Development of a High Pressure Vane Type Hydraulic Pump Test

A small size vane type hydraulic pump test has been developed that simulates a full-scale vane pump operating at high pressures on an off-highway construction vehicle. This paper describes the design of the test rig and the selection of the operating parameters. Results obtained in both the small size and the full-scale pumps are compared. The effects of two ZNDTP type antiwear additives are included in this discussion.