John Deere 8120 tractor specifications

2002 - 2005

2002 - 2005 8020 SeriesRow-Crop tractor

Production

Production Manufacturer:John Deere
Type:Row-Crop tractor
Factory:Waterloo, Iowa, USA

Variants

Variants 8120:wheeled tractor
8120T:crawler

2002 - 2005

8020 Series

Row-Crop tractor

Production

Production
Manufacturer:	John Deere
Type:	Row-Crop tractor
Factory:	Waterloo, Iowa, USA

Variants

Variants
8120:	wheeled tractor
8120T:	crawler

John Deere 8120 Power

John Deere 8120 Power
Engine (gross):	208 hp 155.1 kW
Engine (net):	200 hp 149.1 kW
Engine (max):	230 hp 171.5 kW
PTO (claimed):	170 hp 126.8 kW
Drawbar (tested):	148.45 hp 110.7 kW
PTO (tested):	199.71 hp 148.9 kW
power test details ...

John Deere 8120 Engine

John Deere 8120 Engine
John Deere 8.1L 6-cyl diesel
Engine details ...

Mechanical

Mechanical
Chassis:	4x2 2WD
	4x4 MFWD 4WD
Steering:	hydrostatic power
Brakes:	hydraulic wet disc
Cab:	Cab standard.
Transmission:	16-speed full power shift
Transmission details ...

Capacity

Capacity
Fuel:	135 gal 511.0 L
	160 gal 605.6 L (optional)
Hydraulic system:	37 gal 140.0 L
	39.6 gal 149.9 L (ILS)
Front hubs:	3.6 qts 3.4 L
	4.2 qts 4.0 L (ILS)
Front diff.:	14.2 qts 13.4 L

Hydraulics

Hydraulics
Type:	closed center pressure-flow compensated (PFC)
Capacity:	37 gal 140.0 L
	39.6 gal 149.9 L (ILS)
Pressure:	2900 psi 200.0 bar
Valves:	5
SCV flow:	30 gpm 113.6 lpm
Total flow:	33.5 gpm 126.8 lpm *With standard 45cc pump
	42.5 gpm 160.9 lpm *Optional 57cc pump

Tractor hitch

Tractor hitch
Rear Type:	III,IIIN
Rear lift:	12,300 lbs 5579 kg
	15,180 lbs 6885 kg *Optional
Front Hitch:	IIIN*Optional
Front lift:	11000 lbs 4989 kg

Power Take-off (PTO)

Power Take-off (PTO)
Rear PTO:	independent
Clutch:	hydraulic wet discs
Rear RPM:	1000 (1.75)
	540/1000 (1.375 optional)
Engine RPM:	540@1975 1000@2200

Dimensions & Tires

Dimensions & Tires
2WD Wheelbase:	123.6 inches 313 cm
4WD Wheelbase:	116.9 inches 296 cm
ILS Wheelbase:	115.7 inches 293 cm
	118.9 inches 302 cm (long frame)
Weight:	19100 to 22450 pounds
Front tire:	11.00-24
Rear tire:	480/80R46
Full dimensions and tires ...

8120 Serial Numbers

8120 Serial Numbers
Location:	Rear of tractor.
photo of 8120 serial number
2002:	1001
2003:	10001
2004:	20001
2005:	30001
how to read serial numbers...

Electrical

Electrical
Ground:	negative
Charging system:	alternator
Charging amps:	150
Batteries:	2
Battery CCA:	925
Battery volts:	12

John Deere 8120 Power

John Deere 8120 Power Engine (gross):208 hp
155.1 kW
Engine (net):200 hp
149.1 kW
Engine (max):230 hp
171.5 kW
PTO (claimed):170 hp
126.8 kW
Drawbar (tested):148.45 hp
110.7 kW
PTO (tested):199.71 hp
148.9 kW
power test details ...

2002 - 2005

8020 Series

Row-Crop tractor

OCED Tractor Test 1819

OCED Tractor Test 1819
Diesel 16-speed 4WD March 28 - April 8, 2003 Link: OCED Tractor Test 1819 file
PTO performance
Max power:	199.71 hp 148.9 kW
Fuel use:	10.5 gal/hour 39.7 l/hour
Power at rated engine speed:	172.13 hp 128.4 kW
Fuel use:	10.1 gal/hour 38.2 l/hour
Drawbar performance
Max power:	148.45 hp 110.7 kW
Fuel use:	10.2 gal/hour 38.6 l/hour
Gear 8 used for power test.
Max pull:	22,308 lbs 10118 kg
Gear 3 used for pull test.

John Deere 8120 Engine

John Deere 8120 Engine John Deere 8.1L 6-cyl diesel Engine details ...

2002 - 2005

8020 Series

Row-Crop tractor

Engine Detail

Engine Detail
John Deere
turbocharged diesel
6-cylinder
liquid-cooled inline
Displacement:	496 ci 8.1 L
Bore/Stroke:	4.56x5.06 inches 116 x 129 mm
Rated Power (ECE R24):	200 hp 149.1 kW
Rated Power (EC 97/98):	208 hp 155.1 kW
Maximum Power (ECE R24):	220 hp 164.1 kW
Maximum Power (EC 97/68):	230 hp 171.5 kW
Fuel system:	electronic high-pressure common rail (HPCR)
Air cleaner:	dry with secondary element
Compression:	16.5:1
Rated RPM:	2200
Idle RPM:	900-2300
Operating RPM:	1500-2200
Starter volts:	12
Coolant capacity:	35.9 qts 34.0 L

Engine Oil

Engine Oil

Oil capacity:	22.7 qts 21.5 L
Oil change:	250 h

Mechanical

Mechanical Chassis:4x2 2WD
4x4 MFWD 4WD
Steering:hydrostatic power
Brakes:hydraulic wet disc
Cab:Cab standard.
Transmission:16-speed full power shift
Transmission details ...

2002 - 2005

8020 Series

Row-Crop tractor

Transmission

Transmission
Transmission:	John Deere PowerShift
Type:	full power shift
Gears:	16 forward and 4 reverse
Clutch:	hydraulic wet disc
Oil capacity:	148 qts 140.1 L
	158.4 qts 149.9 L (ILS)
Full power shift transmission with single shift lever with display on cab corner post. Tractor begins in 7 (forward) and 2 (reverse) on start up. Clutch pedal may be used to pre-select a gear by holding clutch and pressing lever until desired gear is reached. Automatic PowerShift (APS) allows automated shifting to match load.

Speeds

Speeds
With 18.4R46 rear tires.

Capacity

Capacity Fuel:135 gal
511.0 L
160 gal
605.6 L (optional)
Hydraulic system:37 gal
140.0 L
39.6 gal
149.9 L (ILS)
Front hubs:3.6 qts
3.4 L
4.2 qts
4.0 L (ILS)
Front diff.:14.2 qts
13.4 L

Hydraulics

Hydraulics Type:closed center pressure-flow compensated (PFC)
Capacity:37 gal
140.0 L
39.6 gal
149.9 L (ILS)
Pressure:2900 psi
200.0 bar
Valves:5
SCV flow:30 gpm
113.6 lpm
Total flow:33.5 gpm
126.8 lpm *With standard 45cc pump
42.5 gpm
160.9 lpm *Optional 57cc pump

Tractor hitch

Tractor hitch Rear Type:III,IIIN
Rear lift:12,300 lbs
5579 kg
15,180 lbs
6885 kg *Optional
Front Hitch:IIIN*Optional
Front lift:11000 lbs
4989 kg

Power Take-off (PTO)

Power Take-off (PTO) Rear PTO:independent
Clutch:hydraulic wet discs
Rear RPM:1000 (1.75)
540/1000 (1.375 optional)
Engine RPM:540@1975
1000@2200

Dimensions & Tires

Dimensions & Tires 2WD Wheelbase:123.6 inches
313 cm
4WD Wheelbase:116.9 inches
296 cm
ILS Wheelbase:115.7 inches
293 cm
118.9 inches
302 cm (long frame)
Weight:19100 to 22450 pounds
Front tire:11.00-24
Rear tire:480/80R46
Full dimensions and tires ...

2002 - 2005

8020 Series

Row-Crop tractor

John Deere 8120 Tires

John Deere 8120 Tires
Standard tires (ag):	Front: 11.00-24. Rear: 480/80R46

Dimensions

Dimensions
2WD Wheelbase:	123.6 inches 313 cm
4WD Wheelbase:	116.9 inches 296 cm
ILS Wheelbase:	115.7 inches 293 cm
	118.9 inches 302 cm (long frame)
Length:	209.9 inches 533 cm
	211.9 inches 538 cm (long frame)
Height (cab):	120.2 inches 305 cm
Front axle:	2WD
Front axle:	MFWD
Front axle:	MFWD ILS
Rear axle:	Rack-and-pinion: 3.937 by 110.5 inches 99 by 2806 mm
Rear axle:	Rack-and-pinion: 3.937 by 118.5 inches 99 by 3009 mm
Rear axle:	Rack-and-pinion: 4.331 by 118.5 inches 110 by 3009 mm
Rear axle:	Rack-and-pinion: 4.724 by 118.5 inches 119 by 3009 mm
2WD Front tread:	60 to 88 inches 152 to 223 cm
4WD Front tread:	60 to 80 inches 152 to 203 cm
ILS Front tread:	60 to 88 inches 152 to 223 cm

John Deere 8120 Weight

John Deere 8120 Weight
Shipping:	19,100 lbs 8663 kg (2WD)
	21,050 lbs 9548 kg (4WD)
	21,650 lbs 9820 kg (long frame)
	22,450 lbs 10183 kg (ILS)
Operating:	20,060 lbs 9099 kg (4WD 480/80R46 duals)
Max Drawbar:	3,900 lbs 1769 kg (Cat 3 extended)
	6,070 lbs 2753 kg (Cat 3 short)
	10,000 lbs 4536 kg (Cat 4)