According to the staff's summary, there are eight common faults in the operation of gear reducers. What are the eight common faults, what are the causes of the faults, and how to deal with them? The following are analyzed one by one. One: The sound of the gear reducer is abnormal or there is noise. Reasons: There are more impurities in the lubricating oil; the gear meshing part is damaged, the gear gap is increased, and the bearing gap is large; the bearing is damaged or worn seriously.