| Manufacturer | John Deere |
| Price | 44,000(USD) |
| Model | 6420 |
| Equipment Type | Utility Tractors |
| Factory | Mannheim, Baden-Württemberg, Germany |
OCED TRACTOR TEST 2007 2
| Description | Diesel Auto Quad 24-speed 4WD January 2002 - February 2002, Link: OCED Tractor Test 2007 file PTO performance Drawbar performance |
| Max power | 75.4hp / 56.2kW |
| Fuel use | 5.5gal/hour / 20.8l/hour |
| Power at rated engine speed | 94.3hp / 70.3kW |
| Power at rated PTO speed | 96.0hp / 71.6kW |
| Max pull | 9,915lbs / 4497kg |
JOHN DEERE 6420 POWER
| Engine | 110hp / 82.0kW |
| PTO (claimed) | 90hp / 67.1kW |
| Drawbar (tested) | 75.4hp / 56.2kW |
| PTO (tested) | 103.9hp / 77.5kW |
ENGINE DETAIL 1
The John Deere 6420, equipped with a Power Tech 4045HL070 engine, offers a robust 110hp at a rated RPM of 2300, making it suitable for various agricultural tasks requiring moderate power. Key specifications include a torque of 273lb-ft at 1500 RPM, which provides excellent low-end performance for heavy pulling applications, though the Tier I emissions rating indicates it is less environmentally friendly compared to later standards. Maintenance considerations include valve clearance settings that require periodic checks (0.014 inches for intake and 0.018 inches for exhaust) to ensure optimal engine performance and longevity.
| Description | John Deere Power Tech 4045HL070 turbocharged diesel 4-cylinder liquid-cooled |
| Displacement | 276ci / 4.5L |
| Bore/Stroke | 4.19x5.00inches / 106x 127mm |
| Emissions | Tier I |
| Power | 110hp / 82.0kW |
| Air cleaner | dry |
| Rated RPM | 2300 |
| Idle RPM | 875-2510 |
| Operating RPM | 1000-2300 |
| Torque | 273lb-ft / 370.2Nm |
| Torque RPM | 1500 |
| Firing order | 1-3-4-2 |
| Starter volts | 12 |
| Starter power | 4hp / 3.0kW |
| Coolant capacity | 14.4qts / 13.6L |
| Intake valve clearance | 0.014inches / 0.356mm |
| Exhaust valve clearance | 0.018inches / 0.457mm |
ENGINE OIL 1
The John Deere 6420 has an oil capacity of 16.8 quarts (15.9 liters) and requires an oil change every 500 hours of operation, which emphasizes the importance of regular maintenance for optimal performance. Keeping track of oil levels and utilizing high-quality lubricants can enhance engine longevity and efficiency. Regular oil changes can mitigate potential engine wear, but extended intervals without checks could lead to reduced lubrication efficiency and potential mechanical issues.
| Oil capacity | 16.8qts / 15.9L |
| Oil change | 500h |
ENGINE DETAIL 2
The John Deere 6420, powered by a 4.5L turbocharged diesel engine, delivers 110 hp and 346 lb-ft of torque at 1500 RPM, making it suitable for various agricultural tasks. Its Denso HPCR fuel injection system enhances fuel efficiency and emissions control, although it complies with the older Tier II standard, which may limit its application in regions with stricter regulations. Key maintenance aspects include managing coolant capacity of 14.4 quarts and maintaining valve clearances (0.014 inches for intake and 0.018 inches for exhaust) to ensure optimal engine performance.
| Description | John Deere Power Tech 4045HL473 turbocharged diesel 4-cylinder liquid-cooled Used a Denso High-Pressure Common Rail (HPCR) fuel injection system. Also engine model 4045HL475 |
| Displacement | 276ci / 4.5L |
| Bore/Stroke | 4.19x5.00inches / 106x 127mm |
| Emissions | Tier II |
| Power | 110hp / 82.0kW |
| Air cleaner | dry |
| Rated RPM | 2300 |
| Idle RPM | 845-2465 |
| Torque | 346lb-ft / 469.2Nm |
| Torque RPM | 1500 |
| Firing order | 1-3-4-2 |
| Starter volts | 12 |
| Starter power | 4hp / 3.0kW |
| Coolant capacity | 14.4qts / 13.6L |
| Intake valve clearance | 0.014inches / 0.356mm |
| Exhaust valve clearance | 0.018inches / 0.457mm |
ENGINE OIL 2
The John Deere 6420 has an oil capacity of 16.8 quarts (15.9 liters), necessitating regular oil changes every 500 hours to maintain optimal engine performance and longevity. Regular maintenance can help prevent engine wear and enhance operational efficiency, especially in demanding agricultural applications. However, owners should be aware that neglecting the oil change interval may lead to increased wear, potential engine damage, or reduced fuel efficiency.
| Oil capacity | 16.8qts / 15.9L |
| Oil change | 500h |
JOHN DEERE 6420 ENGINE
The John Deere 6420 is powered by a robust 4.5L 4-cylinder diesel engine, delivering optimal torque and fuel efficiency for various agricultural applications. Its compact size allows for enhanced maneuverability in tight spaces, making it ideal for small to mid-sized farms. However, given its horsepower range, it may face challenges with heavier implements, necessitating careful consideration of attachment compatibility.
| Description | John Deere 4.5L 4-cyl diesel |
TRANSMISSIONS OVERVIEW
The John Deere 6420 features a versatile transmission system, providing options for 12-speed fully synchronized, 16-speed partial power shift, and a 24-speed partial power shift configuration, allowing for optimized gear selection in various field conditions. The infinitely variable transmission option enhances operational efficiency, facilitating smoother transitions and improved torque management during fieldwork. However, potential complexity in maintenance and higher initial costs for advanced transmission types should be considered, especially for users prioritizing ease of use and simplicity in design.
| Description | 12-speed fully synchronized 16-speed partial power shift 24-speed partial power shift infinitely variable transmission |
TRANSMISSION 1
The John Deere 6420 features a fully synchronized John Deere SyncroPlus transmission, providing smooth gear shifts with 12 forward and 4 reverse options, which is ideal for various agricultural tasks. The wet disc clutch and the possibility of optional creeper gear enhance versatility, allowing for detailed work at low speeds while maintaining control. However, operators must be cautious of potential wear on the clutch from frequent shifting, particularly in demanding conditions.
| Transmission | John Deere SyncroPlus |
| Type | fully synchronized |
| Gears | 12 forward and 4 reverse |
| Clutch | wet disc |
| Oil capacity | 55qts / 52.1L JD HyGard |
| Description | Three gears (1-3) plus reverse (R) in four ranges (A-D). Directional, gear, and range changes are synchronized and may be shifting while moving by using the clutch. Optional creeper adds an additional nine forward and three reverse speeds for a total of 21-forward and 7-reverse. The Syncro Plus Power Reverser adds a fourth gear in the place of reverse, and includes a left-hand reverser lever, for 16 forward and reverse speeds |
SPEEDS 1
| Description | With 18.4x30 R1 rear tires |
TRANSMISSION 2
The John Deere 6420's Power Quad transmission features a partial power shift with 16 forward and reverse gears, enabling efficient operation across diverse tasks. Its wet disc clutch ensures smooth engagement, enhancing durability and reducing maintenance needs. Additionally, the option of a creeper gear set significantly expands versatility for tasks requiring precision, though it requires careful management of the gear shift to optimize performance and prevent gear clash.
| Transmission | John Deere Power Quad |
| Type | partial power shift |
| Gears | 16 forward and reverse |
| Clutch | wet disc |
| Oil capacity | 51.8qts / 49.0L JD HyGard |
| Description | Four gears (1-4) in four ranges (A-D) with reverser lever. Clutchless power shift between gears (1-4) and direction changes (power shuttle). Range shifts (A-D) are synchronized, and may be shifted while the tractor is moving by using the clutch. Optional creeper adds an additional twelve speeds for 28 forward and reverse. The Power Quad uses a gear-shift lever while the Power Quad Plus (cab tractors only) offers push-button gear shifting |
SPEEDS 2
| Description | With 18.4x30 R1 rear tires |
TRANSMISSION 3
The John Deere 6420 features an advanced Power Quad Plus transmission, providing a total of 24 forward and reverse gears, ideal for versatile field operations. Its wet disc clutch ensures smooth engagement, enhancing operator comfort during extended use, while the optional Auto Quad allows for automated gear shifting, thereby optimizing performance based on load dynamics. However, operators should be aware that the push-button shifting requires familiarity to ensure efficient gear changes in varying terrains.
| Transmission | John Deere Power Quad Plus |
| Type | partial power shift |
| Gears | 24 forward and reverse |
| Clutch | wet disc |
| Oil capacity | 52.8qts / 50.0L/JD HyGard |
| Description | Four gears (1-4) in six ranges (A-F) with reverser lever. Push-button power shifting between gears (1-4) and power shuttle directional shifting using the reverser lever. Ranges (A-F) may be shifted on the move by using the clutch. Optional Auto Quad offers automatic gear shifting to match load |
SPEEDS 3
| Description | With 18.4x30 R1 rear tires |
TRANSMISSION 4
The John Deere 6420 features an infinitely variable IVT transmission, allowing seamless speed adjustments without shifting gears, ideal for precision tasks such as planting or tilling. Its integrated creeper mode offers enhanced control at speeds below 2 KPH (1.3 MPH), making it advantageous for operations requiring meticulous movement, but this may not be as beneficial for high-speed tasks. With a 63.4 qts oil capacity of JD Hy-Gard, effective fluid maintenance is crucial for optimal transmission performance and longevity.
| Transmission | John Deere IVT |
| Type | infinitely variable transmission |
| Gears | infinite forward and reverse |
| Oil capacity | 63.4qts / 60.0L JD Hy-Gard |
| Description | Continuously-variable transmission with built-in creeper and left-hand reverser lever. Speed-adjusting dial sets the maximum speed for each band. Setting maximum speed of Band 1 to less than 2 KPH (1.3 MPH) engages creeper mode. Only available on cab tractors |
MECHANICAL
The John Deere 6420 offers flexible drivetrain options with 2WD, MFWD, and 4WD configurations, allowing for versatility across various terrains and field conditions. Its hydrostatic power steering enhances maneuverability, particularly in tight spaces, while hydraulic wet disc brakes provide improved durability and stopping power under heavy loads. With multiple transmission choices, including a 24-speed and infinitely variable transmission, operators can optimize speed and torque for specific tasks such as tillage or transport, though this complexity may require additional operator training.
| Chassis | 4x2 2WD/4x4 MFWD 4WD |
| Steering | hydrostatic power |
| Brakes | hydraulic wet disc |
| Cab | Two-post ROPS. Confort Gard Cab optional |
| Transmissions | 12-speed fully synchronized 16-speed partial power shift 24-speed partial power shift infinitely variable transmission |
CAPACITY
| Fuel | 48.9gal / 185.1L |
| Hydraulic system | 13.7gal / 51.9L 15.9gal / 60.2L (IVT) |
HYDRAULICS
| Type | closed center pressure flow compensated |
| Capacity | 13.7gal / 51.9L 15.9gal / 60.2L (IVT) |
| Pressure | 2900psi / 200.0bar |
| Valves | 4 |
| Pump flow | 25gpm / 94.6lpm |
TRACTOR HITCH
| Rear Type | II |
| Rear lift | 4745lbs / 2152kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540/540/1000 |
| Engine RPM | 1000@2185 |
| Front PTO | optional |
| Front RPM | 1000 |
JOHN DEERE 6420 TIRES
The John Deere 6420 is equipped with standard agricultural tires that optimize traction and stability, with a 2WD variant featuring 10.00-16 front tires and 18.4-34 rear tires, while the 4WD variant has larger 13.6-24 fronts for enhanced pull and maneuverability. The 4WD configuration offers superior field performance, especially in wet or uneven terrain, although it may lead to increased tire wear and maintenance costs. Consider the operational environment; for heavy tillage operations, the 4WD variant is advantageous, while the 2WD may suffice for lighter tasks, reducing initial expenses.
| Standard tires (ag) | Front: 10.00-16. Rear: 18.4-34 (2WD) Front: 13.6-24. Rear: 18.4-34 (4WD) |
DIMENSIONS
| Wheelbase | 94.5inches / 240cm |
| Length | 162.7inches / 413cm |
| Min Width | 61.8inches / 156cm |
| Height | 98.3inches / 249cm |
| Clearance (front axle) | 23.1inches / 58cm (2WD) 18inches / 45cm (4WD) |
| Front tread | 59.7 to 79.4inches / 151to 201cm (4WD) |
| Rear tread | 63.1 to 90.6inches / 160to 230cm |
JOHN DEERE 6420 WEIGHT
| Shipping | 10,064lbs / 4565kg 10,474lbs / 4751kg (4WD) |
| Operating | 11,110lbs / 5039kg (4WD cab) |
| Max capacity | 17,635lbs / 7999kg |
| Max front axle | 11,685lbs / 5300kg (2WD) 12,125lbs / 5499kg (4WD) |
| Max rear axle | 14,325lbs / 6497kg |
DIMENSIONS & TIRES
The John Deere 6420’s wheelbase of 94.5 inches enhances stability during field operations, particularly in row-crop applications. Weighing between 10,064 to 11,110 pounds, it offers a substantial balance between power and maneuverability, although the 2WD configuration may limit traction on uneven terrain or in wet conditions. Its tire specifications, including 10.00-16 front tires and 18.4-34 rear tires, provide effective flotation and soil preservation, making it suitable for diverse agricultural tasks but requiring careful tire choice for specific applications.
| Wheelbase | 94.5inches / 240cm |
| Weight | 10064 to 11110 pounds |
| Front tire | 10.00-16 |
| Rear tire | 18.4-34 (2WD) |
6420 SERIAL NUMBERS
| Location | Serial number plate on the right side of the tractor's main frame |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 90/115/150 |
| Battery volts | 12 |
| Battery AH | 110/154 |