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1.故障现象1台日立ZX200-3型挖掘机,在使用过程中出现铲斗缸溜缸故障。该故障刚开始出现时不明显,只在动臂提起后铲斗有轻微下落现象,当时认为是铲斗缸内泄漏造成,没有及时处理。该挖掘机继续工作1个多月后,铲斗缸溜缸逐渐严重,已不能进行正常挖掘作业。经技术人员现场检测,在铲斗内翻状态下提起动臂后,将操纵杆置于中位时,铲斗缸活塞杆以20cm/min速度缩回,铲斗随即下落;在铲斗外翻状态下完成上述操纵,铲斗缸活塞杆以20cm/min速度伸出,同时铲斗下落。
1. Symptom 1 Hitachi ZX200-3 excavator, shovel cylinder cylinder in the course of failure. The fault was not obvious at first, but only when the boom was lifted, the dipper had slight drop phenomenon. At that time, it was caused by the leakage in the bucket cylinder and was not dealt with in time. The excavator to continue to work more than a month later, the bucket cylinder gradual serious, can no longer normal excavation operations. The technician on-site testing, the bucket in the flip state lift arm, the joystick in the middle, the bucket cylinder piston rod retracts at a speed of 20cm / min, the bucket immediately fall; the bucket eversion When the above operation is completed, the bucket cylinder piston rod extends at a speed of 20 cm / min and the bucket falls.