Four is to add the oil is not adequate.If the oil too much, easy to burn the oil when engine is running, formation of carbon deposition, if too little, will hold shaft tile burning due to bad lubrication.In general the oil surface oil dipstick scale up and down between the most appropriate.
5 it is caused by long-term overloaded tile burning.Long-term overload operation, high temperature, engine speed is low, the bearing capacity of the bearing shell increases, the oil pump oil less, combined with the oil viscosity at high temperature is reduced, it is easier to cause burning.
Six is fitting clearance of shaft and tile does not conform to the standard.Gap is too small, the oil is not easy to enter, forming oil film layer, clearance is too large, the oil easy to loss, also it is difficult to form the oil film layer.So in repair assembly time, must ensure that the bearing clearance within the scope of the standard.
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