THIS ISSUE HAS COME UP BEFORE AND IN EVERY CASE, THE PRO TECH RESPONDING BASICALLY SAID THIS WAS ONE TASK THAT WAS TOUGH FOR DIYERS TO HANDLE. YOU NEED SPECIAL TOOL(S).
THE FOLLOWING THREAD POINTS TO A WEB TOOL SELLER THAT CARRIES WHAT YOU'LL NEED.
http://www.peachparts.com/shopforum/showthread.php?t=123581&highlight=rear+bearing+WHEEL