John Deere 8640

John Deere 8640The John Deere 8640 is a four-wheel drive tractor from the Iron Horses series. This tractor was manufactured by John Deere in Waterloo, Iowa, USA from 1979 to 1982. The John Deere 8640 is equipped with a 10.1 L (618.8 cu·in) six-cylinder diesel engine and a partial power shift transmission with 16 forward and 6 reverse gears and hydraulic wet disc clutch.

The JD 8640 four-wheel drive used the John Deere engine. It is a 10.1 L, 10,140 cm2, (618.8 cu·in) six-cylinder turbocharged diesel engine with 130.0 mm (5.12 in) of the cylinder bore and 127.0 mm (5 in) of the piston stroke. The compression ratio rating is 15.2:1. This engine produced 278.9 PS (205.1 kW; 275.0 HP) at 2,100 rpm of output power.

The John Deere 8640 is equipped with articulated power steering, hydraulic wet disc brakes, Cab (standard), and 810.0 liters (214 US gal.; 178.2 Imp. gal) fuel tank.

John Deere 8640 Specifications

General Specifications
ModelJohn Deere 8640
Length5,670 mm (223.2 in)
Height (cab)3,210 mm (126.4 in)
Wheel base3,170 mm (124.8 in)
Ground clearance460 mm (18.1 in)
Weight12,820 kg (28,263 lbs)
Fuel tank capacity810.0 liters (214 US gal.; 178.2 Imp. gal)
Cabin typeCab (standard)
Engine modelJohn Deere
Engine typeFour-stroke, liquid-cooled, inline
Fuel typeDiesel
Displacement10.1 L, 10,140 cm2, (618.8 cu·in)
Bore and stroke130.0 mm X 127.0 mm (5.12 in X 5 in)
Compression ratio15.2:1
Horsepower278.9 PS (205.1 kW; 275.0 HP) at 2,100 rpm
Oil capacity:24.6 L (26 US. qt, 21.6 Imp. qt.)
Coolant capacity:45.4 L (48 US. qt, 39.9 Imp. qt.)
Transmission and chassis
Chassis4×4 MFWD 4WD
Steering typeArticulated power
BrakesHydraulic wet disc
Differential lockHydraulic front and rear
Transmission modelJohn Deere Quad-Range
Transmission typePartial power shift with hydraulic wet disc clutch
Gears16 forward and 6 reverse
Speed Forward: 32.5 kmh (20.2 mph) Reverse: 21.7 kmh (13.5 mph)
Transmission oil capacity155.2 L (41 US. gal, 34.1 Imp. gal.)
Front tires Ag: 18.4-34
Rear tires Ag: 18.4-34
Three-Point Hitch
Control type
Lift capacity (at ends)3,875 kg (8,545 lbs)
PTO (Power take-off shaft)
Rear PTO typeIndependent
Rear PTO speed1000 rpm
Hydraulic system
Hydraulic typeClosed center
Hydraulic capacity155.2 L (41 US. gal, 34.1 Imp. gal.)
Pump flow33.0 gpm (124.9 lpm)
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