有些TY220推土机在使用中，曾出现行走无力现象。其故障特点是：发动机、液力变矩器运转正常，变速和转向制动亦都灵活无异常，推土机在平坦的地面上能行走，一旦爬坡或推上铲触地，履带立即停止转动。用户把这种现象戏称为“半身不遂”，意思是一切都正常，就是不能工作。有的 Some TY220 bulldozers have experienced walking weakness in their use. Its fault features are: engine, hydraulic torque converter is running normally, speed and steering brake are also flexible and abnormal, the bulldozer can walk on the flat ground, once climbing or pushing the shovel to touch the ground, the track will stop immediately. The user dubbed this phenomenon as “half-fat”, meaning that everything is normal and that it cannot work. some