Looking for the manual.
I need to replace traction belt

I can't seem to find that model number, however if you go here (http://www.mtdproducts.com/equipment/OperatorManualView?storeId=40500&catalogId=50500&langId=-1) to search for your manual by model number.

You can also try 1-800-668-1238 to contact the company.

Hi,
I too find nothing with a 597 vendor number, however I did find a number of parts breakdowns from 1985 (135) with the 698 frame designation at Outdoor Distributors at:
Outdoor Distributors - Lawn Mower Parts (http://search.cartserver.com/search/odstorecgi.cgi?cartid=a-8671&category=MTDPDF&maxhits=10&keywords=135-698&go=Search%21)
Peace,
Clarke