50 - AMS 55 Tractor - 7720, 7820, 7920 - AutoTrac™ Electro Hydraulic Steering Control Unit (EH Valve) - 7720, 7820, 7920 Series Tractors Parts on group Electro Hydraulic Steering Control Unit (EH Valve) - 7720, 7820, 7920 Series Tractors: Pos. Part No Qty Parts name Comments 1. RE290044 [1] Control Valve (SUB FOR RE216702) 2. RE290610 [1] Elec-Hyd Proportional Valve Parts catalog 55 Tractor - 7720, 7820, 7920 - AutoTrac™: Sensor Brackets 55 Tractor - 7720, 7820, 7920 - AutoTrac™ part catalog John Deere Steering Flowmeter Assembly 55 Tractor - 7720, 7820, 7920 - AutoTrac™ part catalog John Deere Attachment, AutoTrac™ Tractor Vehicle, 7720 or 7820 Models W/ MFWD and IVT™ 55 Tractor - 7720, 7820, 7920 - AutoTrac™ part catalog John Deere Attachment, AutoTrac™ Tractor Vehicle, 7720 or 7820 Models W/ MFWD and PowrQuad™ Transmission 55 Tractor - 7720, 7820, 7920 - AutoTrac™ part catalog John Deere Steering Valve Bracket 55 Tractor - 7720, 7820, 7920 - AutoTrac™ part catalog John Deere Steering Pivot Assembly 55 Tractor - 7720, 7820, 7920 - AutoTrac™ part catalog John Deere Steering Valve Lines 55 Tractor - 7720, 7820, 7920 - AutoTrac™ part catalog John Deere Wiring Harness - North America 55 Tractor - 7720, 7820, 7920 - AutoTrac™ part catalog John Deere Wiring Harness - Region II 55 Tractor - 7720, 7820, 7920 - AutoTrac™ part catalog John Deere Flex Box 55 Tractor - 7720, 7820, 7920 - AutoTrac™ part catalog John Deere Wiring Harness 55 Tractor - 7720, 7820, 7920 - AutoTrac™ part catalog John Deere Steering System Field Install Kit 55 Tractor - 7720, 7820, 7920 - AutoTrac™ part catalog John Deere