dont think its an easy job i believe you have to disconect the steering arms then feed it round a series of pulleys ,if you go to the jd website use this address it may help as it shows you the parts in exploded format just type the model in it is...
http://jdpc.deere.com/jdpc/servlet/com.deere.u90490.partscatalog.view.servlets.HomePageServlet_Alt
p bainbridge
October 2006