Do I need a Hydraulic Cooler for my powerpack?A design decision to fit a hydraulic oil cooler like this can only be made with a full assessment of how much heat is going to be put into the oil and how much of that heat can the system dissipate without the oil overheating.The heat comes from inefficiencies or losses. The greater the inefficiencies the greater more power input will be required to overcome them. The inefficiencies will manifest themselves as heat. So the amount of extra input power...