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ＥＸ４００ＬＣＨ－３型挖掘机在作业时，突然出现全机（包括工作装置、行走装置和回转装置）无力现象，但在空运转时全机又恢复正常。 一般情况下，宜分别检查下面几个部分后再作最终诊断。 （１）燃油系统 经检查，该机燃油管路通畅、柴油滤芯无堵塞，整个燃油系统无问题。 ?
When the EX400LCH-3 excavator was operating, the whole machine (including working device, traveling device, and rotary device) suddenly appeared powerless, but the machine returned to normal when it was idle. Under normal circumstances, the following sections should be examined separately for final diagnosis. (1) Fuel system After inspection, the fuel line of the machine is unobstructed and the diesel filter is unblocked. There is no problem with the entire fuel system. ?