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我单位一台ＷＹ８０型全液压履带式挖掘机，在工作４ ０００ ｈ后出现行走及各种动作均缓慢无力的现象，机器行走时即使履带碰上一块砖头也不能越过，并且向右跑偏严重。 该机液压油路采用的是双泵双回路高压恒功率变量系统和液压先导操纵系统。 按照故障排除“由简到繁”的原
I unit a WY80 full hydraulic crawler excavator, walking 4 000 h after work and all kinds of movements are slow and weak phenomenon, the machine even if the track hit a brick can not cross the track, and ran to the right serious . The hydraulic circuit is used in the double-pump dual-circuit constant pressure high-power variable-speed system and hydraulic pilot control system. According to the troubleshooting “from simple to complex” original