柴油发电机组开机运行前的准备工作有如下几点：
1、将附着柴油发电机的水迹、油迹和铁绣等杂物清除干净。
2、对发电机组各装置全面巡视一遍，检查各连接、紧固和操纵部分是否都已装接牢固妥当，串透式减震器（即紧固螺栓穿过底脚减震垫及底架）的螺母不得拧得过紧（即该螺母旋至与底脚刚接触的位置为止，此时两个螺母必须相互锁紧，以防松脱），否则会使减震失效。
3、检查油箱内燃油储存量是否满足需要。
4、检查柴油机油底壳及喷油泵、调速器内的机油量是否足够。
5、向水箱（即散热器）注满冷却永。
6、检查所有电气部分，各接点应牢固正确，自动空气开关应处在“断开”位置，检查蓄电池能否正常工作，并注意启动系统一般为负极搭铁。
7、柴油发电机组间断一段时间再运行时，必须先用500V兆欧表测量发电机各绕组和控制系统对地的绝缘电阻，常温下应不低于2兆欧，若绝缘电阻低于上述数值，必须进行干燥处理。
The preparation work before starting the diesel generator set is as follows:
1. Clean up any water stains, oil stains, iron rust, and other debris attached to the diesel generator.
2. Conduct a comprehensive inspection of all components of the generator set to ensure that all connections, fasteners, and control parts are securely and properly installed. The nuts of the through type shock absorber (i.e., the fastening bolts that pass through the foot cushion and chassis) must not be tightened too tightly (i.e., the nuts must be tightened until they just come into contact with the foot, at which point the two nuts must be locked together to prevent loosening), otherwise it will cause the shock absorber to fail.
3. Check if the fuel storage capacity in the fuel tank meets the requirements.
4. Check whether the oil level in the diesel engine oil pan, fuel injection pump, and governor is sufficient.
5. Fill the radiator with cooling fluid.
6. Check all electrical components and ensure that all contacts are secure and correct. The automatic air switch should be in the "off" position. Check if the battery is working properly and note that the starting system is generally grounded to the negative pole.
7. When the diesel generator set is interrupted for a period of time before operation, a 500V megohmmeter must be used to measure the insulation resistance of each winding and control system of the generator to ground. At room temperature, the insulation resistance should not be less than 2 megohms. If the insulation resistance is lower than the above value, drying treatment must be carried out.
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