I have the 2008 model of this and the bearings mus have seized or something because a lot of the plastic has melted. This part for the 2009 model looks alot like my part except mine has the bearings exposed (not sealed).
For my lawnmower model 12AI876Q011 I go to part number A39 but that does not seem to be available in the parts list below the diagram. But a similar part (Troy-Bilt Lower Pulley Assembly - 956-04046) looks like it might be an updated version of the previous (2008) version but should work. I am not sure and am afraid to order it if there is a difference. Can anyone address this? Thanks in advance.