Why should diesel generators be maintained at intervals? Due to the long-term static state of the diesel generator set, various materials of the set will undergo complex chemical and physical changes with engine oil, cooling water, diesel oil, air, etc., which may lead to the following failures of the set.

1、水进入柴油机，由于空气中水气在温度的变化发生冷凝现象，结成水珠挂附在油箱内壁，流入柴油，致使柴油含水量超标，这样的柴油进入发动机高压油泵，会锈蚀耦合件柱塞，严重的会损坏机组，定期维护即有效可避免。

1. When water enters the diesel engine, due to the condensation of water and gas in the air at the temperature change, it forms water droplets to hang on the inner wall of the oil tank and flows into the diesel, resulting in the water content of the diesel exceeding the standard. Such diesel entering the engine high-pressure oil pump will rust the coupling plunger and seriously damage the engine set. Regular maintenance can be effectively avoided.

2、机油变质，机油的保持期（二年）发动机的机油是机械润滑作用，而机油也有一定的保持期，长时间存放，机油的物理化学性能会发生变化，造成机组工作时润滑状况恶化，容易引发机组零件损坏，所以润滑油要定期更换。

2. The engine oil deteriorates and its retention period (two years) the engine oil acts as mechanical lubrication, and the engine oil also has a certain retention period. If it is stored for a long time, the physical and chemical properties of the engine oil will change, resulting in the deterioration of the lubrication condition of the unit during operation, which is easy to cause damage to the unit parts. Therefore, the lubricating oil should be replaced regularly.

3、三滤的更换周期

3. Replacement cycle of three filters

滤器是起到对柴油、机油或水过滤作用的，以防杂质进入机体内，而在柴油中油污、杂质也是不可避免的存在，所以在机组运行过程中，过滤器就起到了重要作用，但同时这些油污或杂质也就被沉积在滤网壁上而使滤器过滤能力下降，沉积过多，油路将无法通畅，这样油机带载运行时将会因油无法供给而休克，所以正常发电机组在使用过程中，我们建议：

The filter is used to filter diesel oil, engine oil or water to prevent impurities from entering the engine. Oil stains and impurities in diesel oil are also inevitable. Therefore, the filter plays an important role in the operation of the unit. At the same time, these oil stains or impurities are also deposited on the filter screen wall, which reduces the filtering capacity of the filter. If they are deposited too much, the oil circuit will not be smooth, In this way, the oil generator will be shocked due to the lack of oil supply during on load operation. Therefore, we suggest that during the use of normal generator units:

（1）常用机组每300小时更换三滤；

(1) Replace the three filters of common units every 300 hours;

（2）备用机组每一年更换三滤。

(2) The three filters of the standby unit shall be replaced every year.

4、冷却系统

4. Cooling system

水泵、水箱及输水管道长时间未作清洗，使水循环不畅，冷却效果下降，水管接头是否良好、水箱、水道是否有漏水等，如果冷却系统有故障，导致的后果有：

The water pump, water tank and water transmission pipeline have not been cleaned for a long time, resulting in poor water circulation, reduced cooling effect, whether the water pipe joints are in good condition, whether the water tank and water channel are leaking, etc. if the cooling system is faulty, the consequences are:

（1）冷却效果不好而使机组内水温过高而停机。

(1) The cooling effect is not good and the water temperature in the unit is too high to shut down.

（2）水箱漏水而使水箱内水位下降，机组也会无法正常工作（为防止在冬季使用发电机时，水管冻结，我们建议在冷却系统中安装水加热器）。

(2) If the water level in the water tank drops due to water leakage in the water tank, the unit will not work normally (in order to prevent the water pipe from freezing when the generator is used in winter, we recommend installing a water heater in the cooling system).

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