NISSAN 44100-VC210 Rear Wheel Brake Cylinder

The genuine OEM part NISSAN 44100-VC210 is a premium-quality rear wheel brake cylinder, serving as a critical component of the vehicle's hydraulic drum brake system. Its primary function is to convert hydraulic pressure generated by depressing the brake pedal into mechanical force, pressing the brake shoes against the inner surface of the brake drum to ensure effective vehicle deceleration and stopping.

Technical Specifications and Construction

The wheel cylinder is precision-machined to meet rigorous factory (OEM) standards, ensuring an exact fit and long service life. Key characteristics include:

• Material Quality: High-strength cast iron or light-alloy housing engineered to withstand high hydraulic pressures and thermal stress.
• Seals: Equipped with specialized, brake-fluid-resistant EPDM rubber seals and dust boots to prevent leaks and protect internal components against contamination from dust, moisture, and road salt.
• Pistons: Precision-machined pistons with a corrosion-resistant coating for smooth, bind-free operation.
• Fitting Position: Rear axle.

Typical Symptoms of Failure and Importance

Because the braking system is safety-critical, regular inspection of the wheel cylinder is essential. Common symptoms of wear or failure include:

• Brake Fluid Leakage: Fluid traces visible on the inner face of the brake drum or the inside rim of the wheel indicate deteriorated seals.
• Soft or Spongy Brake Pedal: Air entering the hydraulic circuit or internal pressure loss causes an inconsistent, spongy pedal feel.
• Reduced Braking Efficiency: Leaking brake fluid can contaminate the brake shoe linings, drastically reducing friction and extending stopping distance.
• Vehicle Pulling During Braking: A sticking, seized, or leaking wheel cylinder on one side causes uneven brake force, causing the vehicle to pull to one side.

For optimal safety and balanced braking performance, it is recommended to replace rear wheel brake cylinders in axle pairs, followed by a complete brake system bleed and refill with fresh, specified brake fluid.