I have a side pull system on my 17 foot willie and had sealed bearings put into the pully wheels. The system comes from Willie. Just grind the pins and pop em out. Drill the holes out a little bigger and get some sealed bearings (9/16 od and 3/8 id)press em in and get some 3/8 4140 stock to make new pins and away you go. The bearings were about 50 bucks, the labor ?