In the process of performing of technological operations motor-graders are undergone severe loading conditions. The process of working medium development is accompanied by the action of time-varying parameters reluctances on the working equipment. At the situation of operative bodies blocking which are accompanied by intensive vehicle braking loads on working equipment are of shock character and can exceed considerably neutral layer of usual loads. Such loading can lead to the crabbing of the vehicle from projected path of motion. The developed dynamic model of earth-moving machine allows to take into consideration dynamic loads effect on the path configuration of its motion and formulate prompts to stabilize the characteristic signs of earth-moving machine road-holding ability.