Large excavator, whether using steel wire rope or hydraulic pressure, has the characteristics of high efficiency and large output, and is the main force of open-pit mining. With the idea of bigger and better, the large excavator can reach 500-1000t. Unlike other types of equipment, the wheel vehicles such as dump trucks or loaders can be opened back to the workshop for maintenance, and can be towed even if they cannot walk independently. Other types of tracked vehicles, whether they are good at walking bulldozers or drilling rigs, are transported back to the workshop or relatively easy from smaller tonnage. Only large excavator is too heavy to operate, it is difficult to go to the maintenance workshop by itself, especially in the case of failure requiring maintenance. It is not easy to transport the excavator by Trailer. It needs the cooperation of large cranes and is also restricted by terrain, so the trailer may not be able to leave the mine. Generally speaking, large excavators are maintained on site.
The difficulty of maintenance in open-air site is much greater than that of maintenance workshop, no bridge crane is available, and various tools are not available. It is also very difficult to maintain the tools and equipment such as Jack, crane and aerial vehicle in time. In order to improve the efficiency of maintenance and reduce labor intensity, some manufacturers have developed a variety of special tools, which makes the maintenance work easy and fast, and shorten the time used for maintenance. The attendance time of equipment is improved, and the safety risk brought by using various traditional methods is reduced by using professional tools.
