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John Deere 8120

John Deere 8120 tractor
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The John Deere 8120 is a row-crop tractor produced from 2002 to 2005 as part of the 8020 Series. It features a John Deere 8.1L 6-cylinder turbocharged diesel engine delivering up to 230 hp gross power. The tractor offers a 16-speed full power shift transmission with hydraulic wet disc clutch and is available in two- or four-wheel drive configurations. It includes a hydrostatic power steering system, hydraulic wet disc brakes, and a standard cab. The 8120 supports a variety of hydraulic and hitch capacities, including a rear lift capacity up to 15,180 lbs optional and front lift of 11,000 lbs. Fuel capacity ranges from 135 to 160 gallons. The tractor's dimensions and weight vary by configuration, with wheelbases from 115.7 to 123.6 inches and shipping weights from 19,100 to 22,450 lbs. Electrical system features a 12-volt negative ground with two batteries and 150 amp alternator. The 8120 is succeeded by the John Deere 8130 and related to models 8110 and 8220.
John Deere 8120tractorspecificationsenginetransmissionhydraulicsPTOdimensionsfarm tractor
Power208 hp
Founded2002 - 2005
Model8120

Technical Specifications

Detailed specifications and technical data for John Deere 8120

Power

Engine (max):230 hp (171.5 kW)
Engine (net):200 hp (149.1 kW)
PTO (tested):199.71 hp (148.9 kW)
PTO (claimed):170 hp (126.8 kW)
Engine (gross):208 hp (155.1 kW)
Drawbar (tested):148.45 hp (110.7 kW)

Engine

Type:turbocharged diesel
Model:John Deere 8.1L 6-cyl diesel
Idle RPM:900-2300
Cylinders:6-cylinder
Rated RPM:2200
Air cleaner:dry with secondary element
Bore/Stroke:4.56x5.06 inches (116 x 129 mm)
Fuel system:electronic high-pressure common rail (HPCR)
Displacement:496 ci (8.1 L)
Oil capacity:22.7 qts (21.5 L)
Configuration:liquid-cooled inline
Operating RPM:1500-2200
Starter volts:12
Coolant capacity:35.9 qts (34.0 L)
Compression ratio:16.5:1
Rated Power (net):200 hp (149.1 kW)
Maximum Power (net):220 hp (164.1 kW)
Oil change interval:250 h
Rated Power (gross):208 hp (155.1 kW)
Maximum Power (gross):230 hp (171.5 kW)

Weight

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

Capacity

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

Variants

8120:wheeled tractor
8120T:crawler

Electrical

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

Hydraulics

Type:closed center pressure-flow compensated (PFC)
Valves:5
Capacity:37 gal (140.0 L), 39.6 gal (ILS) (149.9 L)
Pressure:2900 psi (200.0 bar)
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

Mechanical

Cab:standard
Drive:Two- or four-wheel drive
Brakes:Hydraulic wet disc brakes
Steering:hydrostatic power

Production

Type:Row-Crop tractor
Series:8020 Series
Built in:Waterloo, Iowa, USA
Years produced:2002 - 2005

Transmission

Type:John Deere PowerShift
Gears:16 forward and 4 reverse
Clutch:hydraulic wet disc
Features: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.
Oil capacity:148 qts (140.1 L), 158.4 qts (ILS) (149.9 L)
Full power shift:yes

Tractor hitch

Rear Type:III, IIIN
Rear lift:12,300 lbs (5579 kg), 15,180 lbs (optional) (6885 kg)
Front lift:11000 lbs (4989 kg)
Front Hitch:IIIN (optional)

Serial Numbers

2002:1001
2003:10001
2004:20001
2005:30001

Dimensions & Tires

Length:209.9 inches (533 cm), 211.9 inches (long frame) (538 cm)
Weight:19100 to 22450 pounds
Front axle:2WD, MFWD, MFWD ILS
Height (cab):120.2 inches (305 cm)
2WD Wheelbase:123.6 inches (313 cm)
4WD Wheelbase:116.9 inches (296 cm)
ILS Wheelbase:115.7 inches (293 cm), 118.9 inches (long frame) (302 cm)
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)
Standard tires (ag):Front: 11.00-24. Rear: 480/80R46
Rack-and-pinion rear axle:3.937 by 110.5 inches (99 by 2806 mm), 3.937 by 118.5 inches (99 by 3009 mm), 4.331 by 118.5 inches (110 by 3009 mm), 4.724 by 118.5 inches (119 by 3009 mm)

Power Take-off (PTO)

Clutch:hydraulic wet discs
Rear PTO:independent
Engine RPM:540@1975, 1000@2200
Rear PTO Type:1000 (1.75), 540/1000 (1.375 optional)

Related Models

John Deere 8130

Model:8130

John Deere 8220

Model:8220

John Deere 8110

Model:8110