液压挖掘机在使用过程中,经常会遇到启动方面的问题。整机无法启动往往会给机主带来经济损失。本文以一个挖掘机早期故障实例入手,阐述了发动机无法启动的状况,分析其原因并介绍了实施排除故障的方法。某中型液压挖掘机在样机调试时,突然发动机转速急剧下降并熄火,并且无法再启动。具体表现为:当用钥匙启动发动机时,启动电机工作 Hydraulic excavators in the course of the use, often encounter start-up problems. The machine can not start often bring economic losses to the owner. This paper starts with an example of an early failure of an excavator, expounds the situation that the engine can not start, analyzes the reason and introduces the method of implementing troubleshooting. A medium-sized hydraulic excavator in the prototype debugging, suddenly a sharp decline in engine speed and flame out, and can no longer start. Specific performance: When using the key to start the engine, start the motor