What Causes Diesel Fuel on Old Diesel Generator to Mix with Engine Oil?

The fuel and oil of the diesel generator have a completely different function. They can't be mixed. Once the fuel and oil are mixed, it means that the seal of the unit has gone wrong, which happens from time to time in use. Today starlight will introduce to you how to do with this kind of situation.

 

1, oil pump membrane rot or degumming, so that diesel oil into the oil tank and oil mixing. When the oil pump is removed and the pressure is added to the oil inlet and outlet pipes on the oil pump test bench, if no leakage of diesel oil is found, the pump is in good condition.

 

2. The injector has low opening pressure and poor atomization, which causes diesel oil to flow into the oil pan and oil along the cylinder wall. The injector is removed and tested on the test bench of high pressure oil pump. If the fuel injection pressure of the injector meets the requirements and the atomization is good, the injector is in good condition, otherwise, it will be repaired or replaced.

 

3.The 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, the check hole cover of the gear chamber cover is removed. If a large quantity of diesel oil is ejected from behind the driving gear of the fuel injection pump, it can be concluded that the diesel oil is mixed with oil from the oil bottom shell from the leaking oil pump. When the fuel injection pump is removed and tested on the test stand of high pressure oil pump, the oil seal at the front gear journal of many fuel injection pumps is deformed, a large amount of diesel oil is leaking, and when the oil seal seat has the disassembly gear, The marks (indentation) of the screw top by special tool deform the oil seal and seal, causing the leakage of diesel oil, finally replacing the fuel injection pump, the trouble can be dealt with.

 

The fuel and oil mixture of the diesel generator set is difficult to find in the early stage, so you must not be careless when observing the operating condition of the unit and the routine maintenance, do not wait until the situation is serious to go to repair, that increases the repair difficulty.