| Manufacturer | John Deere |
| Price | - |
| Model | 4120 |
| Equipment Type | Compact Utility Tractors |
| Factory | Augusta, Georgia, USA |
JOHN DEERE 4120 POWER
| Engine | 43.1hp / 32.1kW |
| PTO (claimed) | 35hp / 26.1kW |
ENGINE DETAIL
The John Deere 4120, equipped with a turbocharged diesel 4-cylinder engine, has a notable displacement of 2.4L and a robust power output of 43.1 hp, making it suitable for various agricultural applications. With a high compression ratio of 20:1, it ensures efficient fuel combustion, yet it may require high-quality diesel to prevent knocking. Key considerations include its oil and coolant capacities, which stand at 7.9 quarts and 6.4 quarts respectively; proper maintenance is vital to optimize performance and prevent overheating during prolonged use.
| Description | John Deere turbocharged diesel 4-cylinder liquid-cooled |
| Displacement | 148.9ci / 2.4L |
| Bore/Stroke | 3.386x4.134inches / 86x 105mm |
| Power | 43.1hp / 32.1kW |
| Compression | 20:1 |
| Rated RPM | 2400 |
| Starter volts | 12 |
| Starter power | 2.9hp / 2.2kW |
| Oil capacity | 7.9qts / 7.5L |
| Coolant capacity | 6.4qts / 6.1L |
JOHN DEERE 4120 ENGINE
The John Deere 4120 features a robust 2.4L 4-cylinder diesel engine, providing efficient fuel consumption while delivering significant torque for various agricultural tasks. Its compact size enables maneuverability in tight spaces, making it ideal for smaller farms or landscaping applications. However, the limited power output may restrict its effectiveness for heavy-duty operations compared to larger models.
| Description | John Deere 2.4L 4-cyl diesel |
TRANSMISSIONS OVERVIEW
The John Deere 4120 features a 12-speed hydrostatic transmission, allowing for seamless speed adjustments and efficient operation in varying field conditions. This transmission type enhances control, especially in applications requiring precise movements, such as tilling or plowing. However, hydrostatic systems can be more complex and may require additional maintenance compared to traditional gear systems, so proper service practices are essential.
| Description | 12-speed hydrostatic |
TRANSMISSION 1
The John Deere 4120 features a PowrReverser transmission with 12 forward and reverse gears, providing enhanced maneuverability and speed control for various agricultural tasks. Its oil capacity of 41.2 quarts (39.0 liters) allows for efficient lubrication and heat dissipation, which is crucial for prolonged operation. While the PowrReverser system enables easier direction changes without clutching, regular maintenance of the transmission fluid is essential to ensure optimal performance and longevity.
| Transmission | PowrReverser |
| Gears | 12 forward and reverse |
| Oil capacity | 41.2qts / 39.0L |
SPEEDS 1
| Description | With 13.6-28 rear tires |
TRANSMISSION 2
The John Deere 4120 features an eHydro transmission, providing infinite forward and reverse gears, which enhances maneuverability in tight spaces, ideal for varied terrain and precision tasks. The hydrostatic system allows for seamless speed and direction changes, reducing operator fatigue. Its oil capacity of 38.4 quarts ensures adequate lubrication and heat dissipation, essential for maintaining performance during prolonged operations.
| Transmission | eHydro |
| Type | hydrostatic |
| Gears | infinite forward and reverse |
| Oil capacity | 38.4qts / 36.3L |
SPEEDS 2
| Description | With 16.3-28 rear tires |
MECHANICAL
The John Deere 4120 tractor features a 4x4 MFWD (Multi-Front Wheel Drive) chassis, which enhances traction and stability in various terrains, particularly useful in agricultural applications. Its hydrostatic power steering allows for precise maneuverability, reducing operator fatigue during extended use. The 12-speed hydrostatic transmission offers versatile speed control and efficient power management, ideal for tasks requiring variable speed settings such as tilling or planting.
| Chassis | 4x4 MFWD 4WD |
| Steering | hydrostatic power |
| Cab | ROPS |
| Transmissions | 12-speed/hydrostatic |
CAPACITY
| Fuel | 14.5gal / 54.9L |
| Hydraulic system | 10.3gal / 39.0L 9.6gal / 36.3L (eHydro) |
HYDRAULICS
| Type | open center |
| Capacity | 10.3gal / 39.0L 9.6gal / 36.3L (eHydro) |
| Pressure | 2500psi / 172.4bar |
| Pump flow | 12gpm / 45.4lpm |
| Total flow | 17.1gpm / 64.7lpm |
| Steering flow | 5.1gpm / 19.3lpm |
TRACTOR HITCH
| Rear Type | I |
| Rear lift (at ends) | 3,130lbs / 1419kg |
| Rear lift (at 24 | 2,500lbs / 1134kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540 |
| Mid PTO | independent (optional) |
| Mid RPM | 2100 |
JOHN DEERE 4120 TIRES
The John Deere 4120, equipped with agricultural front tires (8.00-16) and rear tires (13.6-28), offers a balanced traction-to-weight ratio, facilitating effective tillage and transport tasks. The smaller front tires enhance maneuverability while the larger rear tires provide stability, enabling optimal performance in various soil conditions. However, a potential challenge may arise in wet conditions, as the tire profile may become prone to rutting if not managed properly.
| Ag front | 8.00-16 |
| Ag rear | 13.6-28 |
DIMENSIONS
| Wheelbase | 71.5inches / 181cm |
| Length | 128.2inches / 325cm |
| Width | 65.6inches / 166cm (R1 tires) to 91.9 (R4 tires) |
| Height (hood) | 62inches / 157cm |
| Height (ROPS) | 97.2inches / 246cm |
| Weight | 3700lbs / 1678kg |
| Max Drawbar | 1,103lbs / 500kg |
DIMENSIONS & TIRES
The John Deere 4120's 71.5-inch wheelbase provides stability and agility, making it suitable for maneuvering in tight spaces. Weighing 3,700 lbs, it offers a good balance of power and traction, although it may face challenges in navigating soft soil conditions due to its weight. The tire specifications (front: 8.00-16, rear: 13.6-28) indicate a capacity for handling moderate to heavy loads, enhancing overall performance in agricultural tasks but may limit versatility in extremely rugged terrains.
| Wheelbase | 71.5inches / 181cm |
| Weight | 3700lbs / 1678kg |
| Front tire | 8.00-16 |
| Rear tire | 13.6-28 |
ATTACHMENT OVERVIEW
| Description | Front-end loader Backhoe |
JOHN DEERE 400X LOADER
| Loader weight | 927lbs / 420kg |
| Height (to pin) | 112.8inches / 286cm |
| Dump reach | 24.7inches / 62cm |
| Dump angle | 46° |
| Rollback angle | 31° |
| Breakout force (at pin) | 3506lbs / 1590kg |
| Breakout force (at 500mm) | 2641lbs / 1197kg |
| Lift to full height (at pin) | 2368lbs / 1074kg |
| Lift to full height (at 500mm) | 1742lbs / 790kg |
| Lift to 1.5m (at pin) | 2634lbs / 1194kg |
| Lift to 1.5m (at 500mm) | 2181lbs / 989kg |
| Raise time to height | 3.68 s |
| Bucket dump time | 2.44 s |
| Lowering time | 2.48 s |
| Rollback time | 1.44 s |
JOHN DEERE 400CX (MSL) LOADER
| Loader weight | 1100lbs / 498kg |
| Height (to pin) | 110.9inches / 281cm |
| Dump reach | 27.5inches / 69cm |
| Dump angle | 45° |
| Rollback angle | 41° |
| Breakout force (at pin) | 3512lbs / 1593kg |
| Breakout force (at 500mm) | 3159lbs / 1432kg |
| Lift to full height (at pin) | 2194lbs / 995kg |
| Lift to full height (at 500mm) | 2339lbs / 1060kg |
| Lift to 1.5m (at pin) | 2627lbs / 1191kg |
| Lift to 1.5m (at 500mm) | 2576lbs / 1168kg |
| Raise time to height | 3.68 s |
| Bucket dump time | 1.6 s |
| Lowering time | 2.48 s |
| Rollback time | 1.1 s |
JOHN DEERE 485 BACKHOE
| Backhoe type | John Deere 485 Backhoe |
| Weight | 1460lbs / 662kg |
| Transport height | 90inches / 228cm |
| Digging depth | 105inches / 266cm |
| Reach from pivot | 142inches / 360cm |
| Loading height | 88inches / 223cm |
| Bucket Rotation | 180 |
| Swing Arc | 180 |
| Bucket force | 3730lbs / 1691kg |
| Dipperstick force | 2435lbs / 1104kg |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 75 |
| Battery CCA | 770 |
| Battery volts | 12 |