Uzbekistan produces a number of high-performance agricultural machinery. One of these agricultural machines is the "Dominator 130" combine harvester. Although these machines have been produced in Uzbekistan for about 14 years, there are still some problems during its operation. This article presents the results of the study carried out to determine failures occured during operation of the Dominator-130 and the analysis of the problems, as well as the recommendations for the problem troubleshooting. The specific recommendations are given for the elimination of some certain components and aggregates. The reasons for the most breakdowns that occur in combines are the climatic conditions of Uzbekistan. The definite troubleshooting measures are proposed in the article. The suggested methods for identifying and troubleshooting should increase the machine's performance during its exploitation