I have a TR99. The lower rotor drive sheave appears to be set in about 1/2". The dealer put a spacer behind the sheave but the other pulleys that are behind the sheave are now out of align. I am guessing that when New Holand built the combine everything was aligned .Is there a possibility that there is something wrong with the upper sheave that is making it look like the lower sheave is set in? The combine has 250 hrs on it,the sheaves were out of align from the factory. 2 belts have failed.