john deere 4640

John Deere 4640 tractor photo
1978 - 1982 Iron Horses SeriesRow-Crop tractor
1978 - 1982
Iron Horses Series
Row-Crop tractor
1978 - 1982
Iron Horses Series
Row-Crop tractor
1978 - 1982
Iron Horses Series
Row-Crop tractor
Transmission options
16-speed partial power shift
8-speed full power shift
Transmission
Transmission
John Deere Quad-Range
Type
partial power shift
Gears
16 forward and 6 reverse
Four gears (1-4) in four ranges (A-D). Power shift between pairs 1-2 and 3-4 in each range, with synchronized shift between 2-3. Two reverses in ranges A-C. Tractor must be stopped, and clutch used, to shift ranges. Power shift is provided hy a hydraulically-controlled planetary that provides an under-drive to each gear.
Speeds
4640 Quad-Range partial power shift speeds
Shift Pattern
John Deere 4640 transmission controls
Transmission
Transmission
John Deere PowerShift
Type
full power shift
Gears
8 forward and 4 reverse
Clutchless shift-on-the-move power shift between all eight forward and four reverse gears. Inching pedal provided for hooking up implements and other precision work.
Speeds
4640 PowerShift full power shift speeds
Shift Pattern
John Deere 4640 transmission controls

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