Olson 30 Rudder Bearings are friction fitted into the rudder tube that is glassed into the boat. There are two bearings, an upper and a lower. As these are friction fitted, care should be exercised when trailering the boat with the rudder removed from the boat, I lost the lower one several years ago! To remove the bearing, you will need a tool that can be inserted in the small horizontal gap between the rudder tube and the bearing and then moved around the circumference of the gap as you light tap it out. Bruce Rand, from O’Naturel put me onto the Old Forge 7019 – Puller Seal L-Type which retails for about $13.00, it does the job quite nicely!
Dave Wilby, O’ffliction
New Rudder Bearings
Ballenger Spars (USA) (scroll or search page content, not a direct link)