Try this place:
Instruction Manuals - Delivered with the product when new, shows operation, lubrication and light maintenance. Some manuals have electrical wiring diagrams too!. Very detailed for your specific tractor.
Parts Catalogs - Used by IH dealers and factory branches to identify repair parts, usually contains exploded views of components followed by manufacturers parts numbers for corresponding items. Very useful illustrations showing the "breakdown" of components to help you get the right part!.
Service Manuals - Used by IH dealers and factory branches to do extensive service to machines. Many diagrams, exploded views, loaded with technical service information. A must have!
Sales Brochures - Advertisement used to sell the product, normally 8 to 40 pages, full of many action photos, features, and specifications. Many contain "in-the-field" action photos showing optional equipment and attachments.