Drain the gearbox oil.
Remove the front wheels and mudguards.
Separate the drive and connecting shafts from the gearbox in the final drive unit.
Pic. 3.27. Removing the differential seal
Remove seals using a screwdriver (pic. 3.27).
Pic. 3.28. Installing the differential seal
Using the special tool and a hammer, evenly press in the new oil seal until the special tool rests against the final drive housing (pic. 3.28).
Coat the lip of each oil seal with gearbox oil.
Insert the drive and connecting shafts in the gearbox in the final drive unit.
Install wheels and mudguards.
Add the required amount of oil of the required type.