An apparatus includes a regulator circuit that generates a voltage in response to an input current being supplied to an input terminal and functional circuitry, powered by the voltage generated by the regulator circuit. The assembly includes a first, chain drive sprocket which is coupled to and driven by a engine outputtorque converter input member such as an engine crankshaft or transmission input member, a chain and a second, driven chain sprocket which is coupled to a stub shaft and which, in turn, is coupled to an input shaft of the hydraulic pump. 1 microns and sufficient resiliency to permanently deform by less than 10% which contact the wafer surface in combination with a reactive liquid solution which may be recirculated, analyzed, adjusted, and from which soluble reaction products may be removed. Each bracket 26AB extends laterally from the bolster 14 and, when viewed in plan, each bracket 26AB has a longitudinal axis of symmetry which is orthogonal to a radius from a central rotational point of the articulated connector 50 of the railway wagon.