Introduction
John Deere 840 Utility Tractor
The John Deere 840 is a utility tractor manufactured in Mannheim, Germany, between 1976 and 1986. It is designed for general agricultural applications, offering a balance of mechanical simplicity and operational versatility.
Engine and Power
The tractor is powered by a 2.9-liter, 3-cylinder liquid-cooled diesel engine. It utilizes a direct injection fuel system with a compression ratio of 16.8:1. The engine provides 37.5 horsepower (28.0 kW) and operates at a rated speed of 2400 RPM.
Transmission and Drivetrain
The 840 model features a two-wheel drive configuration. Two transmission options are available: an 8-speed collar shift transmission or a 16-speed two-speed power shift transmission. The system utilizes a dry disc clutch for manual gear engagement.
Hydraulics and Hitch
The tractor is equipped with a closed-center hydraulic system featuring a pump flow of 6.1 gpm (23.1 lpm) and a total hydraulic capacity of 10.8 gallons (40.9 liters). The rear hitch is a Category II/I type, capable of lifting up to 4,878 lbs (2,212 kg).
Dimensions and Mechanical Features
With a wheelbase of 74.4 inches (188 cm) and a shipping weight of 5,004 lbs (2,269 kg), the tractor is built for stability. It features hydraulic wet disc brakes and manual steering. The front axle clearance is 21 inches (53 cm), allowing for operation in various crop conditions.
Conclusion
The John Deere 840 is a robust utility tractor suited for light-to-medium agricultural tasks such as mowing, hauling, and tillage. Its German engineering and mechanical reliability make it a functional choice for farmers and collectors seeking a durable machine from the late 1970s and early 1980s.
John Deere 840 Manuals & Documentation
Download the manuals and documentation available for the John Deere 840: repair and workshop manuals, operator's handbooks, spare-parts catalogs and technical leaflets — free PDF files.
Archive documentation provided for reference, hosted by Tractor-Info.
Production Information of John Deere, 840
- Utility tractor
- Built in Mannheim, Baden-Württemberg, Germany
| Manufacturer | John Deere |
|---|
Dimension and Tires Information of John Deere, 840
| Clearance (front axle) | 21 inches [53 cm] |
|---|---|
| Wheelbase | 74.4 inches [188 cm] |
| Height (exhaust) | 103.1 inches [261 cm] |
| Height (ROPS) | 94.1 inches [239 cm] |
| Length | 138 inches [350 cm] |
| Front tread | 49.6 to 79.5 inches [125 to 201 cm] |
| Shipping weight | 5004 lbs [2269 kg] |
| Width | 65.4 inches [166 cm] |
| Rear tread | 53.5 to 73.2 inches [135 to 185 cm] |
| Ag front | 6.50-16 |
|---|---|
| Ag front(optional) | 12.4-28 |
| Ag rear | 12.4-32 |
| Ag rear | 9.5-36 |
Engine Specifications of John Deere, 840
- John Deere
- Liquid-cooled
- Diesel
- 3-cylinder
| Coolant capacity | 11.1 qts [10.5 L] |
|---|---|
| Fuel system | Direct injection |
| Compression | 16.8:1 |
| Operating RPM | 1300-2400 |
| Rated RPM | 2400 |
| Displacement | 179 ci [2.9 L] |
| Power | 37.5 hp [28.0 kW] |
| Bore/Stroke | 4.19x4.33 inches [106 x 110 mm] |
| Oil capacity | 7.4 qts [7.0 L] |
| Starter power | 4 hp [3.0 kW] |
| Starter volts | 12 |
Transmission Information of John Deere, 840
Transmission variants 1
| Type | Collar shift |
|---|---|
| Gears | 8 forward and 4 reverse |
| Clutch | Dry disc |
Transmission variants 2
| Type | Two-speed power shift |
|---|---|
| Gears | 16 forward and 8 reverse |
- 8-speed collar shift
- 16-speed two-speed power shift
Mechanical Specs of John Deere, 840
- Two-wheel drive
- Four-post ROPS.
- Hydraulic wet disc brakes
- Manual steering
| Final drives | Planetary |
|---|
Power Information of John Deere, 840
| Front PTO | Optional |
|---|---|
| Rear PTO | Live |
| Rear PTO Type | 540 |
| Rear PTO Type(optional) | Wet disc |
| Rear PTO Type(optional) | Independent |
| Front PTO Type | 1000 |
| Engine RPM | 540@2400 |
| Clutch | Dry disc |
| Engine RPM | 1000@2070 |
Optional, independent PTO
Hydraulics Specifications of John Deere, 840
| Type | Closed center |
|---|---|
| Capacity | 10.8 gal [40.9 L] |
| Pump flow | 6.1 gpm [23.1 lpm] |
Three-Point Hitch of John Deere, 840
| Rear Type | II/I |
|---|---|
| Rear lift | 4878 lbs [2212 kg] |
Electrical System of John Deere, 840
| Ground | Negative |
|---|---|
| Battery volts | 12 |
| Batteries | 2 |
| Charging system | Alternator |
| Charging amps | 33 |
Where it sits
With 37 HP, the John Deere 840 sits just below 940 (42 HP) in John Deere's range. Its power puts it in the 22th percentile of 1970s models in our database (1259 machines).
Frequently asked questions
How much horsepower does the John Deere 840 have?
The John Deere 840 delivers 37 HP.
What years was the John Deere 840 produced?
The John Deere 840 was produced in 1976-1986.
What engine does the John Deere 840 have?
The John Deere 840 is powered by a Diesel, 3-cylinder engine.
What transmission does the John Deere 840 use?
The John Deere 840 uses a Collar shift transmission.
How much does the John Deere 840 weigh?
The John Deere 840 weighs 5004 lbs [2269 kg].
Is the John Deere 840 4WD?
The John Deere 840 is available in 2WD.