John Deere 8640 VS John Deere 6420 specs comparison

John Deere 8640

General Infos

Make	John Deere
Model	8640
Country	United states
Production	From 1979  Until 1982
Price	-
Tractor type	Four wheel Drive (4WD) tractor
Fuel	diesel
Service repair manual	John Deere 8640 Manual

Dimensions, sizes and tires

AG front tires	18.4-34
AG rear tires	18.4-34
Lawn front tires	-
Lawn rear tires	-
Indus front tires	-
Indus rear tires	-
Weight	28,270 lbs or 12823 kg
Length	223.5 inches [567 cm]
Width	-
Height	126.6 inches [321 cm]
Wheelbase	125 inches [317 cm]
Ground clearance	18.4 inches [46 cm]
Turning radius	-
Rear tread size	63 to 130 inches
Front tread size	63 to 130 inches
Turning radius	-

Horsepower and engin specs

Engine capacity	619 ci or 10.1 L
Cylinders	6 cylinders
Engine power	275 hp or 205.1 kW
Engine RPM	2100 (rpm)
Torque	-
Torque RPM	-
Fuel type	diesel
Fuel injection	-
Fuel tank size	214 gal or 810.0 L
Oil capacity	26 qts or 24.6 L
Oil change	-
Starter motor	-
Starter volts	12 V
Parts And Accessories	John Deere 8640 Parts

Electrical and battery specs

Batteries number	2
Batteries voltage	6 V
Battries Amps	-
Cold Amps	975
Ground force	negative
Charging system	alternator
Charging Volts	-
Charging Amps	90 amps

Clutch and gearbox specs

Trans system	John Deere Quad-Range
Trans type	partial power shift
Trans gears	16 forward and 6 reverse
Clutch system	hydraulic wet disc

Cabine and mechanical specs

Wheel drive	4x4 articulated 4WD
Final drive	-
Steering	articulated power
Braking system	hydraulic wet disc
Cabin type	Cab standard
Differentiel lock	hydraulic front and rear

Hydraulics specifications

System	closed center
Valves	2
Pump flow	33 gpm or 124.9 lpm
SVC flow	-
Steering flow	-
Tank capacity	41 gal or 155.2 L
Hydraulic pressure	-
Max flow	-

Drawbar specifications

Drawbar type	-
Claimed power	-
Drawbar horsepower	203.34 hp or 151.6 kW
Fuel consumption	14.5 gal/hour or 54.9 l/hour
Pulling power	27,782 lbs or 12601 kg

Power take-off (PTO) specs

Claimed power	225 hp or 167.8 kW
Real power	228.75 hp or 170.6 kW
Engine @RPM	1000@2100 (rpm)
PTO Clutch	-
Rear PTO	independent
Rear PTO RPM	1000 (rpm)
Front PTO	-
Front PTO RPM	-
Mid PTO	-
Mid PTO RPM	-
Fuel consumption	14.7 gal/hour or 55.6 l/hour

3 point hitch specifiations

Hitch system	-
Rear hitch	III/IIIN
Rear hitch lift	8545 lbs or 3876 kg
Front hitch	-
Front hitch lift	-

John Deere 6420

General Infos

Make	John Deere
Model	6420
Country	United states
Production	From 2002  Until 2006
Price	44,000  USD
Tractor type	Utility tractor
Fuel	diesel
Service repair manual	John Deere 6420 Manual

Dimensions, sizes and tires

AG front tires	10.00-16
AG rear tires	18.4-3
Lawn front tires	-
Lawn rear tires	-
Indus front tires	-
Indus rear tires	-
Weight	10,064 lbs or 4565 kg
Length	162.7 inches [413 cm]
Width	61.8 inches [156 cm]
Height	98.3 inches [249 cm]
Wheelbase	94.5 inches [240 cm]
Ground clearance	-
Turning radius	-
Rear tread size	63.1 to 90.6 inches
Front tread size	58.7 to 101.7 inches
Turning radius	-

Horsepower and engin specs

Engine capacity	276 ci or 4.5 L
Cylinders	4 cylinders
Engine power	110 hp or 82.0 kW
Engine RPM	2300 (rpm)
Torque	346 lb-ft or 469.2 Nm
Torque RPM	1500 (rpm)
Fuel type	diesel
Fuel injection	-
Fuel tank size	48.9 gal or 185.1 L
Oil capacity	16.8 qts or 15.9 L
Oil change	500 h
Starter motor	-
Starter volts	12 V
Parts And Accessories	John Deere 6420 Parts

Electrical and battery specs

Batteries number	-
Batteries voltage	12 V
Battries Amps	110 amps
Cold Amps	-
Ground force	negative
Charging system	alternator
Charging Volts	-
Charging Amps	90 amps

Clutch and gearbox specs

Trans system	John Deere IVT
Trans type	infinitely variable transmission
Trans gears	infinite forward and reverse
Clutch system	wet disc

Cabine and mechanical specs

Wheel drive	4x2 2WD
Final drive	-
Steering	hydrostatic power
Braking system	hydraulic wet disc
Cabin type	Two-post ROPS
Differentiel lock	-

Hydraulics specifications

System	closed center pressue flow compensated
Valves	4
Pump flow	25 gpm or 94.6 lpm
SVC flow	-
Steering flow	-
Tank capacity	13.7 gal or 51.9 L
Hydraulic pressure	2900 psi or 200.0 bar
Max flow	-

Drawbar specifications

Drawbar type	-
Claimed power	-
Drawbar horsepower	75.4 hp or 56.2 kW
Fuel consumption	5.5 gal/hour or 20.8 l/hour
Pulling power	9,915 lbs or 4497 kg

Power take-off (PTO) specs

Claimed power	90 hp or 67.1 kW
Real power	96.0 hp or 71.6 kW
Engine @RPM	1000@2185 (rpm)
PTO Clutch	-
Rear PTO	independent
Rear PTO RPM	540 (rpm)
Front PTO	optional
Front PTO RPM	1000 (rpm)
Mid PTO	-
Mid PTO RPM	-
Fuel consumption	5.5 gal/hour or 20.8 l/hour

3 point hitch specifiations

Hitch system	-
Rear hitch	II
Rear hitch lift	4745 lbs or 2152 kg
Front hitch	-
Front hitch lift	-

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