Ducati SUPERBIKE 848 MY 2008 Manual page 223

Front wheel
To remove the bearings (5) and seals (4) from the wheel hub, follow the instructions below.
Position a drift (A) against the inner race of the bearing (5).
Tap the drift with a hammer to drive out the bearing (5) and the oil seal (4).
Apply the drift at different points to keep the bearing square during removal.
Important
Once removed, the used bearings and seals must not be refitted.
Before fitting new bearings, check that the housing is clean and free from scoring and damage.
Grease the bearing seat and then push the new bearing into its seat.
Using a tubular drift (B) that only bears on the outer race of the bearing, drive the bearing (5) fully into its seat.
Use the same method to install the seals (4).
Ensure that spacer (7) is fitted between the two wheel bearings.
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