It depends. Some people learn from scratch, which takes a long time; And some people themselves have a certain foundation, which can be mastered quickly under the guidance of teachers. It usually takes 3-6 months to learn, and it takes at least two years if you want to be fully familiar with it. Due to the heavy workload and complex working environment of excavators, it is inevitable that various failures will occur after long-term use. Excavator maintenance refers to the maintenance of excavator's own equipment in daily operation. Equipment maintenance refers to the technical activities to restore the function of equipment after its technical state deteriorates or fails, including all kinds of planned repairs, unplanned fault repairs and accident repairs. Also called equipment maintenance. The basic contents of equipment maintenance include equipment maintenance, equipment inspection and equipment repair.