Ok apples to oranges but from my experience the hydrolic oil is exposed to heat element (if it didn't get hot it would stay thicker and the machines would run slower> it always takes 3-4 hours for the machinery to get good and warmed up after the weekend) Every one of the tanks also has a radiator with cooling fans to help keep the temp in the ideal operating range.If it didn't stay in that range it would suffer a thermal breakdown... anyway its off topic so I will quit rambling