2. Check the contact surface of the shaft journal again for scratches and burrs that could damage the sealing lip of the oil seal.
3. Remove the old seal from the casing using hammer blows. Note the depth of the seal seat in the casing.
4. Clean the seating surface of the casing, lubricate it with engine oil. The seal should be pressed in over the entire surface at once, so using a hammer is not allowed. If you don't have a press at hand, you can mount the seal in a vice, placing smooth wooden boards between the jaws and the seal. The wood should be thick enough to distribute the force evenly.
Note: on models from 1988 onwards, the seal must be pressed in to a depth of 0.2-0.5 mm from the edge of the casing. No recess is allowed.
5. Lubricate the lip of the oil seal with engine oil. Install a new housing gasket and lubricate it with sealant.
6. Tighten the bolts in ¼ turn increments until the rear oil seal housing is fully and securely fastened.
(The original can be found on the resource: www.HondaBook.ru)