FIELD: earth-moving machinery. SUBSTANCE: proposed scraper train contains base vehicle coupled with scraper and manually controlled hydraulic system including three- position manual control hydraulic distributor. Hydraulic system is provided with three-position hydraulic distributor installed on one line with three-position manual control hydraulic distributor, bucket lifting-lowering hydraulic cylinders and safety valve installed on pressure line of hydraulic pump. Traction force checking device is installed between hook of base vehicle and hook of scraper. Said device is connected to provide adjustment of position of three-position hydraulic distributor hydraulically communicating with bucket lifting-lowering hydraulic cylinders. EFFECT: improved reliability in operation. 2 dwg
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