FIELD: hydraulic shifting of working member from one position into another. SUBSTANCE: system has a pump for hydraulic liquid, hydraulic cylinder and pressure accumulator. Valve of hydraulic liquid moves between the first and second positions. In the first position, valve directs liquid from pump outlet to hydraulic cylinder and from accumulator to pump inlet. In the second position it directs liquid from pump outlet to accumulator and from hydraulic cylinder to pump inlet. So hydraulic liquid under pressure from cylinder can be held in stock in accumulator for reuse. High-pressure seals provided at both ends of drive shaft in pump are designed to decrease or remove displacement forces increasing friction and wear. EFFECT: improved reliability and increased service life. 7 cl, 6 dwg
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