Ducati Monster 796 Workshop Manual page 294

Front wheel
Overhauling the front wheel bearings
Before checking the dimensions, check the wear on wheel bearings. Check for wear by hand after cleaning and degreasing
the bearings in their seats. Turn the inner race. Check the amount of radial and axial play. Excessive play will cause
vibration and make the bike unstable; in this case the bearings must be renewed. To remove the bearings (5) from the
wheel hub, proceed as follows.
Position a drift (C) against the inner race of the bearing (5).
Tap the drift with a hammer to drive out the bearing. Apply the drift at different points to keep the bearing square during
removal.
Important
Once removed, bearings 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.
Warning
Avoid getting grease on the braking surface of the disc during these operations as this could impair braking efficiency.
Using a tubular drift (D) which bears only on the outer ring of the bearing, drive the bearing fully into its seat. Ensure that
spacer (6) is fitted between the two wheel bearings.
Note
Wheels must be rebalanced after repair, maintenance and overhaul operations.
Overhauling the front wheel shaft