Can you tell me where repair and operating manuals for special equipment are sold?

You can find the necessary instructions for special equipment at eRepairInfo https://erepair-info.com/product-category/john-deere/lawn-tractors/ For special equipment from John Deere and other manufacturers, step-by-step photos and video instructions are sold here. All PDF files are safe and presented in excellent quality, pictures, diagrams come without watermarks or links. Through a simple and convenient search, it is very easy to find the manual you need.