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Determining of Oil Change Interval of Tractors
 Pavlišta, Libor ; Hönig, Vladimír (advisor) ; Mařík, Jakub (referee)
The aim of this diploma thesis was determination of tractor engines oil drain interval. In theoretical chapters is described theoretical background of the field of engines lubrication and issue of use of motor oils in practice. The drain intervals were determined using a tribotechnical diagnosis of collected samples of a motor oil from tractors. The analysis of the samples were processed in a laboratory and the dominant parameters that influence the wear of the oil were detected. On the basis of the application of a trend analysis were determined the reference values of the levels of oil degradation. After taking the evaluation and discussion of the results were defined oil drain intervals for the tractors. At the end there was made an evaluation of the results and operational recommendations. The thesis includes also an economical evaluation.
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