Komatsu Filter,Komatsu Fuel Filter,Komatsu Excavator Filter,Komatsu Genuine Filter JINING SHANTE SONGZHENG CONSTRUCTION MACHINERY CO.LTD , https://www.sdkomatsuloaderparts.com I have explored from practice to judge the malfunction of the machine by "sound". 1. Judging the fault according to the cause of the sound of the machine (1) A sound produced by the impact of two parts in the impact sound machine. Features: dull, deep and powerful. When repairing, install unqualified bearings due to low precision of bearing rolling elements or inner and outer ring surfaces