John Deere 6420

Name: John Deere 6420
Brand: John Deere

Power

110 hp

Production

2002-2006

Transmission

John Deere SyncroPlus

Drive

2WD/4WD

100–140 HP 2000s

From the same series:

6320

Introduction

John Deere 6420 Utility Tractor

The John Deere 6420 is a versatile utility tractor manufactured in Mannheim, Germany, between 2002 and 2006. It belongs to the 6020 series, designed to provide reliable performance for diverse agricultural applications, offering both two-wheel and four-wheel drive configurations.

Engine and Performance

The tractor is powered by a 4.5-liter, four-cylinder liquid-cooled engine (model 4045HL475) delivering 110 hp (82.0 kW). It utilizes a Denso High-Pressure Common Rail (HPCR) fuel injection system and meets Tier II emissions standards. The engine operates at a rated speed of 2300 RPM, with a maximum torque of 346 lb-ft reached at 1500 RPM.

Transmission Options

The 6420 offers four distinct transmission choices to suit various operational needs. These include the fully synchronized SyncroPlus (12 forward/4 reverse), the partial power shift PowrQuad (16 forward/16 reverse), the PowrQuad Plus (24 forward/24 reverse), and the Infinitely Variable Transmission (IVT). All versions feature wet disc clutches and are designed for smooth directional and gear changes.

Hydraulics and Hitch

The hydraulic system is a closed-center, pressure-flow compensated type, delivering a pump flow of 25 gpm (94.6 lpm) at a pressure of 2900 psi (200 bar). The rear hitch is Category II, capable of lifting up to 4745 lbs (2152 kg). An independent rear PTO is standard, with an optional front PTO available for increased versatility.

Operator Environment and Dimensions

The tractor is equipped with a two-post ROPS as standard, with the ComfortGard cab available as an option. Steering is managed via a hydrostatic power system, while braking is handled by hydraulic wet disc brakes. The machine has a wheelbase of 94.5 inches and a minimum width of 61.8 inches, facilitating maneuverability in various field conditions.

Conclusion

"The John Deere 6420 is a robust utility tractor suited for a wide range of medium-duty agricultural tasks. Its variety of transmission options and hydraulic capacity make it a flexible choice for operators requiring a balance of power and precision in a mid-sized platform."

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Introduction

Production Information of John Deere, 6420

The production information of the tractor (6420) includes details about its manufacturing.

Utility tractor

Built in Mannheim, Baden-Württemberg, Germany


Manufacturer	John Deere
Original price	$44,000 (2007)

Dimension and Tires Information of John Deere, 6420

This section sums up the dimension and tires information of the tractor.


Front tread	58.7 to 101.7 inches [149 to 258 cm (2WD)]
Wheelbase	94.5 inches [240 cm]
Clearance (front axle)	23.1 inches (2WD) [58 cm]
Height	98.3 inches [249 cm]
Length	162.7 inches [413 cm]
Front tread	59.7 to 79.4 inches [151 to 201 cm (4WD)]
	18 inches (4WD) [45 cm]
Min Width	61.8 inches [156 cm]
Rear tread	63.1 to 90.6 inches [160 to 230 cm]


Standard tires (ag)	Front: 10.00-16. Rear: 18.4-34 (2WD)
	Front: 13.6-24. Rear: 18.4-34 (4WD)

Engine Specifications of John Deere, 6420

Get the specifications for the engine and if different options are available.

Liquid-cooled

Used a Denso High-Pressure Common Rail (HPCR) fuel injection system. Also engine model 4045HL475


Starter volts	12
Firing order	1-3-4-2
Exhaust valve clearance	0.018 inches [0.457 mm]
Emissions	Tier II
Starter power	4 hp [3.0 kW]
Air cleaner	Dry
Rated RPM	2300
Power	110 hp [82.0 kW]
Bore/Stroke	4.19x5.00 inches [106 x 127 mm]
Oil capacity	16.8 qts [15.9 L]
Oil change	500 h
Displacement	276 ci [4.5 L]
Torque RPM	1500
Coolant capacity	14.4 qts [13.6 L]
Intake valve clearance	0.014 inches [0.356 mm]
Torque	346 lb-ft [469.2 Nm]
Idle RPM	845-2465

Transmission Information of John Deere, 6420Y

Discover all variants of transmission available for this tractor model.

Transmission variants 1

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 SyncroPlus Power Reverser adds a fourth gear in the place of reverse, and includes a left-hand reverser lever, for 16 forward and reverse speeds.


	JD HyGard
Transmission	John Deere SyncroPlus
Oil capacity	55 qts [52.1 L]
Clutch	Wet disc
Type	Fully synchronized
Oil type	JD HyGard
Gears	12 forward and 4 reverse

Transmission variants 2

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 PowrQuad uses a gear-shift lever while the PowrQuad Plus (cab tractors only) offers push-button gear shifting.


	JD HyGard
Transmission	John Deere PowrQuad
Oil capacity	51.8 qts [49.0 L]
Clutch	Wet disc
Type	Partial power shift
Oil type	JD HyGard
Gears	16 forward and reverse

Transmission variants 3

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 AutoQuad offers automatic gear shifting to match load.


	JD HyGard
Transmission	John Deere PowrQuad Plus
Oil capacity	52.8 qts [50.0 L]
Clutch	Wet disc
Type	Partial power shift
Oil type	JD HyGard
Gears	24 forward and reverse

Transmission variants 4

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.


Transmission	John Deere IVT
Oil type	JD Hy-Gard
Oil capacity	63.4 qts [60.0 L]
Type	Infinitely variable transmission
	JD Hy-Gard
Gears	Infinite forward and reverse

12-speed fully synchronized

Infinitely variable transmission

16-speed partial power shift

24-speed partial power shift

Mechanical Specs of John Deere, 6420Y

This section summarizes all mechanical information such as the brake system and other specifications.

Two- or four-wheel drive

Two-post ROPS. ConfortGard Cab optional.

Hydraulic wet disc brakes


Steering	Hydrostatic power

Power Information of John Deere, 6420Y

Discover the power specifications and options available for this tractor model but also PTO (Power Take-off) information.


Front PTO	Optional
Rear PTO	Independent
	540@2143 (reversible)
Engine RPM	540@2124
Rear PTO Type	540
Front PTO Type	1000
	1000@2208
	540/1000
Engine RPM	1000@2185

Hydraulics Specifications of John Deere, 6420

Hydraulic system type, pressure, pump flow and valves.


Type	Closed center pressue flow compensated
Valves	4
Pressure	2900 psi [200.0 bar]
Capacity	13.7 gal [51.9 L]
Pump flow	25 gpm [94.6 lpm]
	15.9 gal (IVT) [60.2 L]

Three-Point Hitch of John Deere, 6420

Hitch category and rear/front lift capacity.


Rear Type	II
Rear lift	4745 lbs [2152 kg]

Electrical System of John Deere, 6420

Battery voltage, charging system and ground.


Battery AH	110
Ground	Negative
	150
	115
Charging system	Alternator
	154
Battery volts	12
Charging amps	90

Frequently asked questions

How much horsepower does the John Deere 6420 have?

The John Deere 6420 delivers 110 HP.

What years was the John Deere 6420 produced?

The John Deere 6420 was produced in 2002-2006.

What transmission does the John Deere 6420 use?

The John Deere 6420 uses a John Deere SyncroPlus transmission.

Is the John Deere 6420 4WD?

The John Deere 6420 is available in 2WD/4WD.

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