Drive Shaft A2123307900 For Mercedes W212 4-MATIC

Oil leakage of automobile semi-axle is a common problem, which may be caused by the following reasons:

1. Aging or damage of seals: The seals on the axle shaft, such as shaft seals and bearing sealing rings, will age or be damaged externally over time, resulting in oil leakage. The aging or damage of the seal will make the lubricating oil leak out from the joint or bearing of the half shaft.

2. Damage of threaded hole: If the threaded hole at the joint of the axle shaft is damaged or worn, the bolt at the joint may not be fastened, resulting in leakage of lubricating oil from the threaded hole.

3. Bearing damage: If the bearing on the axle shaft is damaged or worn, the lubricating oil will leak from the bearing. Bearing damage may be caused by long-term use or high-load conditions.

4. Overfilling: When replacing the lubricating oil, if it is overfilled or improperly filled, the pressure of the lubricating oil will be too high, which is beyond the tolerance range of the seal, thus causing oil leakage.

5. Improper installation: During the installation of the axle shaft, if the seal is not installed correctly or is not installed firmly, it will also lead to oil leakage. Improper installation may damage or displace the seal, resulting in leakage of lubricating oil.

To sum up, the causes of oil leakage of automobile semi-axle may include aging or damage of seals, damage of threaded holes, damage of bearings, over-oiling and improper installation. Timely inspection and maintenance of the axle shaft to ensure that the seal is intact, the bearing is normal, the lubricating oil is appropriate, and it is installed correctly, which can effectively prevent the occurrence of oil leakage and ensure the normal work of the transmission system and the driving safety of the vehicle.