What is the function of hydraulic fluid in a hydraulic system?

The primary function of hydraulic fluid in a hydraulic system is to transfer power and facilitate movement. Hydraulic systems operate on the principle of fluid under pressure, where the hydraulic fluid transmits force from one part of the system to another. This process allows hydraulic machinery to perform work by converting thermal energy into mechanical energy.

Hydraulic fluid is essential for enabling the motion of actuators, such as cylinders and motors, which rely on the pressurized fluid to create movement. The ability of hydraulic fluid to efficiently transmit pressure is what makes hydraulic systems so effective for lifting, pushing, or controlling various mechanical functions in equipment like excavators, forklifts, and presses.

While hydraulic fluid can also provide some degree of lubrication, cooling, and cleaning, these functions are secondary compared to its primary role in power transmission. Therefore, highlighting the power transfer aspect captures the essence of what hydraulic fluid contributes to the overall operation of a hydraulic system.