The Caterpillar 320B is a classic medium-sized excavator from Caterpillar. The second-hand refurbished models stand out in terms of cost performance in the engineering circle and still have a wide market in infrastructure, mining and other engineering fields. The core value and risks of these models are concentrated on the refurbishment process and the verification of the vehicle condition.
The renovation process needs to focus on addressing three core systems: Firstly, the engine, which aims to solve common problems of old machines such as oil burning and abnormal exhaust, and restore the stability of power output; Secondly, the hydraulic system, where aging and leaking hoses are replaced, pump valve parameters are adjusted, and the pressure and flow of hydraulic pumps and distribution valves are tested with professional equipment to ensure the coordination of movements and the digging force; Thirdly, the mechanical structure, where the shaft holes of the large and small arms are reamed, worn bushings are replaced, the frame is reinforced, and chains, guide wheels, and other wear-prone parts are also replaced. The exterior is refreshed through flatting of the body panels and multiple passes of original factory paint.
When making a purchase, it is necessary to verify the actual working hours and maintenance records. Conduct on-site tests to evaluate key performance indicators such as digging force and rotational flexibility. Prioritize choosing refurbished vehicles from official channels. The second-hand price of these vehicles is affected by factors such as age and working conditions, ranging from several tens of thousands of yuan to over two hundred thousand yuan. A comprehensive assessment should be made based on actual needs and the condition of the vehicle.
