【 Doosan 300-7 Second-hand Excavator This second-hand Doosan 300-7 excavator is a very popular medium-sized excavator in the market. It only comes with a bucket and is highly suitable for use in scenarios such as urban construction sites, mining, and farmland water conservancy. This excavator has a working time of only 11 hours and can almost be regarded as a nearly new car. Its overall performance and appearance are both well maintained. In terms of the power system, the Doosan 300-7 is equipped with an efficient and energy-saving engine, which can provide strong and stable power output and perform well even in harsh environments. This engine not only has abundant power but also excellent fuel economy, which can help users effectively reduce operating costs. The hydraulic system adopts advanced load sensing technology, which can automatically adjust the flow rate according to the actual working load to ensure more stable and smooth operation. Meanwhile, the efficient cooling system design ensures the stability of the hydraulic oil temperature during long-term operation, thereby extending the service life of the entire hydraulic system. In addition, this machine is also equipped with multi-stage filtration devices, further enhancing2025-12-10 16:55:33