John Deere 8640 VS David Brown 25 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	-

David Brown 25

General Infos

Make	David Brown
Model	25
Country	United states
Production	From 1953  Until 1958
Price	-
Tractor type	-
Fuel	diesel
Service repair manual	David Brown 25 Manual

Dimensions, sizes and tires

AG front tires	6.00-19
AG rear tires	11-28
Lawn front tires	-
Lawn rear tires	-
Indus front tires	-
Indus rear tires	-
Weight	3,715 lbs or 1685 kg
Length	113 inches [287 cm]
Width	-
Height	-
Wheelbase	74.8 inches [189 cm]
Ground clearance	15.4 inches [39 cm]
Turning radius	-
Rear tread size	48 to 68 inches
Front tread size	49.5 to 62 inches
Turning radius	-

Horsepower and engin specs

Engine capacity	154 ci or 2.5 L
Cylinders	4 cylinders
Engine power	32 hp or 23.9 kW
Engine RPM	1600 (rpm)
Torque	-
Torque RPM	-
Fuel type	diesel
Fuel injection	-
Fuel tank size	12.7 gal or 48.1 L
Oil capacity	-
Oil change	-
Starter motor	-
Starter volts	12 V
Parts And Accessories	David Brown 25 Parts

Electrical and battery specs

Batteries number	-
Batteries voltage	-
Battries Amps	-
Cold Amps	-
Ground force	-
Charging system	generator
Charging Volts	-
Charging Amps	-

Clutch and gearbox specs

Trans system	-
Trans type	gear
Trans gears	6 forward and 2 reverse
Clutch system	dry plate

Cabine and mechanical specs

Wheel drive	4x2 2WD
Final drive	-
Steering	manual
Braking system	mechanical shoe
Cabin type	Open operator station
Differentiel lock	-

Hydraulics specifications

System	-
Valves	-
Pump flow	-
SVC flow	-
Steering flow	-
Tank capacity	-
Hydraulic pressure	-
Max flow	9.5 gpm or 36.0 lpm

Drawbar specifications

Drawbar type	-
Claimed power	22.7 hp or 16.9 kW
Drawbar horsepower	25.88 hp or 19.3 kW
Fuel consumption	-
Pulling power	3,269 lbs or 1482 kg

Power take-off (PTO) specs

Claimed power	-
Real power	-
Engine @RPM	-
PTO Clutch	-
Rear PTO	-
Rear PTO RPM	540 (rpm)
Front PTO	-
Front PTO RPM	-
Mid PTO	-
Mid PTO RPM	-
Fuel consumption	-

3 point hitch specifiations

Hitch system	-
Rear hitch	-
Rear hitch lift	1,300 lbs or 589 kg
Front hitch	-
Front hitch lift	-

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