我矿用来推筑尾矿坝的设备是TSY220推土机。该推土机从投产至今已运行十余年。由于尾矿呈颗粒状,推土机在作业时,尾矿极易随着履带、链轮的运转进入终传动箱内,成为研磨介质,使得本不易磨损的链轮半轴出现严重磨损,必须更换。而半轴是水平装在后桥箱及主机架上的,它与后桥箱孔 My mine used to build tailings dam equipment is TSY220 bulldozer. The bulldozer has been in operation for more than ten years. Due to the granularity of the tailings, the bulldozer can easily enter into the final drive box with the operation of the crawler and sprocket as a grinding medium during bulldozer operation, which makes the semi-shaft of the easily worn sprocket seriously worn and must be replaced. The axle is installed horizontally in the rear axle box and the main frame, with the rear axle box hole