RE: K&B 7.5 OB main bearing seized
Ok, working the PTO.. Open up a vise to allow the PTO shaft flat edge to freely spin. The PTO should sit on the vise edges. Then take a punch and hammer out the PTO shaft. Then you can take the PTO and put it back in the oven to remove the bearing(s). Most likely one will be left in the PTO while the other stays on the PTO shaft...