John Deere 8640 Specs ( 1979-1982 )
Production
| Description | Built in Waterloo, Iowa, USA / Original price was $80,000 in 1982 |
|---|---|
| Drive type | Four-wheel Drive (4WD) tractor |
| Manufacturer | John Deere |
Engine
| Engine type | John Deere 10.1L 6-cyl diesel |
|---|---|
| Air cleaner | dual paper elements |
| Bore/Stroke | 5.12x5.00 inches (130 x 127 mm) |
| Compression | 15.2:1 |
| Coolant capacity | 48 qts (45.4 L) |
| Description | John Deere / turbocharged diesel / 6-cylinder / liquid-cooled |
| Displacement | 619 ci (10.1 L) |
| Idle RPM | 800-2300 |
| Oil capacity | 26 qts (24.6 L) |
| Operating RPM | 1500-2100 |
| Power | 275 hp (205.1 kW) |
| Rated RPM | 2100 |
| Starter volts | 12 |
| Drawbar (tested) | 203.34 hp (151.6 kW) |
| PTO (claimed) | 225 hp (167.8 kW) |
| PTO (tested) | 228.75 hp (170.6 kW) |
Transmission
| Clutch | hydraulic wet disc |
|---|---|
| Description | 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. |
| Gears | 16 forward and 6 reverse |
| Oil capacity | 164 qts (155.2 L) |
| Transmission | John Deere Quad-Range |
| Transmission type | 16-speed partial power shift |
| Type | partial power shift |
Mechanical
| Cab | Cab standard |
|---|---|
| Description | Articulated power steering / Hydraulic wet disc brakes |
| Differential lock | hydraulic front and rear |
| Drive type | Four-wheel drive |
Capacity
| Fuel | 214 gal (810.0 L) |
|---|---|
| Hydraulic system | 41 gal (155.2 L) |
Hydraulics
| Capacity | 41 gal (155.2 L) |
|---|---|
| Pump flow | 33 gpm (124.9 lpm) |
| Type | closed center |
| Valves | 2 |
Hitch
| Rear lift | 8545 lbs (3876 kg) |
|---|---|
| Rear Type | III/IIIN |
PTO
| Engine RPM | 1000@2100 |
|---|---|
| Rear PTO | independent |
| Rear PTO Type | 1000 |
Electrical
| Batteries | 2 |
|---|---|
| Battery CCA | 975 |
| Battery volts | 6 |
| Charging amps | 90 |
| Charging system | alternator |
| Ground | negative |
Dimensions & Tires
| Front axle | Rack-and-pinion: 3.937 by 95.8 inches (99 by 2433 mm) / Rack-and-pinion: 3.937 by 118.4 inches (99 by 3007 mm) |
|---|---|
| Front tread | 63 to 130 inches (160 to 330 cm) |
| Ground clearance | 18.4 inches (46 cm) |
| Length | 223.5 inches (567 cm) |
| Operating weight | 28,270 lbs (12823 kg) |
| Rack-and-pinion rear axle | 3.937 by 95.8 inches (99 by 2433 mm) / 3.937 by 118.4 inches (99 by 3007 mm) |
| Rear tread | 63 to 130 inches (160 to 330 cm) |
| Wheelbase | 125 inches (317 cm) |
| Front tire | 18.4-34 |
| Rear tire | 18.4-34 |
| Weight | 28,270 lbs (12823 kg) |
| Wheelbase | 125 inches (317 cm) |
| Ag front | 18.4-34 |
| Ag rear | 18.4-34 |
8640 Serial Number Location
| Description | On transmission case on the rear of the 8640. |
|---|
8640 Serial Numbers
| 1979 | 1500 |
|---|---|
| 1980 | 3198 |
| 1981 | 5704 |
| 1982 | 7960 |
| Description | FAQ: How to read a serial number table. |
John Deere 8640 Height
| Cab | 126.6 inches (321 cm) |
|---|---|
| Exhaust | 134.5 inches (341 cm) |
| Hood | 87.1 inches (221 cm) |
Nebraska Tractor Test 1324
| Description | Diesel 16-speed 4WDSeptember 11 - 18, 1979Link: Nebraska Tractor Test 1324 file / PTO performance / Drawbar performance |
|---|---|
| Fuel use | 14.7 gal/hour (55.6 l/hour) / 14.5 gal/hour (54.9 l/hour) |
| Max power | 203.34 hp (151.6 kW) |
| Max pull | 27,782 lbs (12601 kg) |
| Power at rated engine speed | 228.75 hp (170.6 kW) |
References
| Description | Explore Discover Deere '79 published in 1979, by John Deere / Move up to John Deere... published in 1981 |
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Speeds
| Description | With 18.4-38 tires. |
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