Jul. 08, 2021
The main reasons for high water temperature of Volvo diesel generator set are as follows:
1. Unsuitable coolant or insufficient water
Unsuitable coolant or insufficient water will lead to the decline of cooling performance and increase of coolant temperature.
2. Radiator blocked
A large area of the radiator fins fall down, and there are oil sludge and other debris between the fins, which will prevent the heat emission. Especially when the surface of the water radiator of diesel engine generator is stained with oil, the thermal conductivity of the oil sludge mixture formed by dust and oil is smaller than that of scale, which seriously hinders the heat dissipation effect.
3.Incorrect indication of water temperature gauge or warning light
Including water temperature sensor damage,the wrong alarm is caused by the failure of the line iron striking or indicator. At this time, the surface thermometer can be used to measure the temperature at the water temperature sensor to observe whether the indication of the water temperature gauge is consistent with the actual temperature.
4.Fan speed is too low, blade deformation or reverse installation
If the fan belt is too loose, it will slip, resulting in low fan speed and weakened air supply effect. If the tape is too loose, it should be adjusted. If the rubber layer is aged, damaged or the fiber layer is broken, it should be replaced.
5.Cooling water pump failure
If the pump itself is damaged, the speed is too low, the scale deposit in the pump body is too much, and the channel becomes narrow, the coolant flow will be reduced, the heat dissipation performance will be reduced, and the oil temperature of diesel generator set will be increased.
The way to check the thermostat is as follows; Remove the thermostat and suspend it in the container with warm water. At the same time, place a thermometer in the water, and then heat it from the bottom of the container. Observe the water temperature when the thermostat valve starts to open and fully opens. If the above requirements are not met or there is obvious damage, replace the thermostat immediately.
7.The cylinder head gasket is damaged
The method to judge whether the cylinder gasket is burnt is as follows:turn off the diesel engine, wait for a moment, then restart the engine and increase the speed. If a large number of bubbles can be seen on the water radiator filling cover at this time, and at the same time, small water droplets in the exhaust pipe are discharged with the exhaust gas, it can be concluded that the cylinder gasket is damaged.
8.Improper injection time
The injector is not working properly. If the fuel supply advance angle is too early or too late, the contact area between the high temperature gas and the cylinder wall will increase, and the heat transferred to the coolant will increase and the temperature of the coolant will increase. At this time, the diesel engine power will decrease and the fuel consumption will increase. If the injection pressure of the injector drops and the spray is not good, the fuel will not burn completely, and the increase of the exhaust temperature will indirectly lead to the increase of the water temperature.
9.Overload operation of diesel engine
When diesel engine generator is overloaded, it will cause excessive fuel supply. When the heat generated exceeds the heat dissipation capacity of the diesel engine, it will also increase the coolant temperature of the diesel engine. At this time, the diesel engine is mostly black smoke, fuel consumption increases, abnormal sound and other phenomena.
When you meet high water temperature in Volvo diesel generator, you can refer to above reasons. Dingbo Power is also a manufacturer of diesel generators, who has focused on high quality product for more than 14 years, mainly supply 25kva-3125kva diesel generators. If you have plan to buy diesel generator, welcome to contact us by email email@example.com,we will help you to select suitable product and provide you best service.
Jan. 31, 2023
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