Fuel and oil mixing of the common faults

1) fuel pump the pump membrane rot or unglued, the diesel into the oil pan and oil mixed. Remove the fuel pump, oil pump test bench into the tubing and the tubing plus 3 kg / cm pressure, If no leakage of diesel fuel pump is intact.

2) Injector opening pressure is low, poor atomization, diesel oil pan and oil mixed flows along the cylinder wall. Remove the injector Injector opening pressure in the high pressure fuel pump test bench test to meet the requirements, good atomization, fuel injector is intact, otherwise, it is necessary for repair or replacement.

3) the front of the fuel injection pump oil spill, that the failure of the fuel injection pump front oil seal, remove the gear chamber cover inspection hole cover, if we find a large number of diesel spray from behind the fuel pump drive gear can be concluded that Diesel is a fuel pump leak into the oil Bottom mixed with oil. Remove the fuel injection pump high pressure pump test bench test; injection pump front-end gear journal at the oil seal deformation, a large number of drain diesel, oil seal seat (material is aluminum alloy) removing the gear, the use of special tools screw top marks (indentation) the oil seal seat and seal deformation caused by leakage of diesel, and finally replace the fuel pump, the fault is radical. M8 screw this description of the problem, removing the fuel injection pump is not too long, the best in 60mm, otherwise it will top bad high pressure oil pump oil seal on the front seat, damage to the high pressure fuel pump.

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