| Production | |
| Manufacturer | John Deere |
| Four-wheel Drive (4WD) tractor | |
| Built in Waterloo, Iowa, USA | |
| John Deere 9120 Engine | |
| John Deere 8.1L 6-cyl diesel | |
| John Deere 9120 Transmissions | |
| 24-speed partial power shift | |
| 18-speed full power shift | |
| John Deere 9120 Power | |
| Engine | 280 hp 208.8 kW |
| PTO (claimed) | 230 hp 171.5 kW |
| Drawbar (tested) | 226.02 hp 168.5 kW |
| PTO (tested) | 244.57 hp 182.4 kW |
| Mechanical | |
| Four-wheel drive | |
| Steering | hydrostatic articulated |
| Hydraulic wet disc brakes | |
| CommandView cab standard with air-conditioning. | |
| Photos | |
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| Capacity | |
| Fuel | 270 gal 1022.0 L |
| Hydraulic system | 27 gal 102.2 L |
|   | 28 gal (with 3pt) 106.0 L |
| Hydraulics | |
| Type | closed center pressure/flow compensated |
| Capacity | 27 gal 102.2 L |
|   | 28 gal (with 3pt) 106.0 L |
| Pressure | 2900 psi 200.0 bar |
| Valves | 4 or 5 |
| Pump flow | 30 gpm 113.6 lpm |
| Total flow | 44 gpm 166.5 lpm |
|   | 48 gpm (Powershift) 181.7 lpm |
| Tractor hitch | |
| Rear Type | III |
|   | IV/IVN |
| Rear lift | 13,871 lbs 6291 kg |
|   | 14,445 lbs (optional) 6552 kg |
| Power Take-off (PTO) | |
| Rear PTO | independent |
| Rear PTO Type | 1000 |
| Dimensions & Tires | |
| Wheelbase | 137.8 inches 350 cm |
| Weight | 30970 to 35375 pounds |
| Front tire | 20.8R42 |
| Rear tire | 20.8R42 |
| 9120 Serial Numbers | |
| Location: | On the top-left of rear hinge member |
| 2002 | 1001 |
| 2003 | 10001 |
| 2004 | 20001 |
| 2005 | 30001 |
| 2006 | 40001 |
| 2007 | 50001 |
FAQ: How to read a serial number table. | |
| Electrical | |
| Ground | negative |
| Charging system | alternator |
| Charging amps | 140 |
| Batteries | 2 |
| Battery CCA | 925 |
| Battery volts | 12 |
| Page information | |
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| TractorData is a family-owned small business located in Minnesota that has been providing reference information on tractors since 1999. | |
| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on May 15, 2022 | |
| http://techpubs.deere.com/ - Official operator manuals for purchase or download from Deere. |