John Deere 8120

John Deere 8120The John Deere 8120 is a 2WD or 4WD row-crop tractor from the 8020 series. This tractor was manufactured by John Deere in Waterloo, Iowa, USA from 2002 to 2005. The John Deere 8120 is equipped with a 8.1 L (496.0 cu·in) six-cylinder diesel engine and a full power shift transmission with 16 forward and 4 reverse gears.

The John Deere 8120 row-crop tractor used the John Deere engine. It is a 8.1 L, 8,128 cm2, (496.0 cu·in) six-cylinder turbocharged diesel engine with 116.0 mm (4.57 in) of the cylinder bore and 129.0 mm (5.08 in) of the piston stroke. The compression ratio rating is 16.5:1. This engine produced 233.2 PS (171.5 kW; 230.0 HP) at 2,200 rpm of output power.

The JD 8120 is equipped with hydrostatic power steering, hydraulic wet disc brakes, Cab (standard), and 511.0 liters (135 US gal.; 112.4 Imp. gal) fuel tank.

John Deere 8120 Specifications

General Specifications
Model John Deere 8120
Length 5,330 mm (209.8 in)
Long frame: 5,380 mm (211.8 in)
Wheel base 2WD: 3,130 mm (123.2 in)
4WD: 2,960 mm (116.5 in)
ILS: 2,930 mm (115.7 in)
Long frame: 3,020 mm (118.9 in)
Weight (shipping) 2WD: 8,665 kg (19,105 lbs)
4WD: 9,550 kg (21,055 lbs)
ILS: 10,185 kg (22,450 lbs)
Long frame: 9,820 kg (21,650 lbs)
Fuel tank capacity 511.0 liters (135 US gal.; 112.4 Imp. gal)
Optional: 605.6 liters (160 US gal, 133.2 Imp. gal)
Battery Two 12V, CCA 925A
Cabin type Cab (standard)
Engine model John Deere
Engine type Four-stroke, liquid-cooled, inline
Cylinders 6
Fuel type Diesel
Displacement 8.1 L, 8,128 cm2, (496.0 cu·in)
Bore and stroke 116.0 mm X 129.0 mm (4.57 in X 5.08 in)
Compression ratio 16.5:1
Horsepower 233.2 PS (171.5 kW; 230.0 HP) at 2,200 rpm
Starter Electric
Oil type SAE 5W-30, 0W-40
Oil capacity: 21.5 L (22.7 US. qt, 18.9 Imp. qt.)
Coolant capacity: 34.0 L (35.9 US. qt, 29.9 Imp. qt.)
Transmission and chassis
Chassis 4×2 2WD or 4×4 MFWD 4WD
Steering type Hydrostatic power
Brakes Hydraulic wet disc
Front hubs 3.4 L (3.6 US.qts, 3.0 Imp. qts)
ILS: 4.0 L (4.2 US.qts, 3.5 Imp. qts)
Front diff 13.4 L (14.2 US.qts, 11.8 Imp. qts)
Transmission model John Deere PowerShift
Transmission type Full power shift with hydraulic wet disc clutch
Gears 16 forward and 4 reverse
Speed Forward: 39.9 kmh (24.8 mph) Reverse: 10.9 kmh (6.8 mph)
Transmission oil capacity 140.1 L (37 US. gal, 30.8 Imp. gal.)
Front tires Ag: 11.00-24
Rear tires Ag: 480/80R46
Three-Point Hitch
Category III/IIIN
Control type
Lift capacity 5,580 kg (12,300 lbs)
6,885 kg (15,180 lbs)
Front hitch
Category IIIN
Lift capacity 4,990 kg (11,000 lbs)
PTO (Power take-off shaft)
Rear PTO type Independent with hydraulic wet disc clutch
Rear PTO speed 1000 (1.75) or 540/1000 (1.375 optional)
Hydraulic system
Hydraulic type Closed center pressure-flow compensated (PFC)
Hydraulic capacity 140.0 L (37 US. gal, 30.8 Imp. gal.)
ILS: 150.0 L (39.6 US. gal, 33.0 Imp. gal.)
Pressure 2900 psi (199.9 bar)
Valves 5
SCV flow 30.0 gpm (113.6 lpm)
Total flow 33.5 gpm (126.8 lpm)
42.5 gpm (160.9 lpm)
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We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. In addition, the characteristics may vary depending on the modification and market. We do not provide advice on technical issues related to the any operation or repair. We do not recommend using provided information for repairing or spare parts ordering, use only official service manuals and spare-parts catalogs.

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