Introduction
John Deere 3120 Compact Utility Tractor
The John Deere 3120 is a compact utility tractor produced between 2005 and 2008 as part of the 3320 series. Manufactured in Augusta, Georgia, USA, this machine is designed for versatility in agricultural, landscaping, and property maintenance applications.
Engine and Performance
The tractor is powered by a liquid-cooled, 3-cylinder Yanmar 3TNV84 diesel engine. With a displacement of 1.5 liters, it produces 29.5 horsepower (22.0 kW) at a rated speed of 2600 RPM. The engine utilizes direct injection and operates with a compression ratio of 18.5:1, meeting Tier II emission standards.
Transmission and Drivetrain
Equipped with a Sauer-Danfoss eHydro hydrostatic transmission, the 3120 features three speed ranges with infinite forward and reverse gears. Operation is managed via two foot pedals. Advanced electronic management systems include SpeedMatch for maximum speed limitation, MotionMatch for acceleration rate adjustment, and LoadMatch, which automatically adjusts tractor speed to maintain engine RPM under load. The tractor is equipped with four-wheel drive and wet disc brakes.
Hydraulics and Hitch
The hydraulic system is an open-center type with a total flow of 13.9 gpm (52.6 lpm) and a dedicated pump flow of 8.6 gpm (32.6 lpm). It supports up to five valves for implement control. The rear of the tractor is fitted with a Category I hitch capable of lifting 2530 lbs (1147 kg) at the link ends. An independent rear PTO (540 RPM) is standard, with an optional mid-mounted PTO (2100 RPM) available.
Dimensions and Chassis
The 3120 has a wheelbase of 68 inches and an operating weight of 3000 lbs (1360 kg). It features a two-post folding ROPS for operator safety. The machine offers a minimum width of 52.4 inches and a rear axle clearance of 12.2 inches, providing stability across various terrains.
Conclusion
The John Deere 3120 is a robust, well-rounded compact utility tractor suitable for operators requiring a balance of power and maneuverability. Its hydrostatic transmission features make it particularly efficient for tasks involving frequent directional changes or varying load conditions.
John Deere 3120 Manuals & Documentation
Download the manuals and documentation available for the John Deere 3120: repair and workshop manuals, operator's handbooks, spare-parts catalogs and technical leaflets — free PDF files.
- Manuel d'atelier - page 001 à 050PDF · 40.09 Mo
- Manuel d'atelier - page 051 à 100PDF · 42.582 Mo
- Manuel d'atelier - page 101 à 150PDF · 40.385 Mo
- Manuel d'atelier - page 151 à 200PDF · 42.303 Mo
- Manuel d'atelier - page 201 à 250PDF · 39.946 Mo
- Manuel d'atelier - page 251 à 301PDF · 39.42 Mo
- Réglages moteursPDF · 0.219 Mo
Archive documentation provided for reference, hosted by Tractor-Info.
Production Information of John Deere, 3120
- Compact Utility tractor
- Built in Augusta, Georgia, USA
| Manufacturer | John Deere |
|---|
Dimension and Tires Information of John Deere, 3120
| Clearance (rear axle) | 12.2 inches [30 cm] |
|---|---|
| Wheelbase | 68 inches [172 cm] |
| Height (ROPS) | 93.3 inches [236 cm] |
| Height (hood) | 57 inches [144 cm] |
| Length | 120.2 inches [305 cm] |
| Rear tread | 40.6/45.3/48.9/53.1/56.6 inches [103/115/124/134/143 cm] |
| Weight | 3000 lbs [1360 kg] |
| Width | 52.4 inches [133 cm] |
Minimum
| Industrial front | 25x8.5-14 |
|---|---|
| Ag front | 7-14 |
| Lawn/turf front | 25x10.5LL-15 |
| Lawn/turf rear | 41x14-20 |
| Ag rear | 11.2-24 |
| Industrial rear | 15-19.5 |
| Lawn/turf rear | 41x18LL-16.1 |
| Lawn/turf front | 27x8.5-15 |
| Industrial rear | 43x16-20 |
| Industrial front | 27x8.5-15 |
Engine Specifications of John Deere, 3120
- Yanmar 3TNV84
- Liquid-cooled
- 3-cylinder
- Diesel
| Coolant capacity | 5.6 qts [5.3 L] |
|---|---|
| Oil capacity | 5.1 qts [4.8 L] |
| Power | 29.5 hp [22.0 kW] |
| Rated RPM | 2600 |
| Compression | 18.5:1 |
| Displacement | 91.5 ci [1.5 L] |
| Emissions | Tier II |
| Fuel system | Direct injection |
| Bore/Stroke | 3.3x3.54 inches [84 x 90 mm] |
| Starter volts | 12 |
| Torque RPM | 1560 |
| Torque | 66.7 lb-ft [90.4 Nm] |
Transmission Information of John Deere, 3120
Transmission variants 1
- Controlled by two foot pedals and range shift lever. Tractor must be stopped before shifting ranges. Cruise control standard. SpeedMatch allows maximum speed to be limited. MotionMatch allows acceleration rate to be set. LoadMatch allows engine RPMs to be set, tractor will adjust speed to maintain RPMs.
| Transmission | Sauer-Danfoss eHydro |
|---|---|
| Type | Hydrostatic |
| Gears | Infinite forward and reverse (3-range) |
Mechanical Specs of John Deere, 3120
- Four-wheel drive
- Two-post folding ROPS.
- Wet disc brakes
| Steering | Power |
|---|
Power Information of John Deere, 3120
| Rear PTO | Independent |
|---|---|
| Mid PTO Type | 2100 |
| Rear PTO Type | 540 |
| Mid PTO | Optional |
Hydraulics Specifications of John Deere, 3120
| Type | Open center |
|---|---|
| Total flow | 13.9 gpm [52.6 lpm] |
| Pump flow | 8.6 gpm [32.6 lpm] |
| Capacity | 6.8 gal [25.7 L] |
| Valves | 5 |
Three-Point Hitch of John Deere, 3120
| Rear Type | I |
|---|---|
| Rear lift (at ends) | 2530 lbs [1147 kg] |
Electrical System of John Deere, 3120
| Ground | Negative |
|---|---|
| Battery volts | 12 |
| Charging amps | 40 |
| Battery CCA | 500 |
Where it sits
With 29 HP, the John Deere 3120 sits just below 3320 (32 HP) in John Deere's range. Its power puts it in the 15th percentile of 2000s models in our database (2822 machines).
Frequently asked questions
How much horsepower does the John Deere 3120 have?
The John Deere 3120 delivers 29 HP.
What years was the John Deere 3120 produced?
The John Deere 3120 was produced in 2005-2008.
What engine does the John Deere 3120 have?
The John Deere 3120 is powered by a Diesel, 3-cylinder engine.
What transmission does the John Deere 3120 use?
The John Deere 3120 uses a Sauer-Danfoss eHydro transmission.
How much does the John Deere 3120 weigh?
The John Deere 3120 weighs 3000 lbs [1360 kg].
Is the John Deere 3120 4WD?
The John Deere 3120 is available in 4WD.