我局筑路、养路职工,遵照毛主席关于“要善于去观察和分析事物的矛盾运动,并根据这种分析,指出解决矛盾的方法”的伟大教导,针对东方红-54/75推土机中央传动齿轮易发生打牙的问题,分析原因、寻找措施,取得了一定效果。现总结介绍如下。一、打牙情况1.齿牙打掉大小圆锥齿轮中的一个或相邻数个齿牙的全齿或半齿被打掉。一般情况下,小锥齿轮较严重些;2.齿牙打缺大小圆锥齿轮沿齿圈的端部(约占齿宽的1/5～1/4)被打掉,其中齿 The Bureau’s road building and road maintenance workers follow Chairman Mao’s great teaching on “To be good at observing and analyzing the contradictory movements of things, and based on this analysis, pointing out ways of resolving contradictions.” For Dongfanghong-54/75 Bulldozer Central Drive Gears are prone to teething problems, analyzing causes and finding measures to achieve certain results. The summary is as follows. 1. Teething 1. Any or all of the teeth of the size of the bevel gear or the teeth of the adjacent teeth are knocked out. In general, the small bevel gear is more serious; 2. The size of the beveled bevel gear is lost along the end of the ring gear (about 1/5 to 1/4 of the tooth width), wherein the teeth