👉 Depot fluid, also known as base oil or carrier oil, is a crucial component in hydraulic systems, acting as the long-term lubricant and fluid reservoir. It circulates within the system to reduce friction between moving parts, such as pistons and cylinders, while also providing thermal stability and preventing corrosion. Depot fluid typically has a higher viscosity than the hydraulic fluid used for operation, ensuring it remains in place within the system during startup and operation. Over time, it absorbs water and contaminants, which is why it's regularly flushed and replaced to maintain optimal system performance and prevent damage.
