1. The meshing marks and tooth side clearance of the active and driven bevel gears are inconsistent, the gears are damaged, and the bearings are excessively worn, which can cause abnormal noise.
2. The bearing preload is too large, the gear meshing side clearance is too small, the meshing mark is incorrect, and the lubricating oil is insufficient, which can cause abnormal heating. The vehicle should be allowed to leave only after timely cleaning.
3. The tightness of each connection part should be checked frequently. If there is any looseness, it should be tightened immediately to prevent accidents.
4. Check whether there is lubricating oil leakage in each connection part frequently. If found, it should be cleaned in time.
5. The soil inside the vent plug should be cleaned frequently to keep the pores unobstructed. The amount of lubricating oil should be checked frequently to avoid excessive or insufficient.