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There is currently underway a project, which is being conducted by the ASTM D.02N.07 Piston Pump Task Force , to develop a standard high-pressure piston pump test and related pump testing protocol . Various pump tests are being considered including proposals submitted by Komatsu, Rexroth, Denison, Vickers and others . The objective of this paper is to provide an overview of the importance and current status of this work and to outline future directions this work is likely to take.