I think you're looking for the parts manual. Try www.tractorsmart.com --- click on the "Manuals" tab and follow the prompts. You'll get a download of the manual at no charge. Should give you what you need.
You can also send me a private message with your e-mail and I will get the parts manual for you. I have the manual in my library and I have uploaded it to my Apple MobileMe account on the web.