John Deere 4840
Power
200 hp[P] hp
Production
1978-1982
Engine
Turbocharged intercooled diesel, 6-cylinder
Transmission
John Deere PowerShift
Drive
2WD
From the same series:
Introduction
John Deere 4840 Row-Crop Tractor
The John Deere 4840 is a high-horsepower row-crop tractor produced between 1978 and 1982 in Waterloo, Iowa. As a representative of the 40 series, it was engineered to provide significant pulling power and operational efficiency for large-scale agricultural tasks.
Engine and Performance
The tractor is powered by a 7.6-liter (466 cubic-inch) six-cylinder turbocharged and intercooled diesel engine. It features a liquid-cooled system and an ether injection pre-heating aid to facilitate cold-weather starting. The engine operates at a rated speed of 2200 RPM, delivering 200 horsepower.
Transmission and Drivetrain
It utilizes the John Deere PowerShift transmission, providing 8 forward and 4 reverse gears. This system allows for clutchless, on-the-move shifting between all gears. An inching pedal is included to assist with precise movements, such as hitching implements.
Hydraulics and PTO
The hydraulic system is of the closed-center type, featuring a pump flow capacity of 23 gpm (87.1 lpm) and supporting 2 or 3 valves. The rear PTO is an independent unit operating at 1000 RPM with a 1.75-inch shaft. The rear three-point hitch is rated for a lift capacity of 8,295 lbs (3,762 kg).
Operator Environment and Dimensions
The tractor is equipped with the Sound-Gard cab, designed to reduce noise and improve operator comfort. It features power steering and hydraulically actuated wet disc brakes with a pedal-operated differential lock. The wheelbase measures 118.5 inches (300 cm), providing a stable platform for heavy field operations.
Conclusion
The John Deere 4840 is a heavy-duty two-wheel drive tractor designed for demanding cultivation and traction requirements. Its combination of a high-capacity hydraulic system, power-shift transmission, and solid build quality makes it a versatile machine for large-acreage farming operations.
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Production Information of John Deere, 4840
- Original price was $57,648 in 1982
- Row-Crop tractor
- Built in Waterloo, Iowa, USA
| Manufacturer | John Deere |
|---|
Dimension and Tires Information of John Deere, 4840
| Wheelbase | 118.5 inches [300 cm] |
|---|---|
| Wheelbase(optional) | 108 inches (long axle) [274 cm] |
| Clearance (rear axle) | 28 inches [71 cm] |
| Width | 96 inches [243 cm] |
| Rack-and-pinion rear axle | 3.937 by 108 inches [99 by 2743 mm] |
| Length | 177 inches [449 cm] |
| Length(optional) | 118 inches (long axle) [299 cm] |
| Height (cab) | 117 inches [297 cm] |
| Clearance (front axle) | 26 inches [66 cm] |
| Rack-and-pinion rear axle | 3.937 by 96 inches [99 by 2438 mm] |
| Clearance (drawbar) | 14.9 inches [37 cm] |
| Rear tread | 60 to 131.5 inches [152 to 334 cm] |
| Front tread | 58 to 100 inches [147 to 254 cm] |
| Rack-and-pinion rear axle | 3.937 by 118 inches [99 by 2997 mm] |
| Ag rear | 24.5-32 |
|---|---|
| Ag front | 11.00-16 |
| Ag front(optional) | 16.5L-16.1 |
| Ag front(optional) | 14L-16.1 |
| Ag rear | 18.4-38 |
| Ag rear(optional) | 30.5-32 |
| Ag rear(optional) | 9.50-20 |
| Ag front | 10.00-16 |
| Ag front(optional) | 18.4-42 |
| Ag front(optional) | 20.8-38 |
Engine Specifications of John Deere, 4840
- John Deere
- Liquid-cooled
- Turbocharged intercooled diesel
- 6-cylinder
| Coolant capacity | 40 qts [37.9 L] |
|---|---|
| Pre-heating | Ether injection |
| Compression | 15.5:1 |
| Idle RPM | 800-2400 |
| Rated RPM | 2200 |
| Displacement | 466 ci [7.6 L] |
| Air cleaner | Dual paper elements |
| Bore/Stroke | 4.5625x4.75 inches [116 x 121 mm] |
| Starter volts | 12 |
| Firing order | 1-5-3-6-2-4 |
| Operating RPM | 1500-2200 |
Transmission Information of John Deere, 4840
Transmission variants 1
- 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.
| Transmission | John Deere PowerShift |
|---|---|
| Oil capacity | 80 qts [75.7 L] |
| Type | Full power shift |
| Gears | 8 forward and 4 reverse |
Mechanical Specs of John Deere, 4840
- Two-wheel drive
- Sound-Gard cab.
- Differential hydraulic wet disc brakes
- Power steering
| Differential lock | Pedal-actuated hydraulic |
|---|
Power Information of John Deere, 4840
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 1000 (1.75) |
Hydraulics Specifications of John Deere, 4840
| Type | Closed center |
|---|---|
| Pump flow | 23 gpm [87.1 lpm] |
| Capacity | 16.5 gal [62.5 L] |
| Valves | 2 or 3 |
Three-Point Hitch of John Deere, 4840
| Rear Type | III/IIIN |
|---|---|
| Rear lift | 8295 lbs [3762 kg] |
Electrical System of John Deere, 4840
| Ground | Negative |
|---|---|
| Battery volts | 6 |
| Charging system | Alternator |
| Batteries | 2 |
Where it sits
With 200 hp[P] HP, the John Deere 4840 sits between 4640 (172 HP) and 4850 (207 HP) in John Deere's range. Its power puts it in the 89th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the John Deere 4840 have?
The John Deere 4840 delivers 200 hp[P] HP.
What years was the John Deere 4840 produced?
The John Deere 4840 was produced in 1978-1982.
What engine does the John Deere 4840 have?
The John Deere 4840 is powered by a Turbocharged intercooled diesel, 6-cylinder engine.
What transmission does the John Deere 4840 use?
The John Deere 4840 uses a John Deere PowerShift transmission.
Is the John Deere 4840 4WD?
The John Deere 4840 is available in 2WD.