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１故障现象一台Caterpillar３３０BL型挖掘机左行走部分出一了故障：当机器向后直线行走时，如右操纵杆保持不变，左边回中位（即停车），此时右履带继续倒退，而左履带滑移８００～１０００mm后才停止。２测试方法经分析液压系统图（如图１）后判断，可能引发上述故障的部位有
1 Trouble phenomenon A left-hand-moving part of a Caterpillar 330BL excavator broke down: When the machine was walking straight in the back, the right joystick remained unchanged and the left side was in the neutral position (ie, parked) Left track slip 800 ~ 1000mm before stopping. 2 test methods After the analysis of hydraulic system diagram (Figure 1) to determine the potential cause of the above-mentioned fault site