circuit 46 which is powered by engine shaft 36 first variable displacement pump motor 52 directs a hydraulic fluid under low pressure through the second load holding valve 68 and on to the rod side of boom lift hydraulic cylinders 28 also first pilot operated check valve 74 is activated and hydraulic fluid is delivered under low pressure to low pressure accumulator 62 and boom swing hydraulic motor 26 simultaneously second variable displacement pump motor 56 directs a hydraulic fluid under high pressure through bi directional valve 72 to high pressure accumulator 66 also simultaneously charge pump 60 directs a hydraulic fluid under low pressure to low pressure accumulator 62 boom swing hydraulic motor 26 first variable displacement pump motor 52 and second variable displacement pump motor 56 load pressure hydraulic fluid is returned from the head side of boom lift hydraulic cylinders 28 through first load holding valve 54 to first variable displacement pump motor 52 and through first load holding valve 54 and third load holding valve 58 to second variable displacement pump motor 56 according to another configuration of the present invention and referring now to fig1 there is shown a hydraulic circuit 46 u2032 which is powered by engine shaft 36 first variable displacement pump motor 52 directs a hydraulic fluid under low pressure through the second load holding valve 68 and on to the rod side of boom lift hydraulic cylinders 28 simultaneously second variable displacement pump motor 56 directs a hydraulic.