Because the gearbox is installed in an aggressive environment, standard seals quickly leak.
To remove the dirt, a so-called "metal labyrinth seal" has been used in a special bush so it can set itself in the cover. This removes moisture and dirt before it can cause damage to the seals.
In addition, the teeth have been ground again and the adjustment has been made correctly, so that the cabinet can be used optimally again and can perform its work for a long time.