The bearing is in the same place as most Okuma reels.
Undo the two small phillips-head screws that hold the plastic cap on the handle side of the spool.
Remove plastic cap and the spool release lever (try not to lose any small parts).
You should now be able to see the end of the bearing - it drops out easily and replace it 'tother way round.
I'll see if I can find the official drawing.
Edited to add:
There was a really good drawing at
http://www.okumafishing.com/support/...ldirection.gif
But the site has been revised and the image has gone!!!!
So I scanned it.