To calculate the pump and hydraulic system for a mechanical setup, it's essential to understand the relationship between pump pressure, flow rate, and head loss in the piping system. The pump curve provides necessary data for determining pump pressure based on the required flow. The selection of a pump is influenced by the piping system's characteristics, as it dictates the pressure through resistance to flow. Pumps generate flow rather than pressure, with the latter being a result of the system's design. For further assistance, specific details about the system are recommended, along with resources for pressure drop calculations and pump information.