Dorman W37571 Drum Brake Wheel Cylinder - Rear

Reliable Drum Brake Wheel Cylinder for Nissan 720, D21, Pickup

The Dorman W37571 drum brake wheel cylinder is engineered to restore proper braking function for Nissan 720, D21, and Pickup models. Designed with durable cast iron construction and precise specifications, this wheel cylinder ensures consistent hydraulic pressure and brake performance.

• 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
• Bore diameter measures 0.688 inches for accurate fit
• Constructed from cast iron for strength and durability
• Package contains one drum brake wheel cylinder

Product Details and Specifications

The Dorman W37571 wheel cylinder is specifically designed for Nissan 720, D21, and Pickup vehicles, providing a direct replacement for the original equipment part. Its cast iron casting material offers resistance to wear and corrosion, ensuring long service life under demanding braking conditions. The bore diameter of 0.688 inches matches OEM specifications to maintain proper hydraulic pressure and piston movement. The included bleeder screw simplifies brake system maintenance by allowing trapped air to be released efficiently. 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.

Common Applications and Problem Resolution

• Restores braking performance by replacing leaking or seized wheel cylinders
• Eliminates brake fluid leaks at the drum brake assembly
• Prevents uneven brake shoe wear caused by faulty hydraulic pressure
• Addresses spongy or soft brake pedal feel due to air in brake lines
• Improves overall brake system reliability on Nissan 720, D21, and Pickup models

Installation Notes and Tips

When installing the Dorman W37571 drum brake wheel cylinder, ensure the brake system is properly bled using the included bleeder screw to remove air pockets. Verify thread compatibility with the brake line inlet (M10 x 1.0) before installation. 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 for mounting bolts.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable fit and function. The W37571 drum brake wheel cylinder undergoes rigorous quality control to ensure durability and performance. This part is backed by Dorman's limited warranty, covering defects in material and workmanship under normal use.