Dorman W37420 Drum Brake Wheel Cylinder - Rear, Rear Left or Rear Right

Reliable Drum Brake Wheel Cylinder for Toyota Pickup and Previa

The Dorman W37420 drum brake wheel cylinder is engineered to restore proper brake hydraulics on select Toyota models. Designed specifically for Toyota Pickup and Previa vehicles, this component ensures consistent braking performance by maintaining hydraulic pressure within the drum brake system.

• Includes bleeder screw for easy brake fluid bleeding
• Constructed from durable cast iron for long-lasting strength
• Bore diameter of 0.875 inches for precise fit and function
• Brake line inlet thread diameter of 10 mm with M10 x 1.0 thread size and 1.0 thread pitch
• Package contains one drum brake wheel cylinder

Technical Details and Specifications

The Dorman W37420 wheel cylinder features a cast iron construction that provides durability and resistance to wear under demanding braking conditions. The bore diameter of 0.875 inches is designed to match the original equipment specifications for Toyota Pickup and Previa models, ensuring proper hydraulic pressure and brake shoe movement. The brake line inlet thread diameter is 10 mm, with an M10 x 1.0 thread size and a 1.0 thread pitch, allowing for secure and leak-free brake line connections. This wheel cylinder includes a bleeder screw to facilitate brake fluid bleeding during installation or maintenance, although it does not come with a bleeder screw cap.

Compatible Toyota Models and Applications

This drum brake wheel cylinder is compatible with Toyota Pickup and Toyota Previa vehicles, making it a suitable replacement part for maintaining the brake hydraulics system on these models. The Dorman W37420 part number corresponds directly to the specifications required for these vehicles, ensuring proper fitment and reliable braking performance.

• Restores hydraulic pressure in drum brake systems
• Addresses brake fluid leaks from worn or damaged cylinders
• Eliminates spongy or unresponsive brake pedal feel
• Prevents uneven brake shoe wear caused by cylinder malfunction
• Helps maintain consistent braking force for vehicle safety

Installation Notes and Tips

When installing the Dorman W37420 drum brake wheel cylinder, ensure the brake system is properly bled using the included bleeder screw to remove air and maintain hydraulic integrity. Verify that the brake line inlet threads match the M10 x 1.0 specification to avoid leaks. Inspect brake shoes and drums for wear during installation and replace if necessary to ensure optimal braking performance. Use appropriate tools to avoid damaging the cast iron casting during installation.

Quality Assurance and Warranty Information

Dorman manufactures the W37420 wheel cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction provides durability under normal operating conditions. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulics components to cover defects in materials and workmanship.