The pump draws oil from the reservoir, through a suction filter, which strains large debris from the pump. This flow of oil is then pumped through an external filter assembly, consisting of an aluminum housing, sintered filter element, and o-rings. The bottom of the filter housing spins off, making changing or cleaning the filter quick and easy. The filter element is a 25 micron sintered cup, in which the oil diffuses through the element wall, trapping debris and contaminants, before exiting the housing. Once the oil has pumped through the filter assembly, it then passes through an oil flow-sensor. As the oil flows through the sensor, a small brass piston is raised by the oil flow, compressing a small spring.
