在农机维修中,有些机手和维修人员为图省事、节省成本,会使一些“小聪明”。其实,有不少“小聪明”是不可取的,甚至会产生相反的效果。安装活塞鞘不要明火加温。由于活塞鞘座处较厚,其他部分较薄,明火加温后的热膨胀系数很大,容易使活塞变形。一般明火加温温度较高,在自然冷却过程中,里边的金属组织受到破坏,因而降低 In the maintenance of agricultural machinery, some gurus and maintenance personnel are trying to save money and make some “smart” ones. In fact, there are quite a few “smarties” that are not desirable and may even have the opposite effect. Install the piston sheath do not open the fire heating. As the piston sheath thick seat, the other part of the thinner, the fire after the thermal expansion coefficient of large, easy to deform piston. Generally open flame heating temperature is higher, in the natural cooling process, the inside of the metal organization is damaged, thus reducing