1部分停止法部分停止法,就是短时间停止某部分的工作,观察故障现象的变化情况,以判断故障发生的部位的检查方法。如分析发动机的故障常用的断缸法,发动机发生断续冒烟时,若停止了某缸的工作,冒烟现象消失,则证明故障就发生在该缸。2比较法拖拉机出现故障,当认为某机构零件损坏时,可以用一个标准的零件换下被怀疑的零件,然后观察其工作状况是否有变化。如前述某缸不工作,怀疑是喷油器有问题,就可以用一个同型号的标准喷油器换下可疑的喷油器,使发动机重新工作,如果故障消除了,则证明该缸原喷油器确实有问题。这种方法避免了修理中盲目拆卸和换件。3试探法判断拖拉机故障时,采用试探性的调整和试探性的排除等措施, Part of the stop part of the law to stop the law is a short stop some part of the work to observe the changes in the phenomenon of failure to determine the location of the fault detection methods. Such as the analysis of engine failure commonly used off cylinder method, the engine intermittent smoke, if the stop of a cylinder work, smoke disappears, then prove that the fault occurred in the cylinder. 2 comparison method tractor failure, when a body parts that damage, you can use a standard parts replaced suspected parts, and then observe whether its working conditions have changed. If the cylinder does not work as a suspect that there is a problem with the fuel injector, you can use a standard model of the same injector replaced suspicious fuel injector, the engine to work again, if the fault is eliminated, then prove that the original cylinder spray Oil really does have a problem. This method avoids blind disassembly and replacement during repair. 3 heuristics to determine tractor failure, the use of tentative adjustments and tentative measures such as exclusion,