2. Disconnect the cardan shaft from the gearbox and move it to the side.
3. Check the torque of the wheel by turning the gearbox nut with a torque wrench with a scale of several Nm.
4. Mark the position of the nut, pinion gear and flange.
5. Count the number of threads to the nut.
6. Fix the gearbox flange and unscrew the drive gear nut.
7. Remove the gearbox flange.
8. Pry up and remove the seal.
9. Lubricate the seal and the groove in the gearbox housing with consistent grease. Carefully, without allowing the drive gear of the gearbox to shift, press in the new seal until it stops.
10. Install the gearbox flange by aligning the marks. Installing the flange by impact is not allowed.
11. Carefully seal the joint between the flange and the splines with sealant.
12. Place the washer on and tighten the nut to the number of threads counted before disassembly.
13. Measure the torque at which the pinion gear starts to turn. This torque is equal to the preload in the pinion gear bearings and should correspond to the norm. If the torque is less than required, tighten the gearbox nut until the required torque is reached (may be slightly higher than the norm, but not more than 0.5 N·m).
14. Then assembly is carried out in reverse order.