Your tractor was made in 1995 by MTD
You can see the parts diagrams at MTD's web site. Copy and paste this entire link into your address bar:
http://mtd.arinet.com/scripts/EmpartISAPI.dll?MF&app=MTDC&lang=EN&TF=Mainframe&loginID=MTDCon%20&LoginPWD=
On that page under "Search Brand" select "Yard Machines" Then enter you model number in the box. That will get you to all the Illistrated Parts Lists for your mower.
You'll probably find that your new belt is either too short, or mis-routed.
Rick
October 2006