Brand
Komatsu excavators have always been one of the best-selling brands in China's second-hand excavator market. Whether in terms of its performance or the accessories purchasing market, it is the preferred brand among experts. Hot selling models now include pc55, pc130, pc160, pc200, pc220, pc240, pc350, pc450. Whether it is an excavator or other construction machinery, the performance of chenille brand construction machinery is stable and well known. When buying used machinery, it is important to first choose a well-known brand.
Project Supporting Conditions
Large-scale earthwork projects and medium-sized open-pit mining projects should consider multiple factors when purchasing heavy machinery. For general small and medium-sized projects, such as road maintenance and farmland water conservancy, you only need to use ordinary excavators, such as excavators between 20 and 25 tons. When purchasing an excavator, you should consider the compatibility of your existing equipment, including the matching of the excavator's operating efficiency with the operating efficiency of your existing equipment. Although small excavators are cheap, they are not compatible with large dump trucks, resulting in waste.
Working Conditions and Construction Fluidity
Things to note when selecting the walking part. Crawler excavators have a wide range of uses, so there are relatively more. It is characterized by large traction, low ground pressure (generally 0.04-0.15MPa), good stability, good off-road performance and climbing performance, and is more suitable for construction under harsh working conditions. According to the ground conditions, a standard crawler excavator is generally selected. If the working ground has strong bearing capacity and the ground is uneven, choose an excavator with narrow crawler shoes. If the bearing capacity of the working ground is poor and the soil is loose, an excavator with a longer track and wider track shoes should be selected. If the project is to be constructed in swamps, a crawler excavator specially designed for swamps should be selected. Wheeled and pontoon excavators are relatively less used. The tire excavator is characterized by high transmission efficiency, fast travel speed, good maneuverability and good mobility. It is generally used in places where the working conditions are good and the construction site is frequently moved. Floating excavators are generally used for cleaning silt deposits in riverbeds, rivers and lakes.
Things to note when selecting the working device. The excavator working device includes the boom, dipper, bucket, and related cylinders and hydraulic pipelines. For river dredging projects, you can choose to extend the arm to increase the excavation range. Mining rock excavators with high working intensity need to be equipped with reinforced and thickened boom arms to cope with harsh working conditions. As for the bucket, according to different excavation conditions, you can also choose the standard bucket for general working conditions, the large bucket for soft earth, the rock bucket for rock working conditions, and the dredging bucket for dredging. The bucket part can also be replaced with a crusher, which can be fully used to crush large rocks. Compared with gunpowder blasting, small-volume crushing is much safer, easy to operate and highly efficient. The bucket can also be replaced with a grab fork or grab bucket for the disposal of some waste materials. There are many other things that can be installed, such as: tillers, mashers, cutting blades, pile drivers, etc. For construction sites with special working conditions, it is necessary to consider whether to install a cylinder protection cover to prevent falling objects or obstacles from damaging the cylinder. Machines working on ships or in ports sometimes need to be equipped with a hook device to facilitate lifting vehicles.