某些机手认为,换件修理很简单,把损坏的零件装上去就行了。其实不然,若装配不当,轻则使功率下降,油耗增加,启动困难;重则损坏机器。因此更换新件有讲究。(1)购买新件时须注意零件质量,鉴别伪劣次品; Some drivers believe that the replacement repair is very simple, put the damaged parts on it. In actual fact, if improper assembly, ranging from the power down, fuel consumption increases, difficult to start; heavy damage to the machine. So pay attention to the replacement of new pieces. (1) the purchase of new parts must pay attention to the quality of parts, to identify inferior goods;