维修技术案例分析

                                                                                       编号：CKCMG-JAL-07-080

编号                                类别                  关联内容  

                                       电路              空调面板无显示          

机型       微挖       B92  B93  B94  B128       B130       B132       其它

                                                                                          √   

故障现象： 整机号：YC10-C5037                                     

                            工作时间：2900 小时                                    

                            工作状况：    矿山采石                                  

                           故障现象：该机每天都会出现冷却水不足报警,                                     

原因分析：             

                     1.出现冷却水报警后检查副水箱发现副水箱冷却水特别多,而主水箱里确实缺水了, 

                     先怀疑是水箱盖或主副水箱之间的连接管道有问题,全部更换后故障依然存在.                                       

                    2.打开水箱盖后将发动机处于高油门发现水箱里有大量气泡冒出,所以初步判断为 

             缸垫被冲破.                                        

                    3.做断缸实验发现断5缸后观察水箱气泡明显减少,判断为5缸处缸垫被冲破                                         

                    4.拆开缸盖后发现缸垫在5缸附近的螺丝孔损坏                                       

处置方法：                                                       

              更换缸垫