This article shows the static analysis of rear suspension beam loading in a combine harvester manufactured by New Holland Bizon Sp. z o.o. The model of the examined machine with thresher rotor (Z110 model) was being manufactured until 2001, and further modifications of combine harvesters with the mentioned threshing system are being made so far [1]. The research conducted with the use of programs: Inventor 2017 for generating the digital model and Nastran In-CAD 2017 for simulation calculations. The aim of this article is to analyze and evaluate the accuracy of the combine harvester Bizon Z110 construction. The findings of the study suggest a possibility of stress accumulation in welded joints of construction. In result, solutions to the described problems were provided.