The article shows the adverse factors affecting the working conditions of transport equipment in open quarries of the far North, the statistics of their failures because of the destruction of load-bearing nodes. The formation of cracks in the frames of heavy-duty dump trucks occurs mainly by the mechanism of fatigue in areas of stress concentration. There is a difference in the run up to the appearance of cracks for dump trucks BelAZ-75306 and BelAZ-75131. Their reliability is lower than other foreign counterparts. The complexity of the repair work is twice the complexity of the repair of dump trucks of similar capacity. In article given the basic requirements to the repair welded joints.
heavy dump trucks, resource, open pit mining
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