Hi what you need to do can be difficult but not impossible,
here how ,put your new belt on the brushes,then making shaw the side plates on the brushes are in line with there grooves on the end of the sole plate put one end in first,making shaw it is correctly positioned then hold that section while you pull the other end into place,the brushes should stay there if you have the end pieces correctly inline.
Hope this helps good luck.
HENRY
March 2008