ASTM D7043 Standard Test Method for Indicating Wear Characteristics of Non-Petroleum and Petroleum Hydraulic Fluids in a Constant Volume Vane Pump
4. Summary of Test Method
4.1 An amount of 18.9 L +/- 0.5 L of a hydraulic fluid are circulated through a rotary vane pump system for 100 h at a pump speed of 1200 r/min +/- 60 r/min and a pump outlet pressure of 13.8 MPa +/- 0.3 MPa (2000 psi +/- 40 psi). Fluid temperature at the pump inlet is 66 °C +/- 3 °C for all water glycols, emulsions, and other water containing fluids and for petroleum and synthetic fluids of ISO Grade 46 or lighter. A temperature of 80 °C +/- 3 °C is used for all other synthetic and petroleum fluids.
4.2 The result obtained is the total mass loss from the cam ring and the twelve vanes during the test. Other reported values are initial flow rate and final flow rate.
4.3 The total quantity of test oil required for a run is 26.5 L.
5. Significance and Use
5.1 This test method is an indicator of the wear characteristics of non-petroleum and petroleum hydraulic fluids operating in a constant volume vane pump. Excessive wear in vane pumps could lead to malfunction of hydraulic systems in critical applications.
