Dorman W37870 Drum Brake Wheel Cylinder - Rear

Reliable Drum Brake Wheel Cylinder for Nissan D21, Pathfinder, and Pickup

The Dorman W37870 drum brake wheel cylinder is engineered to restore proper braking function for select Nissan models. Designed with precision, this component ensures consistent hydraulic pressure within the drum brake system for Nissan D21, Pathfinder, and Pickup vehicles.

• Includes bleeder screw for easy brake fluid bleeding
• Brake line inlet thread diameter: 10 mm
• Brake component inlet thread size: M10 x 1.0 with 1.0 thread pitch
• Constructed from durable aluminum casting material
• Bore diameter measures 0.813 inches
• Package contains one drum brake wheel cylinder

Product Details and Specifications

The Dorman W37870 wheel cylinder is crafted from aluminum, providing corrosion resistance and long-lasting performance in brake hydraulics. Its bore diameter of 0.813 inches is designed to match OEM specifications for optimal piston movement and brake shoe engagement. The included bleeder screw simplifies maintenance by allowing trapped air to be released from the brake lines, ensuring consistent hydraulic pressure. The brake line inlet thread diameter of 10 mm and M10 x 1.0 thread size with a 1.0 pitch ensure compatibility with factory brake lines on Nissan D21, Pathfinder, and Pickup models.

Compatible Nissan Models and Applications

This drum brake wheel cylinder is compatible with the following Nissan vehicles:

• Nissan D21
• Nissan Pathfinder
• Nissan Pickup

It is designed specifically for the brake hydraulics system of these models, providing a direct replacement for worn or leaking wheel cylinders.

Common Issues Addressed by This Wheel Cylinder

• Brake fluid leaks from the wheel cylinder
• Reduced braking efficiency due to worn or seized pistons
• Spongy brake pedal caused by air in the brake lines
• Uneven brake shoe wear resulting from inconsistent hydraulic pressure
• Brake drag or sticking caused by faulty wheel cylinder operation

Installation Notes and Tips

When installing the Dorman W37870 wheel cylinder, ensure the brake system is properly bled using the included bleeder screw to remove air pockets. Verify that the brake line inlet threads match the M10 x 1.0 specification to avoid leaks. Inspect brake shoes and hardware for wear and replace as necessary to maintain optimal braking performance. Use appropriate brake fluid and follow manufacturer torque specifications during installation.

Quality Assurance and Warranty

Dorman manufactures this wheel cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum casting material offers durability and resistance to corrosion in brake hydraulic environments. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake components to ensure customer confidence in product reliability.