John Deere 4840 Specs ( 1978-1982 )
Production
| Description | Row-Crop tractor / Built in Waterloo, Iowa, USA / Original price was $57,648 in 1982 |
|---|---|
| Manufacturer | John Deere |
Engine
| Engine type | John Deere 7.6L 6-cyl diesel |
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| Air cleaner | dual paper elements |
| Bore/Stroke | 4.5625x4.75 inches (116 x 121 mm) |
| Compression | 15.5:1 |
| Coolant capacity | 40 qts (37.9 L) |
| Description | John Deere / turbocharged intercooled diesel / 6-cylinder / liquid-cooled |
| Displacement | 466 ci (7.6 L) |
| Firing order | 1-5-3-6-2-4 |
| Idle RPM | 800-2400 |
| Operating RPM | 1500-2200 |
| Pre-heating | ether injection |
| Rated RPM | 2200 |
| Starter volts | 12 |
| Drawbar (claimed) | 157 hp (117.1 kW) |
| Drawbar (tested) | 151.21 hp (112.8 kW) |
| PTO (claimed) | 180 hp (134.2 kW) |
| PTO (tested) | 180.63 hp (134.7 kW) |
Transmission
| Description | Clutchless shift-on-the-move power shift between all eight forward and four reverse gears. Inching pedal provided for hooking up implements and other precision work. |
|---|---|
| Gears | 8 forward and 4 reverse |
| Oil capacity | 80 qts (75.7 L) |
| Transmission | John Deere PowerShift |
| Transmission type | 8-speed full power shift |
| Type | full power shift |
Mechanical
| Description | Power steering / Differential hydraulic wet disc brakes / Sound-Gard cab. |
|---|---|
| Differential lock | pedal-actuated hydraulic |
| Drive type | Two-wheel drive |
Capacity
| Fuel | 103 gal (389.9 L) |
|---|---|
| Hydraulic system | 16.5 gal (62.5 L) |
Hydraulics
| Capacity | 16.5 gal (62.5 L) |
|---|---|
| Pump flow | 23 gpm (87.1 lpm) |
| Type | closed center |
| Valves | 2 or 3 |
Hitch
| Rear lift | 8295 lbs (3762 kg) |
|---|---|
| Rear Type | III/IIIN |
PTO
| Rear PTO | independent |
|---|---|
| Rear PTO Type | 1000 (1.75) |
Electrical
| Batteries | 2 |
|---|---|
| Battery volts | 6 |
| Charging system | alternator |
| Ground | negative |
Dimensions & Tires
| Clearance (drawbar) | 14.9 inches (37 cm) |
|---|---|
| Clearance (front axle) | 26 inches (66 cm) |
| Clearance (rear axle) | 28 inches (71 cm) |
| Front tread | 58 to 100 inches (147 to 254 cm) |
| Height (cab) | 117 inches (297 cm) |
| Length | 177 inches (449 cm) |
| Rack-and-pinion rear axle | 3.937 by 96 inches (99 by 2438 mm) / 3.937 by 108 inches (99 by 2743 mm) / 3.937 by 118 inches (99 by 2997 mm) |
| Rear tread | 60 to 131.5 inches (152 to 334 cm) |
| Wheelbase | 118.5 inches (300 cm) |
| Width | 96 inches (243 cm) |
| Front tire | 11.00-16 |
| Rear tire | 18.4-38 |
| Weight | 14900 to 18000 pounds |
| Wheelbase | 118.5 inches (300 cm) |
| Ag front | 11.00-16 / 10.00-16 |
| Ag rear | 18.4-38 / 24.5-32 |
4840 Serial Number Location
| Description | Serial number plate on the rear of the 4840, above the PTO shaft. |
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4840 Serial Numbers
| 1978 | 1000 |
|---|---|
| 1979 | 4233 |
| 1980 | 7539 |
| 1981 | 11042 |
| 1982 | 14933 |
| Description | FAQ: How to read a serial number table. |
John Deere 4840 Weight
| Ballasted | 20,370 lbs (9239 kg) |
|---|---|
| Operating | 18,000 lbs (8164 kg) |
| Shipping | 14,900 lbs (6758 kg) |
Nebraska Tractor Test 1263
| Description | Diesel 8-speed 2WDNovember 2 - 12, 1977Link: Nebraska Tractor Test 1263 file / PTO performance / Drawbar performance / Gear 4 used for power test. / Gear 2 used for pull test. |
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| Fuel use | 11.5 gal/hour (43.5 l/hour) / 11.5 gal/hour (43.5 l/hour) / 11.3 gal/hour (42.8 l/hour) |
| Max power | 151.21 hp (112.8 kW) |
| Max pull | 17,307 lbs (7850 kg) |
| Power at rated engine speed | 180.63 hp (134.7 kW) |
| Power at rated PTO speed | 181.63 hp (135.4 kW) |
References
| Description | The New Iron Horses published in 1978, by John Deere / Tractors 90 to 180 HP published in 1979, by John Deere / Tractors 90, 110, 130, 155, 180 HP published in 1979, by John Deere / Row-Crop Tractors Product Information Handbook published in 1977, by John Deere / 40 Series Row-Crop Tractors Product Information Handbook published in 1982, by John Deere |
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