John Deere 8120

John Deere 8120 Row-Crop tractor Technical Specifications

John Deere 8120 is a Row-Crop tractor that was produced by the John Deere between 2002 – 2005.

Below you will find detailed technical specifications for John Deere 8120 covering engine types, horsepower ratings, weight, height, fuel type and tank volume, oil capacity and type, hydraulic system diagram, wiring diagram, battery specs, etc.

John Deere 8120 Production











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


John Deere 8120 Power



















Engine:
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

John Deere 8120 Electrical



















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

John Deere 8120 Mechanical

























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

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

























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

Tracktor 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)
















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

Title serial numbers




















Location: Rear of tractor.

photo of 8120 serial number

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


how to read serial numbers…

What year is my John Deere 8120? Serial Number Decoder

The serial number list shows the first tractor built in each year. The other tractors for that year will have successively higher numbers. Your serial number should be between two of the stated numbers.

The list only includes the numbers of the first tractors produced in each year. Your serial should be somewhere between two numbers.Unless you happen to be the first person to own a tractor, your number will not appear on the list.

John Deere 8120 Engine detail














































Engine Detail
John Deere
turbocharged diesel
6-cylinder
liquid-cooled inline
Displacement: 496 ci
8.1 L
Bore/Stroke: 4.56×5.06 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
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



John Deere 8120 Transmission overview

Engine Oil












Transmission: John Deere PowerShift
Type: full power shift
Gears: 16 forward and 4 reverse
Oil capacity: 260 qts
246.1 L

John Deere 8120 Dimensions


































Wheelbase: 89 inches
226 cm
  120 inches
304 cm (wide track option)
Length: 207 inches
525 cm
  219.6 inches
557 cm (with front weights)
Width: 103.7 inches
263 cm (min)
  150 inches
381 cm (max)
Height (cab): 122.9 inches
312 cm
Shiping weight: 25,950 lbs
11770 kg
Max weight: 31,500 lbs
14288 kg
Clearance (rear axle): 21.7 inches
55 cm
Clearance (drawbar): 17.7 inches
44 cm

John Deere 8120 Tests

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.

FAQ

Is John Deere 8120 a good tractor?

The John Deere 8120 is one of the great tractors in the John Deere stable, and it has earned John Deere a fantastic reputation.

How much oil does a John Deere 8120 take?

Check out the John Deere 8120 oil capacity and oil type in the engine specs section as it may vary across the engines. Keep in mind, that older models might have their oil capacity increased over time. You may compare between the early and late oil capacity.

Do tractors have VIN numbers?

Every tractor has a VIN number. The number is usually engraved below the driver’s seat. Tractor manufacturers put the number in different places on the tractor body.

What was the last year John Deere made the 8120?

The John Deere 8120 was an agricultural tractor model made from 2002 – 2005

Where is the serial number on a John Deere 8120?

Lookup rear of tractor.

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