新的或经过大修后的发动机和拖拉机,在正式使用以前,必须经过一定时期的磨合。因为机器零件在制造过程中,在加工表面存在着不同程度的刀痕,比较粗糙。如不经磨合就直接投入负荷作业,就会加速零件的磨损,使拖拉机发挥不出最大有效功率,并缩短机械使用寿命。不同类型的发动机和拖拉机有不同的磨合规范,应按说明书的规定进行。但磨合过程和注意的问题大致相同。一、拖拉机的磨合 New or after overhaul of the engine and tractor, before the official use, we must go through a period of time running-in. Because the machine parts in the manufacturing process, there are different degrees of machining marks on the surface, relatively rough. If not run into the load directly into operation, it will speed up the wear and tear parts, so that the maximum effective power tractor can not play, and shorten the mechanical life. Different types of engines and tractors have different operating specifications should be carried out according to instructions. But the run-in process and the attention of the problem is roughly the same. First, the tractor running