Jinan jichai diesel generator must clean the fuel oil in the oil tank regularly to prevent water and impurities from appearing in the diesel generator set. Otherwise, impurities or excessive water will appear in the fuel tank of Weichai diesel generator set, and these impurities or water will accumulate on the fuel tank wall and bottom of jichai diesel generator set. If it is not cleaned for a long time, the mud skin will scatter and the light path will be blocked. Therefore, in daily maintenance, develop good hygiene habits and discharge excess separation boxes and ponding.

过热维修采用数学方法建立电机发热模型。济柴柴油发电机组原则上负责低压电机的热维护。空气滤清器、机油滤清器和燃油滤清器是易损件。当使用超过500小时时，必须更换新的。风扇皮带不能太紧或太松。过紧会加速皮带磨损，缩短使用寿命，增加充电器和水泵的张力，加速济柴柴油发电机组发电机和水泵轴的磨损，增加内燃机的功耗。

The heating model of motor is established by mathematical method. In principle, jichai diesel generator set is responsible for the thermal maintenance of low-voltage motor. Air filter, oil filter and fuel filter are vulnerable parts. When it is used for more than 500 hours, it must be replaced with a new one. The fan belt cannot be too tight or too loose. Too tight will accelerate belt wear, shorten service life, increase the tension of charger and water pump, accelerate the wear of generator and water pump shaft of jichai diesel generator set, and increase the power consumption of internal combustion engine.

过松会使皮带打滑，降低充电器和水泵微风扇的转速，影响散热效率，降低济柴柴油发电机组的充电电压。因此，当皮带太紧或太松时，必须进行调整。永磁发电机位于济柴柴油发电机组头部，与济柴柴油发电机组同轴同步旋转。其功能主要为水轮机调速系统提供信号电源，采集济柴柴油发电机组的频率。除此信号电源外，济柴柴油发电机组调速系统还通过济柴柴油发电机组发电机出口电压互感器获取信号，并向济柴柴油发电机组转速继电器供电。

Too loose will make the belt slip, reduce the speed of charger and water pump micro fan, affect the heat dissipation efficiency and reduce the charging voltage of jichai diesel generator set. Therefore, when the belt is too tight or too loose, it must be adjusted. The permanent magnet generator is located at the head of jichai diesel generator set and rotates coaxially and synchronously with jichai diesel generator set. Its function is mainly to provide signal power supply for hydraulic turbine speed regulation system and collect the frequency of jichai diesel generator set. In addition to this signal power supply, the speed regulation system of jichai diesel generator set also obtains signals through the voltage transformer at the generator outlet of jichai diesel generator set and supplies power to the speed relay of jichai diesel generator set.

如果装置安装时未清洗喷油嘴隔热套，喷油嘴头与隔热套之间有间隙，使燃气进入间隙，济柴柴油发电机组的价格形成隔热散热效果，喷油嘴和隔热套熔化。如果济柴柴油发电机组的隔热套装置太紧，喷油嘴会产生附加应力。在热交变载荷和燃油辐射高压载荷的共同作用下，济柴柴油发电机组喷油嘴头部断裂，针阀卡死，滴油。此外，如果济柴柴油发电机组在维修过程中省略了隔热套，且济柴柴油发电机组的喷油嘴伸入气缸盖下方超过4mm的灭火室，它还将增加济柴柴油发电机组喷油嘴吸收的热量，并燃烧喷油嘴。

If the thermal insulation sleeve of the fuel injection nozzle is not cleaned during the installation of the device, there is a gap between the fuel injection nozzle head and the thermal insulation sleeve to make the gas enter the gap, the price of jichai diesel generator set will form a thermal insulation and heat dissipation effect, and the fuel injection nozzle and thermal insulation sleeve will melt. If the insulation sleeve device of jichai diesel generator set is too tight, the fuel injection nozzle will produce additional stress. Under the combined action of thermal alternating load and fuel radiation high-pressure load, the head of fuel injection nozzle of jichai diesel generator set is broken, the needle valve is stuck and oil drips. In addition, if the insulation sleeve is omitted during the maintenance of jichai diesel generator set, and the fuel injection nozzle of jichai diesel generator set extends into the fire extinguishing chamber more than 4mm below the cylinder head, it will also increase the heat absorbed by the fuel injection nozzle of jichai diesel generator set and burn the fuel injection nozzle.