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1.行走无自动怠速一台现代R225LC-7型挖掘机工作800h后,出现行走无自动怠速的故障,自动怠速功能开启时作行走动作,发动机转速不能由怠速升至目标转速。故障可能原因:行走自动怠速压力开关故障;行走先导压力节流孔堵塞;主控单元(CPU)故障;仪表盘或线束故障。
1. Walking without automatic idle speed A modern R225LC-7 excavator 800h after work, there is no automatic running idle failure, automatic idle function is turned on for walking action, the engine speed can not be increased from the idle speed to the target speed. Possible causes of the malfunction: walking automatic idle pressure switch failure; walking pilot pressure orifice blocked; main control unit (CPU) failure; dashboard or harness failure.