轮式拖拉机有时出现两前轮左右摇摆的现象(前轮摆头)。车速越高摆动得越快。前轮摆头是行走系统及转向机构的故障,它能加速轮胎和转向机构各部件的磨损,严重时易造成转向失灵,发生重大事故。前轮摆头主要原因有:1.两前轮轮胎气压相差过大;2.前轮轴上两锥形轴承〔如东方 Wheeled tractors sometimes appear left and right swinging phenomenon (front wheel swing). The higher the speed the faster the swing. Swinging the front wheel is a failure of the traveling system and the steering mechanism. It accelerates the wear and tear of the components of the tire and the steering mechanism. In severe cases, it can easily cause steering failure and major accidents. The main reasons for the front wheel swing are: 1. Two front tires tire pressure difference is too large; 2. Front two tapered bearings [such as the East