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This article discusses methods for improving the mechanical part of 2ES6 Sinara series freight mainline electric locomotives to improve their dynamic performance and traction properties. According to statistics, in 2024, mechanical equipment failures of 2ES6 electric locomotives ranked third in terms of the number of malfunctions, accounting for 8,5 % of the total number of unscheduled repairs. Using mathematical modeling, an assessment of the dynamic and traction qualities of locomotives with two types of spring suspension of the axlebox stage (standard and modernized) was made. It was found that at speeds from 40 to 100 km / h, the locomotive with a compensating device accelerates the body by 2 times, and the bogie by 1,8 times lower than similar indicators of a locomotive with a standard springing scheme. A simulation model of the traction motor suspension unit is proposed, which allows estimating the dynamic loading indices of the standard and improved traction motor suspension schemes of the 2ES6 locomotive. The simulation results showed that the stress concentrators in the traction motor housing are its support units, namely, the attachment points of the rod and motor-axial bearings. The simulation results correspond to the statistical data of traction motor failures due to the appearance of cracks in the housing, which confirms the adequacy of the model. An improved design of the traction motor suspension system to the bogie frame of the 2ES6 electric locomotive is proposed to reduce the negative impact of dynamic loads on the traction motor fastening units and the mechanical part of the locomotive. Theoretical studies of the improved design, carried out using a mathematical model, showed that at a locomotive speed of 80 km/h, the maximum stresses at the traction motor control points are reduced by an average of 30 % compared to the standard suspension scheme.