Part Number: OMAR232106. Manual Type: Owners Operators Manual. Make: John Deere. Which Manual do I need for my John Deere 7630, 7730, 7930, 7830 Tractors?. Technical/Service Manual – Detailed guide for diagnosing, testing, and repairing the John Deere 7630, 7730, 7930, 7830 Tractors, providing essential service information.