ABSTRACT
Assessing the wear performance of tractor hydraulic fluids is an expensive and time consuming process generally involving lengthy field service trials or full-scale tractor evaluations in the laboratory. The test method of interest was a 50 hour full-scale tractor laboratory test used by the industry of measure wear performance of fluids under high temperature, high load, low speed conditions. Based on the information available about the equipment and operating conditions, calculations of critical parameters were made and translated to an FZG test rig for evaluation. The operating conditions of speed, load, temperature, are normally calculated for the full-scale equipment and then translated to appropriate conditions in the smaller test rig. The investigation has shown that a reasonable simulative method can be developed in the FZG test rig if the conditions are chosen on the basis of appropriate calculations. Additional testing should be conducted to establish repeatability and causes of variance before these methods are used to assess lubricant wear performance.
