Got a Yardman with 46" deck we use for cleanup and close-in trimming that's not mowing as well as it should. The blades are OK, and installed right. We previously found a deck drive (double vertical pulley) with frozen bearing. Replaced bearing. There is still a question as to whether the bearing was premature failure, and, if so, what was cause? Put new bearing in mower and reassembled deck. Belt and spindles appear to be running normally. Not sure about deck belt length being right. If it was slightly longer than the factory spec belt, could it be slipping, but not so I could see it by eyeballing? I note the pulley with new bearing is running very hot. This implies to me that the belt is slipping, even though it doesn't look like it is. Does this sound plausible?