John Deere 8640 tractor specifications

1979 - 1982

1979 - 1982 Iron Horses SeriesFour-wheel Drive (4WD) tractor

Production

Production Manufacturer:John Deere
Type:Four-wheel Drive (4WD) tractor
Factory:Waterloo, Iowa, USA
Original price:$80,000 (1982 )

John Deere 8640 Power

John Deere 8640 Power Engine:275 hp
205.1 kW
PTO (claimed):225 hp
167.8 kW
Drawbar (tested):203.34 hp
151.6 kW
PTO (tested):228.75 hp
170.6 kW
power test details ...

1979 - 1982

Iron Horses Series

Four-wheel Drive (4WD) tractor

Nebraska Tractor Test 1324

Nebraska Tractor Test 1324
Diesel 16-speed 4WD September 11 - 18, 1979 Link: Nebraska Tractor Test 1324 file
PTO performance
Power at rated engine speed:	228.75 hp 170.6 kW
Fuel use:	14.7 gal/hour 55.6 l/hour
Drawbar performance
Max power:	203.34 hp 151.6 kW
Fuel use:	14.5 gal/hour 54.9 l/hour
Max pull:	27,782 lbs 12601 kg

John Deere 8640 Engine

John Deere 8640 Engine John Deere 10.1L 6-cyl diesel Engine details ...

1979 - 1982

Iron Horses Series

Four-wheel Drive (4WD) tractor

Engine Detail

Engine Detail
John Deere
turbocharged diesel
6-cylinder
liquid-cooled
Displacement:	619 ci 10.1 L
Bore/Stroke:	5.12x5.00 inches 130 x 127 mm
Power:	275 hp 205.1 kW
Air cleaner:	dual paper elements
Compression:	15.2:1
Rated RPM:	2100
Idle RPM:	800-2300
Operating RPM:	1500-2100
Starter volts:	12
Oil capacity:	26 qts 24.6 L
Coolant capacity:	48 qts 45.4 L

Mechanical

Mechanical Chassis:4x4 articulated 4WD
Differential lock:hydraulic front and rear
Steering:articulated power
Brakes:hydraulic wet disc
Cab:Cab standard
Transmission:16-speed partial power shift
Transmission details ...

1979 - 1982

Iron Horses Series

Four-wheel Drive (4WD) tractor

Transmission

Transmission
Transmission:	John Deere Quad-Range
Type:	partial power shift
Gears:	16 forward and 6 reverse
Clutch:	hydraulic wet disc
Oil capacity:	164 qts 155.2 L
Four gears (1-4) in four ranges (A-D). Tractor must be stopped to select range. Power shift between gears 1-2 and 3-4 within range.

Speeds

Speeds
With 18.4-38 tires.

Capacity

Capacity Fuel:214 gal
810.0 L
Hydraulic system:41 gal
155.2 L

Hydraulics

Hydraulics Type:closed center
Capacity:41 gal
155.2 L
Valves:2
Pump flow:33 gpm
124.9 lpm

Tractor hitch

Tractor hitch Rear Type:III/IIIN
Rear lift:8545 lbs
3876 kg

Power Take-off (PTO)

Power Take-off (PTO) Rear PTO:independent
Rear RPM:1000
Engine RPM:1000@2100

Dimensions & Tires

Dimensions & Tires Wheelbase:125 inches
317 cm
Weight:28,270 lbs
12823 kg
Front tire:18.4-34
Rear tire:18.4-34
Full dimensions and tires ...

1979 - 1982

Iron Horses Series

Four-wheel Drive (4WD) tractor

John Deere 8640 Tires

John Deere 8640 Tires
Ag front:	18.4-34
Ag rear:	18.4-34

Dimensions

Dimensions
Wheelbase:	125 inches 317 cm
Length:	223.5 inches 567 cm
Operating weight:	28,270 lbs 12823 kg
Ground clearance:	18.4 inches 46 cm
Front axle:	Rack-and-pinion: 3.937 by 95.8 inches 99 by 2433 mm
Front axle:	Rack-and-pinion: 3.937 by 118.4 inches 99 by 3007 mm
Rear axle:	Rack-and-pinion: 3.937 by 95.8 inches 99 by 2433 mm
Rear axle:	Rack-and-pinion: 3.937 by 118.4 inches 99 by 3007 mm
Front tread:	63 to 130 inches 160 to 330 cm
Rear tread:	63 to 130 inches 160 to 330 cm

John Deere 8640 Height

John Deere 8640 Height
Hood:	87.1 inches 221 cm
Cab:	126.6 inches 321 cm
Exhaust:	134.5 inches 341 cm

8640 Serial Numbers

8640 Serial Numbers Location:On the tractor transmission case, rear.
photo of 8640 serial number
1979:1500
1980:3198
1981:5704
1982:7960

how to read serial numbers...