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1.故障现象1台CAT330CL型反铲挖掘机被塌方掩埋后,维修人员对其进行了大修。但是大修后,该机在环境温度25℃以上温度工作达到热机状态后,其挖掘、行走、2.初步分析和排查根据经验分析,造成这一故障现象有2种可能:一是液压系统组件及密封件失效,当油温升高后液压系统产生内泄;二是发动机热机状态动力不足。首先测量液压系统的泵、阀油压,未发现异常。测量液压系统油温为90℃,属正常,于是排除了液压
1. Symptom 1 CAT330CL backhoe excavator was landslide buried, the maintenance staff overhaul it. However, after the overhaul, the machine at the ambient temperature above 25 ℃ temperature reaches the heat engine state, the excavation, walking, 2. Preliminary analysis and investigation based on empirical analysis, resulting in the phenomenon of failure there are two possibilities: First, the hydraulic system components and Seal failure, when the oil temperature rise after the hydraulic system produces internal leakage; the second is the lack of power engine heat engine state. First measure the hydraulic system of pumps, valve oil, found no abnormalities. Measurement of hydraulic system oil temperature is 90 ℃, is normal, so ruled out the hydraulic