New balancer won’t press on

Not 100% sure what the exact interference point. Since the end of the balancer went through the front cover opening into the seal I’m guessing it was hitting the edge of the seal (?). Seems hard to believe but there was nothing else there and whatever was there was solid. The end of the balancer is rounded on the end so I wouldn’t think it would hang up. Still scratching my head on this one. New balancer will be here this afternoon. Probably be a couple of weeks before I get to put everything back together.