restore proper braking function in select Ford and Mazda trucks. Designed with durable cast iron and precise dimensions, this component ensures consistent hydraulic pressure for safe stopping performance.

• Includes bleeder screw for easy brake system bleeding
• Cast iron construction for strength and durability
• 0.75 inch bore diameter for accurate fit and function
• Brake line inlet thread diameter of 0.437 inches (7/16-24 UNS thread size)
• Compatible with Ford B2300, B3000, B4000, and Ranger models
• Package contains one drum brake wheel cylinder

Detailed Product Description

The Dorman W370031 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. Manufactured from cast iron, this wheel cylinder offers reliable resistance to wear and corrosion. The included bleeder screw simplifies maintenance by allowing trapped air to be released from the brake lines, ensuring optimal brake responsiveness. With a bore diameter of 0.75 inches and a brake line inlet thread size of 7/16-24 UNS, this part is designed to meet the exact specifications required for proper fitment and function in Ford and Mazda trucks.

Compatible Vehicles and Applications

• Ford B2300
• Ford B3000
• Ford B4000
• Ford Ranger
• Mazda B2300
• Mazda B3000
• Mazda B4000
• Mazda Ranger

Common Issues Addressed by This Wheel Cylinder

• Brake fluid leaks from worn or damaged wheel cylinders
• Reduced braking efficiency due to uneven brake shoe application
• Spongy brake pedal caused by air in the brake lines
• Brake drag or sticking caused by seized wheel cylinder pistons
• Corrosion-related failure in brake hydraulics

Installation Notes and Tips

When installing the Dorman W370031 drum brake wheel cylinder, ensure the brake system is fully depressurized and the vehicle is securely supported. Use the included bleeder screw to properly bleed the brake system after installation to remove any air pockets. Verify that the brake line inlet threads match the vehicle’s brake lines to avoid leaks. Inspect brake shoes and drums for wear and replace if necessary to maintain optimal braking performance.

Quality Assurance and Warranty

Dorman manufactures the W370031 wheel cylinder to meet or exceed OEM specifications, using cast iron for durability and long service life. This part is backed by Dorman’s limited warranty, providing coverage against defects in materials and workmanship under normal use conditions.