1, before driving to check all fasteners, see whether there is loose.
Check the wheel cover are damaged, if have a place to leak.
2, regular observation wheel gear oil is above normal levels and whether contaminated, under normal circumstances of lubricating oil is dark, if there is a white or milky characteristics, suggests lubricating oil water pollution.
3, every 12 months or 100000 km, to set up inspection of the rotating wheels have no ring, bearing is shaking.
4, every 12 months or 100000 km, open the oil injection hole, probe into lubricating oil with magnet check for scrap iron impurities.
Relevant tags: semi-trailer axle