This article deals with the development of an energy regenerative technology by incorporating an accumulator in the conventional swing drive system of a hydraulic excavator used for mining operations. The accumulator incorporated in the proposed energy regenerative swing system stores the waste energy released during the turntable (superstructure) swing motion of the excavator. The energy stored in the accumulator is used to propel the swing hydromotor along with the main hydraulic pump in the next cycle of the excavator’s swing motion. For the analysis of the proposed system, the detailed simulation model is made in the MATLAB®/Simulink environment. The performance analysis of the proposed swing system is compared with the conventional swing system through simulation. It is observed that the energy saved by the proposed system incorporating an accumulator is 17.79% of the energy consumed by the hydraulic pump of a conventional swing system.