| Manufacturer | John Deere |
| Price | - |
| Model | 7720 |
| Equipment Type | Row-Crop Tractors |
| Factory | Waterloo, Iowa, USA |
ENGINE DETAIL
The John Deere 7720 features a turbocharged 6-cylinder diesel engine with a powerful 167.6 hp (125.0 kW) rated power at 2100 RPM, ensuring robust performance for demanding agricultural tasks. With a 414 ci (6.8L) displacement and a notable compression ratio of 17:1, it delivers excellent torque characteristics, though users should be mindful of the increased maintenance needs associated with higher-performance engines. Its substantial oil (27.5 qts) and coolant (33.8 qts) capacities facilitate longer operational periods between service intervals, making it ideal for extensive fieldwork scenarios.
| Description | John Deere turbocharged diesel 6-cylinder liquid-cooled inline |
| Displacement | 414ci / 6.8L |
| Bore/Stroke | 4.19x5.00inches / 106x 127mm |
| Rated Power (ECE R24) | 167.6hp / 125.0kW |
| Rated Power (EC 97/98) | 172.9hp / 128.9kW |
| Maximum Power (ECE R24) | 179.7hp / 134.0kW |
| Maximum Power (EC 97/68) | 185.1hp / 138.0kW |
| Compression | 17:1 |
| Rated RPM | 2100 |
| Idle RPM | 875-2200 |
| Firing order | 1-5-3-6-2-4 |
| Starter volts | 12 |
| Oil capacity | 27.5qts / 26.0L |
| Coolant capacity | 33.8qts / 32.0L |
JOHN DEERE 7720 ENGINE
The John Deere 7720 features a robust 6.8L 6-cylinder diesel engine, delivering substantial torque and power, which is advantageous for heavy-duty agricultural tasks. However, its fuel efficiency can be a concern in long-term operations, potentially increasing operational costs. Ideal for large farms or commercial operations, the tractor excels in tasks like plowing and tilling, where its power and durability can be fully utilized.
| Description | John Deere 6.8L 6-cyl diesel |
TRANSMISSIONS OVERVIEW
The John Deere 7720 features a 16-speed partial power shift transmission, which allows for efficient power transfer and smoother gear changes, particularly under varying load conditions. The 20-speed infinitely variable transmission option offers seamless speed adjustment without the need for traditional gear shifting, enhancing operator comfort and productivity in diverse agricultural tasks. However, the complexity of these transmissions may require specialized maintenance and could increase repair costs over time.
| Description | 16-speed partial power shift 20-speed infinitely variable transmission |
TRANSMISSION 1
The John Deere 7720's PowrQuad Plus transmission offers 16 forward and reverse gears, combining efficiency with ease of operation for various tasks. The hydraulic wet disc clutch enhances durability and reduces wear during shifting, making it ideal for applications that require frequent directional changes, such as loader work or tilling. However, operators may need to master the power-shift functionality to optimize performance in demanding field 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 7720 tractor's PowrQuad Plus transmission offers 20 forward and reverse gears, allowing for precise speed control and adaptability to various tasks. The hydraulic wet disc clutch ensures smooth engagement and extended durability under heavy load, reducing maintenance frequency. In scenarios requiring rapid direction changes, such as loader work, the left-hand reverser facilitates efficient operation, enhancing productivity in the field.
| 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 7720 features an AutoQuad Plus transmission with 20 forward and reverse speeds, providing versatility for various field conditions. The hydraulic wet disc clutch enhances durability and reduces wear during power-shift operations, which is beneficial in demanding applications. However, operators must be aware of the complexity of the system; understanding load-matched gear shifting is essential for optimizing performance and fuel efficiency in different operational scenarios.
| 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 7720 tractor features an AutoPowr infinitely variable transmission (IVT), providing seamless gear transitions without discrete steps, which enhances operator comfort and efficiency during varied field conditions. Its hydro-mechanical control system allows precise speed adjustments through a right-hand speed lever and a left-hand reverser lever, making it particularly advantageous for tasks requiring frequent direction changes. However, the IVT is only available with four-wheel drive, potentially limiting options for those who might prefer two-wheel drive configurations in less demanding terrain.
| 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 7720 only when equipped with four-wheel drive |
JOHN DEERE 7720 TRANSMISSIONS
The John Deere 7720 features a 16-speed partial power shift transmission, providing smooth gear transitions and allowing for better control during various field operations. In contrast, its 20-speed infinitely variable transmission enhances productivity through continuous speed adjustments, reducing engine strain and improving fuel efficiency. The choice between transmission types depends on operational needs, with the partial power shift being advantageous for repetitive tasks, while the infinitely variable transmission excels in applications requiring constant speed variations.
| Description | 16-speed partial power shift 20-speed infinitely variable transmission |
MECHANICAL
The John Deere 7720 features either two- or four-wheel drive options, providing versatility for varying terrain conditions and enhancing traction. Its power steering ensures maneuverability, while hydraulic wet disc brakes offer superior stopping power and reduced maintenance compared to traditional systems. However, operators should consider potential challenges in serviceability of hydraulic components in the event of failure.
| 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) |
| Engine RPM | 540@1950 / 1000@1950 / 540E@1750 / 1000E@1750 |
| Front PTO | independent OptOptional |
| Front RPM | 1000 (1.375) |
JOHN DEERE 7720 TIRES
The John Deere 7720 features versatile tire options, enabling effective traction in a variety of agricultural applications. The 2WD configuration with 18.4R42 rear tires balances stability and efficiency for general fieldwork, while the 4WD setup improves adherence on challenging terrains such as muddy or inclined fields. A consideration of tire type and tread pattern is crucial for optimizing performance and minimizing soil compaction, particularly in cultivable land scenarios.
| Standard tires (ag) | Front: 11.00-16. Rear: 18.4R42 (2WD) Front: 14.9R30. Rear: 18.4R42 (4WD) |
DIMENSIONS & TIRES
The John Deere 7720 features a wheelbase of 112.6 inches, enhancing stability and maneuverability in various field conditions. Its weight range of 15,501 to 17,033 pounds allows for effective traction, but may present challenges on softer ground due to potential soil compaction. The 2WD system, paired with front and rear tire specifications (11.00-16 and 18.4R42), optimizes performance for standard agricultural tasks, although it may limit off-road capabilities compared to 4WD models.
| Wheelbase | 112.6inches / 286cm |
| Weight | 15501 to 17033 pounds |
| Front tire | 11.00-16 |
| Rear tire | 18.4R42 (2WD) |
7720 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 |