导致柴油发电机组温度偏高的主要原因有以下个方面：

The main reasons for the high temperature of diesel generators are as follows:

1)冷却液选用不当或水量不足冷却液选用不当或水量不足都会导致冷却性能下降，使冷却液温度升高。

Improper selection of coolant or insufficient amount of water will cause the cooling performance to decline and increase the temperature of the coolant.

1)水散热器堵塞。水散热器的散热片大面积倒伏，散热片间有油泥杂物等堵塞，会阻止热量的散发。特别是当水散热器表面沾有机油时，尘土和机油形成的油泥混合物的导热系数比水垢的更小，严重阻碍散热效果。

Blockage of radiator .The radiator fins large area fall down, and there are blockages such as sludge and debris between the fins, which will prevent heat dissipation. Especially when the surface of the radiator is stained with organic oil, the thermal conductivity of the sludge mixture formed by dust and engine oil is smaller than that of scale, which seriously hinders the heat dissipation effect.

1)水温表或警示灯指示有误包括水温传感器损坏;线路打铁或指示表失灵，导致误报警。此时，可采用表面温度计测量水温传感器处的温度，观察水温表指示是否与实际温度相符。

Wrong indication of water temperature gauge or warning light includes damage to water temperature sensor,line strikes or indicator malfunctions, resulting in false alarms. At this time, you can use a surface thermometer to measure the temperature at the water temperature sensor and observe whether the indication of the water temperature gauge matches the actual temperature.

1)风扇转速太低，送风效果减弱。如发现皮带过松应予调整，若橡胶层老化，损坏或纤维层折断，则应更换。

The fan speed is too low, and the air supply effect is weakened. If the belt is found to be too loose, it should be adjusted. If the rubber is aging, damaged or the fiber layer is broken, it should be replaced.

1)冷却水泵故障。水泵本身损坏，转速过低，泵体内水垢沉积过多，通路变窄都会使冷却液流量变小，散热性能降低，使柴油发电机组油温升高。

The cooling water pump failed.The water pump is damaged, the speed is too low,too much scale deposition in the pump, and the channel is narrowing will reduce the coolant flow rate, reduce the heat dissipation performance, and increase the oil temperature of the diesel generator.