本SAE信息报告主要是为了让液压机械的设计者熟悉液压动力回路中进行油过滤的必要性、所需的系统清洁度、可用的过滤和过滤器类型，以及它们在液压回路中的位置和维护。

This SAE Information Report is primarily to familiarize the designer of hydraulic powered machinery with the necessity for oil filtration in the hydraulic power circuit, the degree of system cleanliness required, types of filtration and filters available, and their location and maintenance in the hydraulic circuit.