Evaluation of Pollution of Newly Developed Biodegredable Fluid during Accelerated Laboratory Tests

Our study focused on evaluation of pollution from newly developed synthetic, biodegradable fluid MOL Farm UTTO Synt, produced by Slovnaft Company, member of MOL Group, Hungary. Fluid was subject of accelerated test in laboratories owned by Department of Transport and Handling, Faculty of Engineering, Slovak University of Agriculture in Nitra. Accelerated laboratory test was realized by cyclic pressure loading of hydrostatic converter. Hydrostatic pump UD 25, used in latest tractors Zetor Forterra, was selected for testing with cyclic pressure loading for the period of 106 cycles. Within selected intervals (250 000 cycles), a sample of hydraulic fluid extracted from test device was a subject of ferrographic analysis detecting a level of pollution according to ISO 4406 Cleanliness code. Based on pollution evaluation results of newly developed fluid, considering creation of pollution particles, it is possible to monitor a process of hydrostatic pump UD 25 break-in until 500 000 cycles of pressure loading. Ferrographic analysis compared detected wear particles to particles from wear particles atlas. Only particles of adhesive wear were detected by method of comparison, which proves good operational properties of tractor hydrostatic pump with newly developed synthetic, biodegradable fluid.