Diesel Injector Fuel Injector 0445120313 Bosch for Man Truck/Bus Engine

7. Too high oil pressure can also cause crankshaft oil seal oil leakage. At this time, it is necessary to check whether the oil reducing valve works normally.

8. Crankshaft oil seal is not clean when assembling, crankshaft coin 50-8.os millimetre journal has debris or iron, so the cleanliness of the oil seal and crankshaft should be maintained when assembling.

The reasons for oil seal leakage of the old crankshaft are as follows :1. The lip of the oil seal is worn and should be replaced with a new one.

2. If the clearance between crankshaft spindle neck and spindle tile is too large or the axial clearance of crankshaft is too large, the spindle tile should be replaced and the axial clearance of crankshaft should be adjusted.

3. Due to the long-term operation of the crankshaft, the crankshaft journal in contact with the lip of the oil seal has worn out a deep dent, then attention should be paid to the best when assembling the oil seal lip and the dent inside the journal contact, such as the crankshaft 50-8.os mm journal without corrosion or corrosion is not serious, can also make the oil seal installed a little, in short, to avoid the crankshaft journal grinding out the groove, If the above methods can not solve the problem, you should replace the crankshaft.

4. Cylinder liner, piston, piston ring wear, resulting in a serious reduction of the negative pressure value in the crankcase, in addition to the crankcase plastic vent pipe is not connected to the intake pipe on the vent pipe joint, or respirator blockage, in addition to the static joint surface oil leakage, will also cause crankshaft oil seal oil leakage, then should be replaced by wearing parts, connected to the ventilation plastic pipe or cleaning respirator components.