NISSAN 49720-VC300 Power Steering Pressure Hose Assembly

The genuine Nissan (OEM: 49720-VC300) power steering pressure hose (Hose Tube Assembly - Power Steering) is an essential component of the vehicle's hydraulic power steering system. Its primary function is to safely and reliably deliver high-pressure hydraulic fluid produced by the power steering pump to the steering gear without loss, ensuring smooth and precise steering.

Technical Features and Construction

• Material Composition: Multi-layer, fiber-reinforced synthetic rubber hose with metal braided reinforcement, engineered to withstand high hydraulic pressure and chemical exposure (power steering fluid).
• Fittings: Precision metal tube ends and union connectors with a corrosion-resistant coating for an exact, leak-free fit.
• Thermal Resistance: Excellent durability against high operating temperatures found within the engine compartment.
• Design: Vibration-dampening construction that effectively reduces pressure pulsation and operating noise generated by the pump.

Common Symptoms of Failure

The power steering pressure hose is subjected to continuous high operating pressures and temperature fluctuations, which can cause wear over time. Common signs of failure include:

• Fluid Leaks: Hydraulic fluid appearing around the crimped metal fittings or weeping through the rubber surface.
• Noisy Operation: Whining or groaning noises when turning the steering wheel, caused by low fluid levels or air being drawn into the system due to leaks.
• Heavy Steering: A sudden or gradual increase in steering effort required to turn the wheel due to hydraulic pressure loss.
• Visible Damage: Cracks, surface abrasion, or chafing along the flexible rubber hose wall.

When replacing the power steering pressure hose, it is recommended to flush the entire hydraulic system and refill it with fresh power steering fluid meeting OEM specifications to preserve the service life of both the steering gear and the pump.