Oil quality studies of hydraulic systems of agricultural machinery in conditions of dusty air

Abstract

The purpose of this work is to study the performance characteristics of Hydro ISO-68 hydraulic oils operating in hydraulic systems – CLAAS ARION tractors. During operation in hydraulic systems, the oil is heated and intensively mixed with air. The main conditions in which hydraulic oil systems operate are characterized by a wide variation in ambient temperature, the transfer of large forces and the effect of high specific loads in pumps, dustiness and humidity of the ambient air.
As the statistics of hydraulic system failures show, about sixty percent of failures are related to contamination of the working fluid. To achieve this goal, we took samples of Hydro ISO - 68 hydraulic oils from CLAAS ARION tractors and analyzed them according to the main quality indicators. Laboratory physico-chemical and spectral analyses of the oils were carried out according to the established methodology. Analyses show that the waste oil mainly contains wear products in terms of concentration:– iron (Fe) and chromium (Cr), atmospheric dust in the form of (Si) and waste additive products in the form of sulfur (S) and phosphorus (P). Taking into account all the experimental data we have obtained on changes in quality indicators, we recommend additionally adding additives to the engine oil, which consists of phosphorus, sulfur and zinc.