As a classic medium-sized excavator of Caterpillar, the 320B is a legendary “fortune-making tool” for a generation of engineering practitioners. Launched in 1998, it has been discontinued for many years but is still highly sought after in the second-hand equipment market. With an operating weight of 21.1 tons, it is equipped with a 3066T diesel engine with a rated power of 142 hp, a standard bucket capacity of 1-1.2 cubic meters, a maximum digging depth of 6.7 meters and a maximum digging radius of 9.9 meters, boasting strong power and high adaptability of operating parameters. It is fitted with a twin-pump and dual-circuit hydraulic system, featuring boom and swing priority functions, as well as two operating modes: fine control and driver mode, which can easily handle heavy-duty excavation and fine hoisting, and maintain stable output in various working conditions such as earthworks, road construction and mine excavation. Meanwhile, the whole machine is built with original core components, characterized by sturdiness, durability and low failure rate. The key components are rationally arranged for convenient daily maintenance. The spacious cab, combined with good vision and shock absorption design, greatly reduces the fatigue of operators during long-hour operation, making it an engineering tool that balances high-efficiency operation and durability
