No oil may be the thermal oil pump itself mechanical problems. Now the centrifugal pump can not oil the cause of this problem to analyze the pump. The suction range of the oil pump is too large, some oil source is deep, and some oil source

Some users find that the self-priming ability of oil pump gradually decreases after using it for a period of time. Why? First of all, make sure you use a centrifugal oil pump or a gear oil pump or a screw oil pump. Here are some examples: