Hydraulic fluids are specialized liquids used in hydraulic systems to transmit power. They work by transferring force through the fluid, allowing machinery to operate efficiently. Commonly used in various applications, such as construction equipment and automobiles, these fluids help control movement and provide lubrication. These fluids are designed to withstand high pressures and temperatures while maintaining their properties. They often contain additives to prevent corrosion, reduce foaming, and improve performance. Proper selection and maintenance of hydraulic fluids are essential for the longevity and efficiency of hydraulic systems.