John Deere 6420

John Deere 6420 Technical Specifications

John Deere 6420 is a Row-Crop tractor that was produced by the John Deere between 2002 – 2006.

Below you will find detailed technical specifications for John Deere 6420 covering engine types, horsepower ratings, weight, height, fuel type and tank volume, oil capacity and type, hydraulic system diagram, wiring diagram, battery specs, etc.

John Deere 6420 Production

Manufacturer: John Deere
Type: Utility tractor
Factory: Mannheim, Baden-Wurttemberg, Germany
Original price: $44,000 (2007)

John Deere 6420 Power

Engine: 110 hp
82.0 kW
PTO (claimed): 90 hp
67.1 kW
Drawbar (tested): 75.4 hp
56.2 kW
PTO (tested): 103.9 hp
77.5 kW

John Deere 6420 Electrical

Ground: negative
Charging system: alternator
Charging amps: 90
Battery volts: 12
Battery AH: 110

John Deere 6420 Mechanical

Chassis: 4×2 2WD
  4×4 MFWD 4WD
Steering: hydrostatic power
Brakes: hydraulic wet disc
Cab: Two-post ROPS. ConfortGard Cab optional.
Transmissions: 12-speed fully synchronized
  16-speed partial power shift
  24-speed partial power shift
  infinitely variable transmission


Fuel: 48.9 gal
185.1 L
Hydraulic system: 13.7 gal
51.9 L
  15.9 gal
60.2 L (IVT)


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

Tracktor Hitch

Rear Type: II
Rear lift: 4745 lbs
2152 kg

Power Take-off (PTO)

Rear PTO: independent
Rear RPM: 540
Engine RPM: 540@2124
540@2143 (reversible)
Front PTO: optional
Front RPM: 1000
Engine RPM: 1000@2185

John Deere 6420 Engine detail

Engine Detail
John Deere PowerTech 4045HL070
turbocharged diesel
Displacement: 276 ci
4.5 L
Bore/Stroke: 4.19×5.00 inches
106 x 127 mm
Emissions: Tier I
Power: 110 hp
82.0 kW
Air cleaner: dry
Rated RPM: 2300
Idle RPM: 875-2510
Operating RPM: 1000-2300
Torque: 273 lb-ft
370.2 Nm
Torque RPM: 1500
Firing order: 1-3-4-2
Starter volts: 12
Starter power: 4 hp
3.0 kW
Coolant capacity: 14.4 qts
13.6 L
Intake valve clearance: 0.014 inches
0.356 mm
Exhaust valve clearance: 0.018 inches
0.457 mm

John Deere 6420 Transmission overview

Engine Oil

Transmission: John Deere SyncroPlus
Type: fully synchronized
Gears: 12 forward and 4 reverse
Clutch: wet disc
Oil capacity: 55 qts
52.1 L
Oil type:
JD HyGard

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.

John Deere 6420 Dimensions

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

John Deere 6420 Weight
Shipping: 10,064 lbs
4565 kg
  10,474 lbs
4751 kg (4WD)
Operating: 11,110 lbs
5039 kg (4WD cab)
Max capacity: 17,635 lbs
7999 kg
Max front axle: 11,685 lbs
5300 kg (2WD)
  12,125 lbs
5499 kg (4WD)
Max rear axle: 14,325 lbs
6497 kg

John Deere 6420 Tests

OCED Tractor Test 2007

OCED Tractor Test 2007
Diesel AutoQuad 24-speed 4WD
January 2002 – February 2002,
Link: OCED Tractor Test 2007 file
PTO performance
Max power: 103.9 hp
77.5 kW
Fuel use: 5.5 gal/hour
20.8 l/hour
Power at rated engine speed: 94.3 hp
70.3 kW
Fuel use: 5.6 gal/hour
21.2 l/hour
Power at rated PTO speed: 96.0 hp
71.6 kW
Fuel use: 5.5 gal/hour
20.8 l/hour
Drawbar performance
Max power: 75.4 hp
56.2 kW
Fuel use: 5.5 gal/hour
20.8 l/hour
Max pull: 9,915 lbs
4497 kg


Is John Deere 6420 a good tractor?

The John Deere 6420 is one of the great tractors in the John Deere stable, and it has earned John Deere a fantastic reputation.

How much oil does a John Deere 6420 take?

Check out the John Deere 6420 oil capacity and oil type in the engine specs section as it may vary across the engines. Keep in mind, that older models might have their oil capacity increased over time. You may compare between the early and late oil capacity.

Do tractors have VIN numbers?

Every tractor has a VIN number. The number is usually engraved below the driver’s seat. Tractor manufacturers put the number in different places on the tractor body.

What was the last year John Deere made the 6320

The John Deere 6420 was an agricultural tractor model made from 2002 – 2006

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