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1.故障现象某学院使用1台GJW111型轮胎式挖掘机对学员进行培训,学员操纵挖掘机放下支腿时,左后支腿还没有接触到地面又自动收了回来。将支腿操纵手柄推到最大位置几秒钟后,左后支腿才能完全放下。当收回支腿时,左后支腿在收回过程中又自动下落。因为支腿支撑不稳容易造成挖掘机倾覆,故只能停止培训。2.原因分析针对该故障,教员引导学员进行分析。学员认为,该挖掘机支腿间歇性失去控制的原因可能有以下4个方面:一是支腿缸内漏;二是
1. Symptom A college using a GJW111-type excavator to trainee trainees, trainees to manipulate the excavator to lower the leg, the left leg has not yet reached the ground and automatically received back. After pushing the leg control lever to its maximum position for a few seconds, the left rear leg can be lowered completely. When retracting the leg, the left rear leg automatically falls during the retraction. Because the leg support instability easily lead to overturning excavators, it can only stop training. 2. Analysis of the reasons In response to the failure, trainers guide students to analyze. Students believe that the excavator leg intermittent loss of control may have the following four aspects: First, leg cylinder leakage; the second is