Replacement
1. Raise the vehicle to clear the wheels.
2. Drain the oil from the gearbox.
3. Disconnect the cardan shaft from the gearbox, move it to the side and secure it.
4. Check the torque of the wheel turning resistance by turning the gearbox nut with a torque wrench with a scale of several Nm. This torque is equal to the preload in the bearings of the gearbox drive shaft, which should be created during assembly.
5. Fix the gearbox flange and unscrew the drive gear nut.
6. Mark the position of the nut and flange.
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7. Using a puller, remove the drive gear flange of the gearbox.
8. Use a hammer to dislodge the seal, then pry it up and remove it.
9. Lubricate the lips of the seal with grease and carefully press in the new seal.
10. Lubricate the splines of the shaft and flange and install the gearbox flange, aligning the marks.
11. Tighten the new nut while holding the shaft from turning.
12. Tighten to the minimum specified torque specified in subsection 7.4.
13. Turn the gearbox shaft a few revolutions.
14. Measure the torque at which the pinion gear begins to turn.
15. The required torque is equal to the preload measured before disassembly plus 0.5 Nm.
16. If the torque is less than required, slightly tighten the gearbox nut until the required torque is reached.
17. If the torque is greater than the limit, then it is necessary to disassemble the gearbox and replace the spacer sleeve of the bearings of the drive shaft of the gearbox (performed in a car service).
Caution! Do not loosen the nut to relieve the tension in the bearings.
18. Then assembly is carried out in reverse order.
19. Attach the cardan shaft, aligning it with the marks, and fill it with oil.