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1.故障现象2016年4月,某用户曾将我公司某型号标配挖掘机的铲斗改装成液压剪。除安装液压剪外,还增设先导手柄、梭阀、多路换向阀以及相应管路等,并将挖掘机主阀上的备用阀用于为液压剪供油的主控阀。改装完成的挖掘机短时间运作正常。之后,除液压剪功能正常外,其余动作都变得缓慢无力,尤其是挖掘机行驶速度变得非常缓慢,地面稍有坡度,挖掘机就无法行驶。
1. Symptom In April 2016, a user once converted a bucket of a standard excavator of our company into a hydraulic scissors. In addition to the installation of hydraulic shears, but also the addition of pilot handle, shuttle valve, multi-way valve and the corresponding pipeline, etc., and excavator main valve on the back-up valve for hydraulic cutting oil supply main control valve. Refit the excavator completed a short period of normal operation. After that, except for the normal function of hydraulic shears, the rest of the movements became slow and weak, especially when the speed of the excavator was very slow and the ground was slightly inclined so that the excavator could not drive.