John Deere 6420

The John Deere 6420, a stalwart in agricultural circles, epitomizes reliability and versatility. With its powerful engine options, including turbocharged diesel variants, and a range of transmission choices, it’s adept at handling diverse tasks on the farm. Equipped with advanced hydraulic systems and dependable power take-off configurations, it seamlessly integrates with a variety of implements. Its sturdy construction, coupled with precise controls and comfortable cabin options, ensures operators can work efficiently in any condition. From plowing fields to hauling loads, the John Deere 6420 stands as a trusted companion for farmers seeking dependable performance in their daily operations.

Specifications for John Deere 6420 (2002-2006)
TypeUtility tractor
FactoryMannheim, Baden-Württemberg, Germany
Original price (2007)$44,000
Variants
6420Utility chassis
6420LLow-profile chassis
Engine John Deere PowerTech 4045HL070
TypeTurbocharged diesel
Cylinders4-cylinder
CoolingLiquid-cooled
Displacement276 cubic inches (4.5 liters)
Bore/Stroke4.19 x 5.00 inches (106 x 127 mm)
EmissionsTier I
Power110 horsepower (82.0 kW)
PTO (claimed)90 horsepower (67.1 kW)
Drawbar (tested)75.4 horsepower (56.2 kW)
PTO (tested)103.9 horsepower (77.5 kW)
Rated RPM2300
Idle RPM875-2510
Operating RPM1000-2300
Torque273 lb-ft (370.2 Nm) at 1500 RPM
Firing order1-3-4-2
Starter volts12
Starter power4 horsepower (3.0 kW)
Coolant capacity14.4 quarts (13.6 liters)
Intake valve clearance0.014 inches (0.356 mm)
Exhaust valve clearance0.018 inches (0.457 mm)
Air cleanerDry
Engine John Deere PowerTech 4045HL070
TypeTurbocharged diesel
Configuration4-cylinder, liquid-cooled
Displacement276 cubic inches (4.5 liters)
Bore/Stroke4.19 x 5.00 inches (106 x 127 mm)
EmissionsTier I
Power110 horsepower (82.0 kW)
Air cleanerDry
Rated RPM2300
Idle RPM875-2510
Operating RPM1000-2300
Torque273 lb-ft (370.2 Nm) at 1500 RPM
Firing order1-3-4-2
Starter volts12
Starter power4 horsepower (3.0 kW)
Coolant capacity14.4 quarts (13.6 L)
Intake valve clearance0.014 inches (0.356 mm)
Exhaust valve clearance0.018 inches (0.457 mm)
Oil capacity16.8 quarts (15.9 L)
Oil change interval500 hours
Engine John Deere PowerTech 4045HL473
TypeTurbocharged diesel
Configuration4-cylinder, liquid-cooled
Displacement276 cubic inches (4.5 liters)
Bore/Stroke4.19 x 5.00 inches (106 x 127 mm)
EmissionsTier II
Fuel injection systemDenso High-Pressure Common Rail (HPCR)
Power110 horsepower (82.0 kW)
Air cleanerDry
Rated RPM2300
Idle RPM845-2465
Torque346 lb-ft (469.2 Nm) at 1500 RPM
Firing order1-3-4-2
Starter volts12
Starter power4 horsepower (3.0 kW)
Coolant capacity14.4 quarts (13.6 L)
Intake valve clearance0.014 inches (0.356 mm)
Exhaust valve clearance0.018 inches (0.457 mm)
Oil capacity16.8 quarts (15.9 L)
Oil change interval500 hours
Transmission John Deere SyncroPlus
TypeFully synchronized
Gears12 forward and 4 reverse
ClutchWet disc
Oil capacity55 quarts (52.1 L)
Oil typeJD HyGard
NoteFeatures 3 gears (1-3) plus reverse (R) in four ranges (A-D). Optional creeper adds nine additional forward and three reverse speeds for a total of 21-forward and 7-reverse. SyncroPlus Power Reverser option provides 16 forward and reverse speeds.
Transmission John Deere PowrQuad
TypePartial power shift
Gears16 forward and reverse
ClutchWet disc
Oil capacity51.8 quarts (49.0 L)
Oil typeJD HyGard
NoteFeatures four gears (1-4) in four ranges (A-D) with a reverser lever. Optional creeper adds twelve additional speeds for 28 forward and reverse.
Transmission John Deere PowrQuad Plus
TypePartial power shift
Gears24 forward and reverse
ClutchWet disc
Oil capacity52.8 quarts (50.0 L)
Oil typeJD HyGard
NoteFeatures four gears (1-4) in six ranges (A-F) with push-button power shifting and power shuttle directional shifting. Optional AutoQuad offers automatic gear shifting.
Transmission John Deere IVT
TypeInfinitely variable transmission
GearsInfinite forward and reverse
Oil capacity63.4 quarts (60.0 L)
Oil typeJD Hy-Gard
NoteContinuously-variable transmission with built-in creeper and left-hand reverser lever. Speed-adjusting dial sets the maximum speed for each band.
Mechanical
Chassis4×2 2WD / 4×4 MFWD 4WD
SteeringHydrostatic power
BrakesHydraulic wet disc
CabTwo-post ROPS. ComfortGard Cab optional.
Capacity
Fuel48.9 gallons (185.1 liters)
Hydraulic system13.7 gallons (51.9 liters) / 15.9 gallons (60.2 liters for IVT)
Hydraulics
TypeClosed center pressure flow compensated
Capacity13.7 gallons (51.9 liters) / 15.9 gallons (60.2 liters for IVT)
Pressure2900 psi (200.0 bar)
Valves4
Pump flow25 gpm (94.6 lpm)
Tractor Hitch
Rear TypeII
Rear lift4745 lbs (2152 kg)
Power Take-off (PTO)
Rear PTOIndependent
Rear RPM540 / 540/1000
Engine RPM540@2124 / 540@2143 (reversible) / 1000@2208
Front PTOOptional
Front RPM1000
Engine RPM1000@2185
Electrical
GroundNegative
Charging systemAlternator
Charging amps90 / 115 / 150
Battery volts12
Battery AH110 / 154
John Deere 6420 Tires Standard tires (ag)
Front10.00-16 / 13.6-24
Rear18.4-34
Dimensions
Wheelbase94.5 inches (240 cm)
Length162.7 inches (413 cm)
Min Width61.8 inches (156 cm)
Height98.3 inches (249 cm)
Clearance (front axle)23.1 inches (58 cm – 2WD) / 18 inches (45 cm – 4WD)
Front tread58.7 to 101.7 inches (149 to 258 cm – 2WD) / 59.7 to 79.4 inches (151 to 201 cm – 4WD)
Rear tread63.1 to 90.6 inches (160 to 230 cm)
John Deere 6420 Weight
Shipping10,064 lbs (4565 kg) / 10,474 lbs (4751 kg – 4WD)
Operating11,110 lbs (5039 kg – 4WD cab)
Max capacity17,635 lbs (7999 kg)
Max front axle11,685 lbs (5300 kg – 2WD) / 12,125 lbs (5499 kg – 4WD)
Max rear axle14,325 lbs (6497 kg)
John Deere 6420 overview

The John Deere 6420 stands as a testament to the enduring legacy of John Deere’s commitment to excellence in agricultural machinery. As a utility tractor, the 6420 embodies versatility, reliability, and power, making it an indispensable tool for farmers and agricultural professionals worldwide.
Manufactured between 2002 and 2006 at the John Deere factory in Mannheim, Baden-Württemberg, Germany, the 6420 boasts a robust construction designed to tackle a wide range of tasks with ease. Available in both utility and low-profile chassis variants, this tractor offers flexibility to suit various operational requirements.

At the heart of the John Deere 6420 lies a formidable engine – the John Deere PowerTech 4045HL series. This turbocharged diesel engine, available in models 4045HL070, 4045HL473, and 4045HL475, delivers reliable performance and ample power to handle demanding agricultural tasks. With a displacement of 276 cubic inches (4.5 liters) and power output of 110 horsepower, the 6420 ensures efficient operation across diverse applications.

The engine is equipped with advanced features such as a Denso High-Pressure Common Rail (HPCR) fuel injection system, ensuring precise fuel delivery for optimal performance and fuel efficiency. With Tier I and Tier II emissions compliance, the 6420 meets stringent environmental standards while maximizing productivity.

In terms of transmission options, the John Deere 6420 offers a range of choices to suit different preferences and operational needs. Whether it’s the fully synchronized 12-speed SyncroPlus transmission, the partial power shift PowrQuad transmission with 16 or 24 forward and reverse gears, or the infinitely variable transmission (IVT) for seamless speed control, operators can select the transmission that best fits their requirements.

The tractor’s hydraulic system, featuring a closed center pressure flow compensated design, ensures smooth and responsive operation of implements and attachments. With a capacity ranging from 13.7 to 15.9 gallons (51.9 to 60.2 liters), four valves, and a pump flow of 25 gpm (94.6 lpm), the hydraulic system delivers the necessary power and precision for efficient hydraulic functions.

Equipped with a dependable power take-off (PTO) system, the John Deere 6420 offers flexibility for various implements, with independent rear PTO and optional front PTO configurations available. The tractor’s electrical system, including a negative ground, alternator charging system, and multiple battery options, ensures reliable power delivery for uninterrupted operation.

In terms of dimensions and weight, the John Deere 6420 strikes a balance between maneuverability and stability. With a wheelbase of 94.5 inches (240 cm) and dimensions ranging from 162.7 inches to 98.3 inches (413 cm to 249 cm) in length and height respectively, the tractor offers sufficient size for effective operation while remaining agile in the field. Depending on configuration, the 6420 weighs between 10,064 lbs to 11,110 lbs (4565 kg to 5039 kg), with maximum capacity and axle load ratings ensuring stability and safety during operation.

John Deere 6420 epitomizes the qualities of a dependable workhorse in the agricultural sector. With its robust construction, powerful engine, versatile transmission options, and advanced hydraulic and electrical systems, this tractor stands ready to tackle the challenges of modern farming, helping operators achieve optimal efficiency and productivity with every task.

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