| Manufacturer | John Deere |
| Price | - |
| Model | 7920 |
| Equipment Type | Row-Crop Tractors |
| Factory | Waterloo, Iowa, USA |
ENGINE DETAIL
The John Deere 7920 features a robust turbocharged diesel engine with a displacement of 8.1L, providing a rated power of 197.1hp, making it suitable for demanding agricultural tasks. Its high compression ratio of 16.5:1 enhances fuel efficiency, but may require quality diesel fuel to achieve optimal performance. The dual paper element air cleaner supports better air filtration, vital for prolonging engine life in dusty operating conditions, though maintenance of the air filter is crucial to prevent power loss.
| Description | John Deere turbocharged intercooled diesel 6-cylinder liquid-cooled inline |
| Displacement | 496ci / 8.1L |
| Bore/Stroke | 4.56x5.06inches / 116x 129mm |
| Rated Power (ECE R24) | 197.1hp / 147.0kW |
| Rated Power (EC 97/98) | 205.2hp / 153.0kW |
| Maximum Power (ECE R24) | 211.9hp / 158.0kW |
| Maximum Power (EC 97/68) | 219.9hp / 164.0kW |
| Air cleaner | dual paper elements |
| Compression | 16.5:1 |
| Rated RPM | 2100 |
| Idle RPM | 875-2200 |
| Starter volts | 12 |
| Oil capacity | 25.4qts / 24.0L |
| Coolant capacity | 33.8qts / 32.0L |
JOHN DEERE 7920 ENGINE
The John Deere 7920 features a robust 8.1L 6-cylinder diesel engine, delivering high torque for optimal performance in heavy-duty applications. This engine design enhances fuel efficiency while minimizing emissions, making it suitable for both agricultural and industrial tasks. However, operators should note the potential for higher maintenance costs associated with turbocharger systems and the need for quality diesel to maximize engine longevity.
| Description | John Deere 8.1L 6-cyl diesel |
TRANSMISSION
The John Deere 7920 features an AutoPowr IVT, providing seamless power management with infinite forward and reverse gears, enhancing operator comfort and precision in varying field conditions. This hydro-mechanical transmission allows for optimal engine performance while minimizing fuel consumption, making it highly efficient for tasks requiring varying speed adjustments. However, the complexity of IVT may lead to increased maintenance challenges, especially in harsh operational environments, so regular diagnostics and servicing are recommended to ensure longevity.
| Transmission | AutoPowr IVT |
| Type | infinitely variable transmission |
| Gears | infinite forward and reverse |
| Description | Hydro-mechanical IVT controlled via right-hand speed lever and left-hand reverser lever. Knob on the speed lever adjusts the set speeds for two ranges. Minimum speed of 50 meters per hour (164 feet per hour) |
JOHN DEERE 7920 TRANSMISSION
The John Deere 7920 features an infinitely variable transmission (IVT), which allows for seamless power delivery and efficiency by adjusting engine RPM and ground speed concurrently. This results in improved fuel efficiency and operator comfort, as it minimizes engine strain during operation. However, the complexity of IVT can lead to higher maintenance costs and requires skilled operators to maximize its potential in varied agricultural scenarios.
| Description | infinitely variable transmission |
MECHANICAL
The John Deere 7920 tractor features a four-wheel drive system, enhancing traction and stability across varied terrains, making it suitable for heavy-duty agricultural tasks. Its hydraulic wet disc brakes offer reliable stopping power with reduced maintenance requirements, though they can be affected by prolonged immersion in water. The standard cab provides operator comfort and protection from the elements, but its size may limit maneuverability in tight spaces.
| Description | Four-wheel drive Power steering Hydraulic wet disc brakes Cab standard |
CAPACITY
| Fuel | 103.5gal / 391.7L 94.7gal (With right step) / 358.4L |
| Hydraulic system | 28.5gal / 107.9L |
| Front axle | 15.2qts / 14.4L |
| Front hub | 2 qts/1.9 L |
| HD Front hub | 4 qts/3.8 L |
HYDRAULICS
| Type | closed-center pressure-flow compensated (PFC) |
| Capacity | 28.5gal / 107.9L |
| Pressure | 3046psi / 210.0bar |
| Valves | 7 |
| Pump flow | 32.2gpm / 121.9lpm |
| SCV flow | 30gpm / 113.6lpm |
TRACTOR HITCH
| Rear Type | 3/3N |
| Rear lift | 10050lbs / 4558kg 14000lbsOptOptional / 6350kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Clutch | hydraulic wet discs |
| Rear RPM | 540/1000 (1.375)/1000 (1.75) |
| Engine RPM | 540@1950 / 1000@1950 |
| Front PTO | independent OptOptional |
| Front RPM | 1000 (1.75) |
JOHN DEERE 7920 TIRES
The John Deere 7920 features Ag front tires sized 420/90R30 and rear tires at 480/80R46, which provide enhanced stability and traction during operations, particularly in diverse agricultural settings. The wider rear tires support improved weight distribution and reduce soil compaction, beneficial for tillage and planting applications. However, users should consider potential challenges in tight spaces or uneven terrain due to the tractor's dimensions and tire configuration.
| Ag front | 420/90R30 |
| Ag rear | 480/80R46 |
DIMENSIONS & TIRES
The John Deere 7920 features a wheelbase of 112.6 inches, providing stability during field operations, making it suitable for heavy-duty applications. Its weight range (17,603 to 17,965 pounds) enhances traction but may pose challenges in softer soils, requiring careful management to avoid ground compaction. The tire specifications (front: 420/90R30, rear: 480/80R46) offer a balance of flotation and grip, ideal for diverse terrains in agricultural settings.
| Wheelbase | 112.6inches / 286cm |
| Weight | 17603 to 17965 pounds |
| Front tire | 420/90R30 |
| Rear tire | 480/80R46 |
7920 SERIAL LOCATION
| Description | On tractor frame, front right-hand side |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 150 |
| Batteries | 2 |
| Battery CCA | 925 |
| Battery volts | 12 |