我队一台刚大修过的东方红-75拖拉机下地作业时,起动后拉右操纵杆拖拉机不能行走,拉左操纵杆拖拉机不能转向,经检查发现,从动鼓接盘花键处断裂。更换新件后不过两天,又出现上述故障。原来从动鼓接盘上有很多砂眼,受到外力作用时,在花键处断裂。在此提请生产厂家要注重产品质量,以维护用 My team just overhauled Dongfanghong -75 tractor to work under the ground, pull the right joystick tractor after starting can not walk, pull the left joystick tractor can not turn, after examination found that the driven drum disc spline at the fracture. However, two days after the replacement of new parts, the above-mentioned malfunction occurred again. The original slave drive drum plate has a lot of trachoma, when subjected to external forces, broken at the spline. In this draw to the manufacturer to pay attention to product quality, to maintain