在农业机械维修工作中,经常会遇到发动机的一些疑难故障,用常规的方法来分析其原因和排除这些故障,有时是根本不能解决实质性问题。要顺利分析其原因和排除这些故障,必须运用科学辩证的思维方式,运用逻辑推理和互相联系的方法,根据先易后难、先外后内、由表及里、分段验证、统筹兼顾的原则进行分析、判断、验证,最终确定原因所在,实现排除发动机疑难故障 In the maintenance of agricultural machinery, often encounter some difficult engine failure, using the conventional method to analyze the causes and eliminate these failures, and sometimes simply can not solve the substantive problems. To analyze its causes and eliminate these failures, we must use the scientific and dialectical way of thinking and the methods of logical reasoning and interrelationship to make a comprehensive assessment Principle analysis, judgment, verification, and ultimately determine the reason, to eliminate troubleshooting engine trouble