Dorman W37639 Drum Brake Wheel Cylinder - Rear

Reliable Drum Brake Wheel Cylinder for Toyota RAV4 and Van

The Dorman W37639 drum brake wheel cylinder is engineered to restore proper braking function for Toyota RAV4 and Van models. Designed with durable cast iron construction and precise specifications, this wheel cylinder ensures consistent hydraulic pressure for safe and effective braking performance.

• Includes bleeder screw for easy brake system bleeding
• Brake line inlet thread diameter: 10 mm
• Brake component inlet thread size: M10 x 1.0 with 1.0 thread pitch
• Bore diameter of 0.813 inches for accurate fitment
• Constructed from cast iron for strength and durability
• Package contains one drum brake wheel cylinder

Detailed Product Description

The Dorman W37639 drum brake wheel cylinder is specifically designed for Toyota RAV4 and Van vehicles, providing a direct replacement for worn or leaking wheel cylinders. Its cast iron casting material offers reliable resistance to corrosion and wear, ensuring long service life. The bore diameter of 0.813 inches matches OEM specifications to maintain proper hydraulic pressure within the brake system. The included bleeder screw simplifies brake fluid bleeding during installation or maintenance, although the bleeder screw cap is not included. The brake line inlet thread diameter of 10 mm and M10 x 1.0 thread size with a 1.0 pitch ensure compatibility with the vehicle’s brake lines for a secure connection.

Common Applications and Issues Addressed

• Restores braking performance on Toyota RAV4 and Van drum brake systems
• Replaces leaking or damaged wheel cylinders causing brake fluid loss
• Eliminates spongy or soft brake pedal feel due to hydraulic leaks
• Prevents uneven brake shoe wear caused by malfunctioning wheel cylinders
• Addresses brake drag or sticking issues related to wheel cylinder failure

Installation Notes and Tips

• Ensure brake system is fully depressurized before removal
• Use the included bleeder screw to properly bleed air from the brake lines after installation
• Verify thread compatibility with existing brake lines (M10 x 1.0 thread size)
• Inspect brake shoes and hardware for wear during installation
• Follow vehicle manufacturer torque specifications for mounting bolts

Quality Assurance and Warranty

Dorman manufactures the W37639 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 may vary, Dorman typically offers limited warranties covering defects in material and workmanship. Always consult product documentation or contact the manufacturer for exact warranty terms.