Importance of Mechanical Testing of Hydraulic Fluids

Anti-wear properties of hydraulic fluids are important because hydraulic pump and motor wear is costly. Hydraulic fluid performance specifications represent minimum requirements. International hydraulic fluid performance standards are being developed by ISO/TC28/SC4 committee as draft (ISO DIS 11158 "Specifications for Mineral Oil Hydraulic Fluids"). Performance specifications for non-mineral oil hydraulic fluids are also being developed.