Hydraulic Power and Cooling Capacity Available from Agricultural Tractors for Operating Hydraulic Motors

Methods of projecting (a) tractor hydraulic power and (b) cooling capacity available from the tractor for hydraulic motor usage have been desired to define the tractor hydraulic limits. A theory was developed to define a tractor hydraulic cooling capacity limit based on a pressure compensated (closed center) hydraulic system. The conservation of energy equation was modified for application to a tractor and implement control volume. The theoretical tractor hydraulic cooling capacity limit was compared to wind tunnel cooling test results. A graphical format was developed to present the maximum pressure, maximum power, and cooling capacity on the same plot.