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