Why Are Diesel and Engine Oil Mixed in Volvo Diesel Generator Sets

Aug. 23, 2021

Diesel and engine oil play different roles in the operation of Volvo diesel generator sets. Although both are the main power sources of diesel generators, they cannot be mixed because they will not only affect fuel combustion efficiency and reduce the working efficiency of Volvo diesel generator sets will cause unit operation failures and affect the service life of the unit in the long run. Once the diesel and engine oil are mixed, it means that there is a problem with the seal of the unit. Therefore, in daily use, the user must master certain methods of handling unit failures caused by the mixing of diesel and engine oil. In this article, Dingbo Power will introduce to you the causes of the mixing of diesel and engine oil in Volvo diesel generator sets and the treatment methods after mixing.



 

Why Are Diesel and Engine Oil Mixed in Volvo Diesel Generator Sets

 

 

1. The fuel injector has low opening pressure and poor atomization, which makes diesel fuel flow into the oil pan along the cylinder wall to mix with the engine oil. Remove the fuel injector and test it on the high-pressure fuel pump test bench. Assuming that the opening pressure of the fuel injector meets the requirements and the atomization is good, it is clear that the fuel injector is intact. Otherwise, it must be repaired or replaced.

 

2. The pump membrane of the oil transfer pump is rotten or degummed, causing the diesel to flow into the oil pan and mix with the engine oil. Remove the oil transfer pump, add corresponding pressure to the oil inlet pipe and the oil outlet pipe on the oil pump test bench. Assuming that no diesel leakage is found, it is clear that the oil transfer pump is intact.

 

3. Oil leakage at the front end of the fuel injection pump, that is, the oil seal at the front end of the fuel injection pump is invalid. Remove the gear chamber cover and check the hole cover. If a large amount of diesel is sprayed from behind the drive gear of the generator fuel injection pump, it can be concluded that the diesel is leaking from the fuel injection pump. The oil inlet pan is mixed with the engine oil. Disassemble the fuel injection pump and test on the high pressure fuel pump test bench. It is found that the oil seal at the front gear journal of many fuel injection pumps is deformed, a lot of diesel oil is leaked, and the generator oil seal seat has traces (indentation marks) when the gear is dismantled. ) The oil seal seat and the oil seal are deformed, causing diesel oil leakage, so that the fuel injection pump is replaced, and the fault can be dealt with.

 

Through the above introduction, we believe the majority of users will understand that once the diesel and engine oil are mixed, it means that there is a problem with the sealing of the unit. Therefore, in daily use, the user must master certain methods of handling the unit failure caused by the mixing of diesel and engine oil. So that the Volvo diesel generator set can deal with it in time when the diesel and engine oil are mixed.

 

When purchasing generator sets, you must consult with professional OEM manufacturers. Welcome to Guangxi Dingbo Power Equipment Manufacturing Co., Ltd. Our company’s supporting power of Dingbo series diesel generator sets includes Yuchai, Shangchai, Weichai and Volvo of Sweden, Cummins of the United States, Deutz of Germany as well as other well-known diesel engine brands at home and abroad. We can provide you with one-stop service of product design, supply, debugging and maintenance. If you are interested to purchase any type of diesel generator, please do not hesitate to contact us by dingbo@dieselgeneratortech.com.

 


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