1台TY220型推土机在使用过程中,出现左、右转向都困难现象,有时甚至无法转向。停机1～2 h后再启动工作,转向系统又恢复正常。但是当转向系统油液温度升至80～90℃时,此故障再次出现。由于此故障频繁出现,致使该机无法正常使用。1.工作原理该机转向离合器采用常接合、湿式多片、弹簧压紧、液压分离结构。推土机直线行走状态下,其两侧转向离合器弹簧的作用力将离合器主、被动摩擦片 1 TY220-type bulldozers in the course of the use of left and right steering are difficult phenomenon, and sometimes can not even turn. Shut down 1 ~ 2 h and then start work, turn the system back to normal. However, when the steering system oil temperature rose to 80 ~ 90 ℃, this fault appears again. Because of this frequent failure, resulting in the normal use of the aircraft. 1. Working principle The machine steering clutch is often joined, wet multi-chip, spring compression, hydraulic separation structure. Bulldozers straight walking, the steering clutch on both sides of the spring force will clutch the main, passive friction plate