1, check whether the pump and air compressor are normal before work; And check that the pipelines and joints should be free of oil leakage, water leakage and air leakage. 2. Before working, make sure that the operating lever, control device and instrument are in normal state. 3. Walking operation: 1) Before the trolley walks, look around the site to make sure there are no people or obstacles around, and then walk according to the instructions of the guide. Never touch the operating lever by mistake. 2) Walk smoothly to avoid accidents caused by emergency operation, especially when going up and down slopes. Because the body is very long, even if the steering angle is not large, the front and rear ends of the body will swing. ...