For the final drive, the work of the floating seal is only to adjust the bearing clearance. When the equipment is maintained for two thousand hours, it should be adjusted accordingly. After the floating seal equipment is operated for a period of time, the bearing and the floating oil seal seal the iron box faces of the two metal seal rings. Firstly, the bearing has an adverse effect. The bearing clearance is too large, the working conditions and conditions are deteriorated, and the dynamic load is increased, which accelerates the fatigue damage of the bearing. The second is that for the floating seal, the bearing gap is reduced due to the increase of the bearing clearance and the wear of the seal itself, and the fit between them is not tight, so that the foreign matter enters the sealing surface. The possibility is increased, which further exacerbates the wear of the sealing surface. Such a vicious cycle eventually leads to seal failure. Therefore, correct adjustment of the clearance of the bearing is of great significance for protecting the bearing and preventing the floating seal from leaking.