John Deere 8640

The John Deere 8640 is a tractor produced by John Deere. It is equipped with a 619 ci 10.1 L engine. The rated power output is 275 hp 205.1 kW. Transmission: John Deere Quad-Range. Operating weight: 28,270 lbs 12823 kg.

Overview

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

Production
Manufacturer	John Deere
Four-wheel Drive (4WD) tractor
Built in Waterloo, Iowa, USA
Original price was $80,000 in 1982

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

John Deere 8640 Transmission
16-speed partial power shift
Transmission details ...

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
Performance test details ...

Mechanical
Four-wheel drive
Differential lock	hydraulic front and rear
Articulated power steering
Hydraulic wet disc brakes
Cab standard

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

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

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

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

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 ...

Electrical
Ground	negative
Charging system	alternator
Charging amps	90
Batteries	2
Battery CCA	975
Battery volts	6

References
Explore Discover Deere '79 published in 1979, by John Deere
Move up to John Deere... published in 1981

Engine

Engine Detail — 619 ci / 10.1 L Diesel

Manufacturer	John Deere
Configuration	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

Transmission

Transmission — John Deere Quad-Range

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.
With 18.4-38 tires.

Dimensions

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

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
Rack-and-pinion rear axle	3.937 by 95.8 inches 99 by 2433 mm
Rack-and-pinion rear axle	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
Hood	87.1 inches 221 cm
Cab	126.6 inches 321 cm
Exhaust	134.5 inches 341 cm

Tests

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