Abstract: An improved hydraulic throttle control apparatus and method for automatically regulating the flow rate of a fixed displacement hydraulic pump driven by an internal combustion engine having a conventional throttle. The apparatus senses the flow requirements of a hydraulic tool, which may be either large or small, that is being driven by the pump. In particular, the apparatus monitors hydraulic pressure in the supply line of the tool, and depending upon the pressure level sensed, sets the engine's throttle to an idle speed position, a high speed position or intermediate speed position. Each throttle position produces a distinct pump flow rate. In a typical embodiment of the apparatus intended for use with a plurality of pumps and tools, the apparatus is comprised of a shuttle valve, first and second hydraulic cylinder means, and a sequence valve.