| Manufacturer | John Deere |
| Price | - |
| Model | 7820 |
| Equipment Type | Row-Crop Tractors |
| Factory | Waterloo, Iowa, USA |
ENGINE DETAIL
The John Deere 7820 features a robust turbocharged 8.1L diesel engine with a high compression ratio of 16.5:1, offering a rated power output of 182.4hp and a maximum of 194.5hp at 2100 RPM, ideal for heavy-duty agricultural tasks. With an oil capacity of 25.4 quarts and a coolant capacity of 33.8 quarts, it ensures efficient operation in various conditions, though servicing may require attention to fluid levels for optimal performance. The inline 6-cylinder design provides durability and smooth engine operation, making it suitable for both tillage and transport applications, despite potential challenges related to maintenance of its sophisticated systems.
| Description | John Deere turbocharged diesel 6-cylinder liquid-cooled inline |
| Displacement | 496ci / 8.1L |
| Bore/Stroke | 4.56x5.06inches / 116x 129mm |
| Rated Power (ECE R24) | 182.4hp / 136.0kW |
| Rated Power (EC 97/98) | 189.1hp / 141.0kW |
| Maximum Power (ECE R24) | 194.5hp / 145.0kW |
| Maximum Power (EC 97/68) | 199.8hp / 149.0kW |
| 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 7820 ENGINE
The John Deere 7820 is powered by an 8.1L 6-cyl diesel engine, offering robust torque and efficient fuel consumption, ideal for heavy-duty agricultural tasks. Its engine's design enhances longevity and performance, though maintenance can be more complex due to the size and configuration. Operators may find advantages in increased horsepower for demanding applications, but potential challenges include higher operational costs in terms of fuel and upkeep.
| Description | John Deere 8.1L 6-cyl diesel |
TRANSMISSIONS OVERVIEW
The John Deere 7820 features a 16-speed partial power shift transmission alongside a 20-speed infinitely variable transmission, enhancing operational flexibility and fuel efficiency. The partial power shift allows for seamless shifting under load, ideal for varied field conditions, while the infinitely variable option provides precise speed control, crucial for applications requiring specific speeds. However, transitioning between transmission types may present a learning curve for operators unfamiliar with dual systems.
| Description | 16-speed partial power shift 20-speed infinitely variable transmission |
TRANSMISSION 1
The John Deere 7820's PowrQuad Plus transmission provides a seamless partial power shift across 16 forward and reverse gears, enhancing operational efficiency for varied tasks. The hydraulic wet disc clutch ensures smooth engagement and longevity, reducing maintenance needs. The left-hand reverser facilitates quick direction changes, making it ideal for loader applications or tight maneuvering scenarios.
| Transmission | PowrQuad Plus |
| Type | partial power shift |
| Gears | 16 forward and reverse |
| Clutch | hydraulic wet discs |
| Description | Four power-shift gears (1-4) in four synchronized ranges (A-D) with left-hand reverser. Power shuttle shifting between forward and reverse |
TRANSMISSION 2
The John Deere 7820’s PowrQuad Plus transmission offers 20 forward and reverse gears, providing versatility for varied farming tasks while enhancing operator efficiency. The hydraulic wet disc clutch ensures smooth power transfer and reduces wear, which is beneficial for extended operations. However, users may face a learning curve due to the complexity of the power-shift design, potentially impacting productivity for those unfamiliar with advanced transmission systems.
| Transmission | PowrQuad Plus |
| Gears | 20 forward and reverse |
| Clutch | hydraulic wet discs |
| Description | Four power-shift gears (1-4) in five synchronized ranges (A-E) with left-hand reverser. Power shuttle shifting between forward and reverse |
SPEEDS 1
| Description | With Group 46 rear tires. Reverse speeds are about 4% faster than corresponding forward speed |
TRANSMISSION 3
The John Deere 7820's AutoQuad Plus transmission provides seamless power-shift capability across 20 forward and reverse gears, allowing for enhanced operational efficiency in various field conditions. The hydraulic wet disc clutch offers smoother engagement and reduced wear, making it ideal for extended use. Its automatic load-matched shifting enhances fuel economy and optimizes performance during variable load situations, although operators may need to adapt to the automatic settings for best results.
| Transmission | AutoQuad Plus |
| Gears | 20 forward and reverse |
| Clutch | hydraulic wet discs |
| Description | Four power-shift gears (1-4) in five synchronized ranges (A-E) with left-hand reverser. Power shuttle shifting between forward and reverse. AutoQuad mode offers automatic load-matched gear shifting with standard and economy-shift settings |
SPEEDS 2
| Description | With Group 46 rear tires. Reverse speeds are about 4% faster than corresponding forward speed |
TRANSMISSION 4
The John Deere 7820's AutoPowr IVT allows seamless speed adjustment without gear shifting, ideal for applications requiring precise speed control, such as tilling or spraying. Its hydro-mechanical design features infinite gears for both forward and reverse, enhancing operational efficiency. However, note that the IVT is only available with the four-wheel drive configuration, which may increase initial costs but offers superior traction in challenging terrains.
| 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). The IVT was available on the 7820 only when equipped with four-wheel drive |
JOHN DEERE 7820 TRANSMISSIONS
The John Deere 7820 features a sophisticated 16-speed partial power shift transmission, enabling smooth gear transitions and enhanced efficiency during field operations. The optional 20-speed infinitely variable transmission provides optimal power delivery and fuel efficiency, making it suitable for varying workloads and terrains. However, the complexity of these transmission systems may pose a challenge for maintenance and operator training, requiring familiarity to maximize performance.
| Description | 16-speed partial power shift 20-speed infinitely variable transmission |
MECHANICAL
The John Deere 7820 features a versatile two- or four-wheel drive system, offering enhanced traction and control on various terrains, which is advantageous for both agricultural and utility applications. The hydraulic wet disc brakes provide superior stopping power and reduced maintenance compared to conventional braking systems, while the standard cab offers operator comfort and visibility, reducing fatigue during long work hours. However, the reliance on hydraulic systems may introduce complications and require regular maintenance, particularly in high-dust environments.
| Description | Two- or 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 | 2qts / 1.9L |
| HD Front hub | 4qts / 3.8L |
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 / 540E@1750 / 1000E@1750 |
| Front PTO | independent OptOptional |
| Front RPM | 1000 (1.75) |
JOHN DEERE 7820 TIRES
The John Deere 7820 features standard agricultural tires, providing good traction and soil compaction management. The 2WD configuration with 18.4R42 rear tires enhances stability on hard surfaces, while the 4WD option improves maneuverability in soft or uneven terrain. However, operators should consider tire wear and maintenance, especially in challenging field conditions, where 4WD may provide substantial advantages.
| Standard tires (ag) | Front: 11.00-16. Rear: 18.4R42 (2WD) Front: 14.9R30. Rear: 18.4R42 (4WD) |
DIMENSIONS & TIRES
The John Deere 7820 features a 112.6-inch wheelbase, which enhances stability during field operations, particularly with heavy implements. Weighing between 16,002 and 17,603 pounds, it provides a strong foundation but may pose challenges in mobility on soft or uneven terrain. The 2WD configuration with 11.00-16 front tires and 18.4R42 rear tires offers good traction for general farming tasks, although it may limit performance in mud or hilly landscapes compared to 4WD models.
| Wheelbase | 112.6inches / 286cm |
| Weight | 16002 to 17603 pounds |
| Front tire | 11.00-16 |
| Rear tire | 18.4R42 (2WD) |
7820 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 |