The diesel generator set is mostly caused by the long-term static unit. The various materials of the unit itself will undergo complex chemical and physical changes with engine oil, cooling water, diesel, air, etc., which are mainly manifested in two aspects. It is summarized as follows: The filter filter capacity decreases. The filter plays a role in filtration of diesel, engine oil or water to prevent impurities from entering the body. In diesel oil and impurities are also inevitable. Therefore, during the operation of the unit, the filter plays an important role, but at the same time, these oil or impurities are deposited on the filter wall, causing the filter filter capacity to decrease. If too much is deposited, the oil circuit will not be smooth. In this way, the oil engine will be shocked due to the inability to supply oil (such as human beings lack of oxygen). Therefore, during the use of a normal generator set, the editor of the diesel generator set public platform recommends: 1. Commonly used units are 500. Replace three filters every two years; 2. Replace three filters every two years for the backup unit. Cooling system