1.1 This test method covers a constant volume high-pressure vane pump test procedure for indicating the wear characteristics of petroleum and nonpetroleum hydraulic fluids.

Note 1-While this test method has been used to measure fluid viscosity retention or shear stability of polymer-thickened fluids, the suitability and precision of shear stability testing has not been determined. The sample size or pressure loading device, or both, can have a significant effect on the severity of fluid shearing and these parameters have not been standardized.

1.2 The values stated in either acceptable metric units or in other units shall be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system must be used independently of the other, without combining values in any way.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Notes 7, 15, and 24.