| Manufacturer |
John Deere |
| Price |
- |
| Model |
1840 |
| Equipment Type |
Utility Tractors |
| Factory |
Mannheim, Baden-Württemberg, Germany |
JOHN DEERE 1840 POWER
| Engine (net) |
70hp / 52.2kW |
| PTO (claimed) |
60hp / 44.7kW |
ENGINE DETAIL
The John Deere 1840 features a robust 4-cylinder diesel engine with a displacement of 3.9L, offering a compression ratio of 16.8:1, which enhances fuel efficiency and torque output of 170 lb-ft at 1300 RPM. Ideal for agricultural tasks, its operational range of 1300-2500 RPM allows for versatility across various farming applications, although users should be mindful of maintaining valve clearances (0.014 inches intake and 0.018 inches exhaust) for optimal performance. The 12V starter system simplifies ignition, but operators should ensure battery reliability, especially in cold starts or demanding conditions.
| Description |
John Deere diesel 4-cylinder liquid-cooled |
| Displacement |
239ci / 3.9L |
| Bore/Stroke |
4.19x4.33inches / 106x 110mm |
| Compression |
16.8:1 |
| Rated RPM |
2500 |
| Idle RPM |
800-2660 |
| Operating RPM |
1300-2500 |
| Torque |
170lb-ft / 230.5Nm |
| Torque RPM |
1300 |
| Firing order |
1-3-4-2 |
| Starter volts |
12 |
| Intake valve clearance |
0.014inches / 0.356mm |
| Exhaust valve clearance |
0.018inches / 0.457mm |
JOHN DEERE 1840 ENGINE
The John Deere 1840 tractor is equipped with a reliable 3.9L 4-cylinder diesel engine that offers robust torque for various agricultural applications. A 25.1-gallon (95.0L) fuel tank provides extended operational time, reducing the need for frequent refueling during long hours in the field. However, users should be mindful of the engine's maintenance requirements and ensure proper fuel quality to avoid performance issues.
| Description |
John Deere 3.9L 4-cyl diesel |
| Fuel tank |
25.1gal / 95.0L |
TRANSMISSIONS OVERVIEW
The John Deere 1840 features an 8-speed unsynchronized gear, which can make shifting more challenging but allows for straightforward maintenance. The 16-speed partially synchronized gear option enhances operational flexibility and efficiency, particularly in varied field conditions. However, operators may need to acclimate to the transmission's nuances to maximize performance and leverage its full potential effectively.
| Description |
8-speed unsynchronized gear 8-speed partially synchronized 16-speed two-speed power shift |
TRANSMISSION 1
The John Deere 1840 tractor features an unsynchronized gear transmission with 8 forward and 4 reverse gears, allowing for versatile speed control suitable for various agricultural tasks. Its dry disc clutch system is reliable but may require more frequent adjustments compared to wet clutches, particularly under heavy load conditions. Ideal for small to medium-sized farms, this tractor offers a balance of power and maneuverability, facilitating tasks such as plowing and tilling in tight spaces.
| Type |
unsynchronized gear |
| Gears |
8 forward and 4 reverse |
| Clutch |
dry disc |
| Description |
Four gears in two ranges, plus reverse range |
SPEEDS
| Description |
With 15.5-38 rear tires |
TRANSMISSION 2
The John Deere 1840 tractor features a partially synchronized transmission with 8 forward and 4 reverse gears, allowing for versatility in various farming applications. The four synchronized gears in two ranges facilitate smoother shifting under load, improving operational efficiency. However, the complexity of synchronized transmission may require more maintenance and operator familiarity to maximize performance.
| Transmission |
Top-Shaft Synchronized |
| Type |
partially synchronized |
| Gears |
8 forward and 4 reverse |
| Description |
Four synchronized gears in two ranges, plus reverse range |
TRANSMISSION 3
The John Deere 1840 features a two-speed power shift transmission with 16 forward and 8 reverse gears, allowing for precise speed control and efficient operation across varying terrain. The Hi-Lo option enhances versatility, making it suitable for both heavy draft work and field operations. However, the complexity of the power shift system may result in higher maintenance requirements compared to simpler transmission types.
| Transmission |
Hi-Lo |
| Type |
two-speed power shift |
| Gears |
16 forward and 8 reverse |
MECHANICAL
The John Deere 1840 tractor features a versatile drivetrain with options for both 2WD and 4WD configurations, allowing adaptability for various terrain types. Its mechanical rear differential lock enhances traction in challenging conditions, although the open operator station may expose the user to adverse weather unless the optional cab is installed. The transmission options, including an 8-speed unsynchronized and a 16-speed two-speed power shift, provide flexibility in speed selection and efficiency, but may require operator skill for smooth gear transitions.
| Chassis |
4x2 2WD/4x4 MFWD 4WD |
| Final drives |
planetary |
| Differential lock |
mechanical rear |
| Steering |
power |
| Brakes |
wet disc |
| Cab |
Open operator station. Cab optional |
| Transmissions |
8-speed unsynchronized gear 8-speed partially synchronized 16-speed two-speed power shift |
HYDRAULICS
TRACTOR HITCH
| Rear Type |
II/I |
| Control |
position and draft control |
POWER TAKE-OFF (PTO)
| Rear PTO |
independent |
| Rear RPM |
540 (1.375) / 540/1000 (1.375) |
JOHN DEERE 1840 TIRES
The John Deere 1840 features agricultural tires with a front size of 7.50-16 and a rear size of 16.9-30, providing a balanced footprint for fieldwork. This configuration can enhance traction on softer soil while ensuring stability during operations. However, the narrow front tires may limit steering control in uneven terrain, which could be a consideration for rough landscapes or hilly fields.
| Ag front |
7.50-16 |
| Ag rear |
16.9-30 |
DIMENSIONS
| Wheelbase |
89.7inches / 227cm |
| Length |
147inches / 373cm |
| Height (hood) |
62inches / 157cm |
| Weight |
5476lbs / 2483kg |
DIMENSIONS & TIRES
The John Deere 1840 tractor features a wheelbase of 89.7 inches, providing stability for both field and transport applications, particularly in narrow row crop settings. Weighing 5,476 lbs, its substantial mass enhances traction but may pose challenges in softer terrains where soil compaction is a concern. The combination of 7.50-16 front and 15.5-38 rear tires maximizes ground grip, making it suitable for various field operations while potentially limiting maneuverability in tight spaces.
| Wheelbase |
89.7inches / 227cm |
| Weight |
5476lbs / 2483kg |
| Front tire |
7.50-16 |
| Rear tire |
15.5-38 |
ELECTRICAL
| Ground |
negative |
| Charging system |
alternator |
| Charging amps |
33/55*Standard with cab, optional on open station |
| Charging volts |
14 |
| Batteries |
2 |
| Battery volts |
12 |
