FIELD: hydraulic systems of excavators. SUBSTANCE: hydraulic drive of excavator has hydraulic cylinders connected to pressure and discharge hydraulic lines through hydraulic distributors for turning tractor and moving tracks. The hydraulic distributor of tracks has one four-position valve with closed inlet lines in the neutral position and outlet lines. Inlet lines are connected to previously free outlet lines of the hydraulic distributor. Outlet lines communicate in pairs with inlet lines in each working position. EFFECT: enhanced efficiency. 4 cl, 7 dwg
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Authors
Dates
1994-05-30—Published
1991-04-05—Filed