FIELD: agricultural engineering. SUBSTANCE: method involves obtaining information concerning change in loading due to change of pressure in pressure pipeline of hydromechanical power divider; transforming working tool draft into frame height change and working tool motion speed change; accumulating potential energy by raising frame in case draft is increased and consuming potential energy by lowering frame in case speed is decreased. Apparatus has hydraulic working tool lifter communicated with hydraulic coupling. EFFECT: increased efficiency in controlling operation of working units, simplified construction and enhanced reliability in operation. 4 cl, 1 dwg
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