Model: 4044M, 4049R, 4066M, 4044R, 4066R, 4052M, 4052R, 4049M Tractor. Which Manual do I need for my John Deere 4044M, 4049R, 4066M, 4044R, 4066R, 4052M, 4052R, 4049M Tractor?. Technical/Service Manual – Detailed guide for diagnosing, testing, and repairing the John Deere 4044M, 4049R, 4066M, 4044R, 4066R, 4052M, 4052R, 4049M Tractor, providing essential service information.