Introduction
John Deere 1840 Utility Tractor
The John Deere 1840 is a utility tractor produced between 1979 and 1982 at the John Deere manufacturing facility in Mannheim, Germany. Designed for general agricultural tasks, this model belongs to the 1640-2040 series and offers a balance of mechanical simplicity and operational versatility.
Engine and Performance
The tractor is powered by a 3.9-liter, 4-cylinder liquid-cooled diesel engine. It delivers a net power output of 70 hp (52.2 kW) at a rated speed of 2500 RPM. The engine features a compression ratio of 16.8:1 and generates 170 lb-ft (230.5 Nm) of torque at 1300 RPM, providing consistent lugging ability for varied field conditions.
Transmission and Drivetrain
Three transmission configurations were available: an 8-speed unsynchronized gear system, an 8-speed partially synchronized transmission, and a 16-speed Hi-Lo two-speed power shift transmission. These options allow for precise speed selection depending on the application. The machine is available in both two-wheel and four-wheel drive configurations.
Hydraulics and PTO
The 1840 utilizes a closed-center hydraulic system to power implements. The rear power take-off (PTO) is independent and offers dual speed capabilities of 540 and 1000 RPM, selectable via a 1.375-inch shaft. The rear three-point hitch supports Category I/II implements and includes both position and draft control for effective soil engagement.
Operator Environment and Mechanical Features
Standard equipment includes power steering, wet disc brakes for reliable stopping performance, and a mechanical rear differential lock to improve traction in slippery conditions. The operator station is of an open design, with an optional cab available for improved comfort during extended work hours.
Conclusion
With a base weight of 2,483 kg and a wheelbase of 227 cm, the John Deere 1840 is a stable and maneuverable utility tractor. Its range of transmission choices and reliable engine performance make it a suitable choice for mid-sized farming operations and general agricultural maintenance tasks.
Production Information of John Deere, 1840
- The Canadian-market 1840 is similar to the US 2440 model.
- Utility tractor
- Built in Mannheim, Baden-Württemberg, Germany
| Manufacturer | John Deere |
|---|
Dimension and Tires Information of John Deere, 1840
| Wheelbase | 89.7 inches [227 cm] |
|---|---|
| Weight | 5476 lbs [2483 kg] |
| Length | 147 inches [373 cm] |
| Height (hood) | 62 inches [157 cm] |
| Ag front | 7.50-16 |
|---|---|
| Ag rear | 15.5-38 |
| Ag rear | 16.9-30 |
Engine Specifications of John Deere, 1840
- John Deere
- Liquid-cooled
- Diesel
- 4-cylinder
| Intake valve clearance | 0.014 inches [0.356 mm] |
|---|---|
| Starter volts | 12 |
| Compression | 16.8:1 |
| Exhaust valve clearance | 0.018 inches [0.457 mm] |
| Idle RPM | 800-2660 |
| Operating RPM | 1300-2500 |
| Rated RPM | 2500 |
| Displacement | 239 ci [3.9 L] |
| Power (net) | 70 hp [52.2 kW] |
| Bore/Stroke | 4.19x4.33 inches [106 x 110 mm] |
| Firing order | 1-3-4-2 |
| Torque RPM | 1300 |
| Torque | 170 lb-ft [230.5 Nm] |
Transmission Information of John Deere, 1840
Transmission variants 1
- Four gears in two ranges, plus reverse range.
| Type | Unsynchronized gear |
|---|---|
| Gears | 8 forward and 4 reverse |
| Clutch | Dry disc |
Transmission variants 2
- Four synchronized gears in two ranges, plus reverse range.
| Transmission | Top-Shaft Synchronized |
|---|---|
| Type | Partially synchronized |
| Gears | 8 forward and 4 reverse |
Transmission variants 3
| Transmission | Hi-Lo |
|---|---|
| Type | Two-speed power shift |
| Gears | 16 forward and 8 reverse |
- 8-speed unsynchronized gear
- 8-speed partially synchronized
- 16-speed two-speed power shift
Mechanical Specs of John Deere, 1840
- Two- or four-wheel drive
- Wet disc brakes
- Power steering
- Open operator station. Cab optional.
| Final drives | Planetary |
|---|---|
| Differential lock | Mechanical rear |
Power Information of John Deere, 1840
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 540 (1.375) |
| Rear PTO Type(optional) | 540/1000 (1.375) |
Hydraulics Specifications of John Deere, 1840
| Type | Closed center |
|---|
Three-Point Hitch of John Deere, 1840
| Rear Type | II/I |
|---|---|
| Control | Position and draft control |
Electrical System of John Deere, 1840
| Battery volts | 12 |
|---|---|
| Ground | Negative |
| Charging volts | 14 |
| Charging volts(optional) | 55 |
| Charging system | Alternator |
| Batteries | 2 |
| Charging amps | 33 |
Standard with cab, optional on open station.
Where it sits
With 70 HP, the John Deere 1840 sits just above 1640 (62 HP) in John Deere's range. Its power puts it in the 51th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the John Deere 1840 have?
The John Deere 1840 delivers 70 HP.
What years was the John Deere 1840 produced?
The John Deere 1840 was produced in 1979-1982.
What engine does the John Deere 1840 have?
The John Deere 1840 is powered by a Diesel, 4-cylinder engine.
What transmission does the John Deere 1840 use?
The John Deere 1840 uses a Unsynchronized gear transmission.
How much does the John Deere 1840 weigh?
The John Deere 1840 weighs 5476 lbs [2483 kg].
Is the John Deere 1840 4WD?
The John Deere 1840 is available in 2WD/4WD.