Doosan 300-7 second-hand excavators are on sale now. This is a second-hand Doosan 300-7 excavator with outstanding performance and in good condition, suitable for various engineering operation requirements. Since its commissioning, the cumulative working time of this equipment has been only 4,500 hours, which is far lower than the average service life of similar equipment, ensuring its good mechanical condition and long service life. In terms of the power system, this machine is equipped with a high-performance Cummins engine, which is renowned for its powerful output and smooth operation characteristics, and can easily handle the high-load operation requirements under various complex working conditions. Meanwhile, the efficient fuel economy design enables a relatively low operating cost to be maintained even during long-term construction. The hydraulic system adopts advanced negative flow control technology, ensuring more precise and smooth operation of the entire machine. Both the digging force and the rotation speed have reached the leading level in the industry. In addition, this system also has a self-protection function. When encountering abnormal situations, it can automatically adjust to avoid damaging key components, greatl2025-12-20 22:59:39