How temperature affects hydraulic fluid performance

 The temperature directly affects hydraulic fluid viscosity. It is the most important aspect of how a hydraulic system performs. As the fluid heats up, it becomes thinner, leading to internal leakage, decreased lubrication of components, and more rapid wear. When the temperature of the fluid drops, it becomes thicker, which causes an inefficient response and a risk of cavitation and starvation of the pump. Maintaining the fluid in its optimal viscosity range—usually measured between 100°F and 130°F (38°C and 54°C) for a majority of industrial equipment—is vital for ensuring constant pressure control, effective power transfer, and long-term reliability of equipment.

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