What role does hydraulic fluid play in a hydraulic system?

Hydraulic fluid plays a crucial role in transmitting force within a hydraulic system. When force is applied to the fluid in one part of the system, it creates pressure that can be directed to other parts of the system to perform work, such as lifting or moving heavy objects. This is due to the incompressible nature of the fluid, allowing it to easily convey pressure through tubing and hoses, ensuring that the mechanical advantage of the hydraulic system is effectively utilized. The ability of hydraulic fluid to transmit force efficiently makes it essential for operations like lifting ladders in aerial fire apparatus and operating various hydraulic mechanisms in equipment.

While hydraulic fluid may also assist in cooling components, preventing leaks, or storing energy as potential pressure, its primary and most critical function is to transmit force throughout the hydraulic system, enabling operations and actions consistent with the system's design.