Follow up, the parts manual appears to be listed here as 53177_160.pdf pages 11 and 12.
Also on another post regarding an xc by member Yappie beginning 08/08/12 I believe I observed a tension spring connected between the chassis bolt tab and the deck brake assembly, picture number 4, 5 and 6 of the xc .
Could this be a home made alteration, it appears that the spring is a standard deck height adjuster spring.
Possibly this alters the pivot mechanics, thinking the measure twice cut once philosophy.
