“特-271”型推土机在使用当中经常发生的故障,是行走机构支承输的切边。一般情况,新设备在铁矿使用二年就会发生这类故障。过去,我矿消除切边故障的方法,是更换梁架。后来因这项备件供应困难,曾采取大修方法,但继续发生切边故障,就一直未能解决。切边故障,是行走链条在运动时不正,引起支承轮边缘被切削。被切削的严重情况曾达到;大修理出厂投产运行两天,下支承轮的边缘就全部被切去。由于切边故障,导致行走机构其他另件或部件的不正常磨损现象也十分突 “Special -271” type bulldozer in the use of which often occurs in the failure, is to support the transport mechanism trimming edge. In general, this type of failure occurs when new equipment is used for two years in iron mines. In the past, my mine method to eliminate trimming faults was to replace the beam. Later, due to the supply of spare parts, overhaul was taken, but the trimming failure continued to be solved. Trimming fault is the walking chain in motion is not correct, causing the edge of the bearing wheel is cut. The serious situation has been cut; large repair factory put into operation two days, under the edge of the support wheel are all cut off. Due to trimming failure, leading to the other parts of the running gear or parts of the phenomenon of abnormal wear and tear is also very sudden