John Deere 4120

John Deere 4120 Compact Utility tractor Technical Specifications

John Deere 4120 is a Row-Crop tractor that was produced by the John Deere between 2004 – 2014.

Below you will find detailed technical specifications for John Deere 4120 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 4120 Production

Manufacturer: John Deere
Type: Compact Utility tractor
Factory: Augusta, Georgia, USA

John Deere 4120 Electrical

Ground: negative
Charging system: alternator
Charging amps: 75
Battery CCA: 770
Battery volts: 12

John Deere 4120 Mechanical

Chassis: 4×4 MFWD 4WD
Steering: hydrostatic power
Cab: ROPS.
Transmissions: 12-speed


Fuel: 14.5 gal
54.9 L
Hydraulic system: 10.3 gal
39.0 L
  9.6 gal
36.3 L (eHydro)


Type: open center
Capacity: 10.3 gal
39.0 L
  9.6 gal
36.3 L (eHydro)
Pressure: 2500 psi
172.4 bar
Pump flow: 12 gpm
45.4 lpm
Total flow: 17.1 gpm
64.7 lpm
Steering flow: 5.1 gpm
19.3 lpm

Tracktor Hitch

Rear Type: I
Rear lift (at ends): 3,130 lbs
1419 kg
Rear lift (at 24″/610mm): 2,500 lbs
1134 kg

Power Take-off (PTO)

Rear PTO: independent
Rear RPM: 540
Mid PTO: independent (optional)
Mid RPM: 2100

John Deere 4120 Engine detail

Engine Detail
John Deere
turbocharged diesel
Displacement: 148.9 ci
2.4 L
Bore/Stroke: 3.386×4.134 inches
86 x 105 mm
Power: 43.1 hp
32.1 kW
Compression: 20:1
Rated RPM: 2400
Starter volts: 12
Starter power: 2.9 hp
2.2 kW
Oil capacity: 7.9 qts
7.5 L
Coolant capacity: 6.4 qts
6.1 L

John Deere 4120 Transmission overview

Engine Oil

Transmission: PowrReverser
Gears: 12 forward and reverse
Oil capacity: 41.2 qts
39.0 L

John Deere 4120 Dimensions

Wheelbase: 71.5 inches
181 cm
Length: 128.2 inches
325 cm
Width: 65.6 inches
166 cm (R1 tires) to 91.9 (R4 tires)
Height (hood): 62 inches
157 cm
Height (ROPS): 97.2 inches
246 cm
Weight: 3700 lbs
1678 kg
Max Drawbar: 1,103 lbs
500 kg


Is John Deere 4120 a good tractor?

The John Deere 4120 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 4120 take?

Check out the John Deere 4120 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 4120?

The John Deere 4120 was an agricultural tractor model made from 2004 – 2014

How much can a John Deere 4120 Pull?

The max pulling capacity of the John Deere 4120 tractors starts at 11,058 lbs
5015 kg but may be slightly higher depending on the trim.

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