John Deere 9120
The John Deere 9120 is a tractor produced by John Deere. It is equipped with a 496 ci 8.1 L engine. The listed engine power is Diesel (listed): 280 hp / 208.8 kW. Transmission: John Deere Powershift. Operating weight: 30970 to 35375 pounds.
Engine Power
Diesel (listed): 280 hp / 208.8 kW
Fuel & Capacities
270 gal
1022.0 L
Transmission
John Deere Powershift
Operating Weight
35,375 lbs (620/70R46 duals)
16046 kg
Overview
 | 2002 - 2007
9020 SeriesFour-wheel Drive (4WD) tractor
9020 Series
Four-wheel Drive (4WD) tractor |
|---|
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 | |
Engine details ...  |
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 |
Performance test details ...  | |
Mechanical | |
|---|---|
Four-wheel drive | |
Steering | hydrostatic articulated |
Hydraulic wet disc brakes | |
CommandView cab standard with air-conditioning. | |
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 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging system | alternator |
Charging amps | 140 |
Batteries | 2 |
Battery CCA | 925 |
Battery volts | 12 |
Engine
Engine Detail — 496 ci / 8.1 L Diesel
Manufacturer | John Deere |
Configuration | turbocharged diesel, 6-cylinder, liquid-cooled |
Displacement | 496 ci
8.1 L |
Bore/Stroke | 4.56x5.06 inches
116 x 129 mm |
Power | 280 hp
208.8 kW |
Air cleaner | dry |
Compression | 16.0:1 |
Rated RPM | 2100 |
Starter volts | 12 |
Coolant capacity | 55 qts
52.1 L |
Oil capacity | 28 qts
26.5 L |
Transmission
Transmission options | |
|---|---|
24-speed partial power shift | |
18-speed full power shift |
Transmission — John Deere PowerSync
Transmission | John Deere PowerSync |
Type | partial power shift |
Gears | 24 forward and 6 reverse |
Oil capacity | 136 qts
128.7 L |
140 qts (with PTO)
132.5 L | |
Four ranges (A-D) and three gears (1-3) with high-low power shift. Synchronized shifting between ranges A-B, B-C, and C-D. Gear shifts are synchronized between 1-R, 1-2, and 2-3. Reverse gear does not operate in D range. | |
With 20.8R42 tires. | |
 | |
Transmission — John Deere Powershift
Transmission | John Deere Powershift |
Type | full power shift |
Gears | 18 forward and 6 reverse |
With 20.8R42 tires. | |
 | |
Dimensions
John Deere 9120 Tires | |
|---|---|
Ag front | 20.8R42 |
Ag rear | 20.8R42 |
Dimensions | |
|---|---|
Wheelbase | 137.8 inches
350 cm |
Length | 274 inches
695 cm |
289 inches (with hitch)
734 cm | |
Width | 115.5 inches
293 cm |
Shipping weight | 30,970 lbs
14047 kg |
Operating weight | 35,375 lbs (620/70R46 duals)
16046 kg |
Clearance (front axle) | 26.8 inches
68 cm |
Clearance (drawbar) | 15 inches
38 cm |
John Deere 9120 Height | |
|---|---|
Hood | 97.5 inches
247 cm |
Cab | 137.5 inches
349 cm |
Exhaust | 140 inches
355 cm |
Tests
OCED Tractor Test 1810 | |
|---|---|
Diesel 18-speed 4WD
September 23 - 27, 2002
Link: OCED Tractor Test 1810 file | |
PTO performance | |
Power at rated engine speed | 244.57 hp
182.4 kW |
Fuel use | 14.6 gal/hour
55.3 l/hour |
Power at rated PTO speed | 262.97 hp
196.1 kW |
Fuel use | 14.4 gal/hour
54.5 l/hour |
Drawbar performance | |
Max power | 226.02 hp
168.5 kW |
Fuel use | 14.5 gal/hour
54.9 l/hour |
Gear 7 used for power test. | |
Max pull | 35,211 lbs
15971 kg |
Gear 1 used for pull test. | |
Recommended Implements & Sizing Guide
Engineering recommendations for John Deere 9120 based on its 280 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 8+ Bottom On-Land Hitch8+ 铧重型机外牵引犁 | Commercial / Field Scale | High horsepower articulated/4WD field plowing. |
Rotary Cutter / MowerMowing & Clearing | 15 to 20 ft Batwing4.6 - 6.1 m 宽幅折叠翼 | Commercial / Field Scale | Large commercial field and roadside mowing operations. |
Rotary TillerSeedbed Prep | 90 to 120 in Heavy Duty230 - 300 cm 重型旋耕机 | Commercial / Field Scale | Deep intensive seedbed preparation for commercial row crops. |
Disc HarrowSecondary Tillage | 24 to 36 ft Heavy Duty Field Disc7.3 - 11.0 m 超宽重型整地耙 | Commercial / Field Scale | Broad-acre grain tillage for high-drawbar tractors. |
Hay BalerHay & Forage | Large Square Baler (3x4 or 4x4)大方捆商用打捆机 (1.2x1.2 m) | Commercial / Field Scale | High-capacity commercial forage harvesting (1000 RPM PTO). |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for John Deere 9120.
Estimated Continuous Field Runtime: 18.5 hrs
Approximately 18.5 hours of continuous field operation at ~75% rated power on a full tank (270 gal / 1022.1 L).
Estimated 75% Load Fuel Burn~14.6 gal/hr (55.1 L/hr)
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
John Deere 9120 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for John Deere 9120.
Converted Equivalents:
Horsepower (HP)280 hp
Kilowatts (kW)208.8 kW
Metric Horsepower (PS / CV)283.9 PS
Direct Competitor Comparison
Compare John Deere 9120 against same-era industry alternatives in the same horsepower class.
Current Model
John Deere
John Deere 9120
Engine Power:Diesel (listed): 280 hp / 208.8 kW
★ Baseline Reference
Related models
John Deere 7225J
- Power:
- 225
- Production years:
- 2010 - 2020
John Deere 8130
- Power:
- 225
- Production years:
- 2006 - 2009
John Deere 8225R
- Power:
- 225
- Production years:
- 2009 - 2010
John Deere 8450
- Power:
- 225
- Production years:
- 1982 - 1988
John Deere WA-14
- Power:
- 225
- Production years:
- 1968 - 1970