Introduction
John Deere 790 Compact Utility Tractor
The John Deere 790 is a compact utility tractor produced between 2000 and 2007. Manufactured in Japan, this model belongs to the company's line of small-frame utility machines, designed for versatile use in agricultural, landscaping, and property maintenance applications.
Engine and Performance
The tractor is powered by a liquid-cooled Yanmar 3TNE84 three-cylinder diesel engine. With a displacement of 91.3 cubic inches (1.5 liters), it produces a gross power output of 30 horsepower (22.4 kW) at a rated engine speed of 2600 RPM. The engine utilizes a dry-type air cleaner and operates with an 18:1 compression ratio.
Transmission and Drivetrain
The 790 features an unsynchronized gear transmission providing 8 forward and 2 reverse speeds. Operation requires the use of a clutch, a gear selection lever, and a range selection lever. The tractor is available in either two-wheel drive or four-wheel drive configurations. 4WD models are equipped with hydrostatic power steering for improved maneuverability, while 2WD versions utilize manual steering.
Hydraulics and PTO
The hydraulic system is of the open-center type, delivering a total pump flow of 5.4 gpm (20.4 lpm) at a pressure of 2050 psi (141.3 bar). The rear Power Take-Off (PTO) is a live, two-stage clutch system operating at 540 RPM. A mid-PTO rated at 2100 RPM is also available. The three-point hitch (Category I) provides a lift capacity of 815 lbs (369 kg) measured at 24 inches behind the lift points.
Dimensions and Chassis
Built on a 60.4-inch wheelbase, the tractor has an overall length of 87.8 inches. The height to the top of the ROPS (Roll-Over Protective Structure) is 82 inches. Depending on the drivetrain configuration, the weight varies: the 2WD model weighs approximately 1,930 lbs (875 kg), while the 4WD model weighs 2,105 lbs (954 kg).
Conclusion
The John Deere 790 is a mechanical, straightforward compact tractor suited for small-scale agricultural tasks, property maintenance, and light utility work. Its reliance on a manual transmission and a proven Yanmar engine makes it a durable choice for operators seeking a simple, reliable machine without complex electronic systems.
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Production Information of John Deere, 790
- Built in Japan
- Compact Utility tractor
| Distributor | John Deere |
|---|---|
| Manufacturer | Yanmar |
Dimension and Tires Information of John Deere, 790
| 4WD Weight | 2,105 lbs [954 kg] |
|---|---|
| Wheelbase | 60.4 inches [153 cm] |
| Height (ROPS) | 82 inches [208 cm] |
| Height (hood) | 51.2 inches [130 cm] |
| Length | 87.8 inches [223 cm] |
| 2WD Weight | 1,930 lbs [875 kg] |
| 2WD Weight(optional) | 111 inches (with 3-point) [281 cm] |
| Lawn/turf rear | 13.6-16 |
|---|---|
| Ag front | 6.00-12 (early) |
| Ag front(optional) | 11.2-24 |
| Ag rear | 12.4-16 (early) |
| 2WD Ag front | 5.00-15 |
| Industrial front | 25x8.50-14 |
| Lawn/turf front | 25x8.50-14 |
| 4WD Ag front | 7.00-14 |
| Industrial rear | 15.0-19.6 |
Engine Specifications of John Deere, 790
- Yanmar 3TNE84
- The 91 cubic inch engine was used through serial number 592445.
- Liquid-cooled
- Diesel
- 3-cylinder
| Rated RPM | 2600 |
|---|---|
| Power (gross) | 30 hp [22.4 kW] |
| Displacement | 91.3 ci [1.5 L] |
| Oil capacity | 4.2 qts [4.0 L] |
| Starter volts | 12 |
| Compression | 18:1 |
| Air cleaner | Dry |
| Bore/Stroke | 3.31x3.54 inches [84 x 90 mm] |
Transmission Information of John Deere, 790
Transmission variants 1
- Transmission operated with gear shift lever, range shift lever, and clutch. Gear shift lever selects one of four gears or reverse. Range shift lever selects high or low range. Tractor must be stopped, and clutch used, to shift gear or range.
| Type | Unsynchronized |
|---|---|
| Type(optional) | Low Viscosity HY-Gard |
| Oil type | Low Viscosity HY-Gard |
| Gears | 8 forward and 2 reverse |
| Oil capacity | 16 qts [15.1 L] |
Mechanical Specs of John Deere, 790
- Two- or four-wheel drive
- ROPS
- Independent dry shoe brakes
| 2WD Steering | Manual |
|---|---|
| 4WD Steering | Hydrostatic power |
Power Information of John Deere, 790
| Rear PTO | Transmission |
|---|---|
| Mid PTO Type | 2100 |
| Mid PTO Type(optional) | Live (two-stage clutch) |
| Rear PTO Type | 540 |
Hydraulics Specifications of John Deere, 790
| Type | Open center |
|---|---|
| Steering flow | 4.2 gpm [15.9 lpm] |
| Pump flow | 5.4 gpm [20.4 lpm] |
| Capacity | 4 gal [15.1 L] |
| Steering press. | 2050 psi [141.3 bar] |
| Pressure | 2050 psi [141.3 bar] |
Three-Point Hitch of John Deere, 790
| Rear Type | I |
|---|---|
| Rear lift (at 24"/610mm) | 815 lbs [369 kg] |
Electrical System of John Deere, 790
| Ground | Negative |
|---|---|
| Battery volts | 12 |
| Battery CCA | 500 |
| Charging system | Alternator |
| Battery Group | 45 |
| Charging amps | 20 |
Where it sits
With 30 HP, the John Deere 790 sits between 3005 (27 HP) and 990 (40 HP) in John Deere's range. Its power puts it in the 17th percentile of 2000s models in our database (2822 machines).
Frequently asked questions
How much horsepower does the John Deere 790 have?
The John Deere 790 delivers 30 HP.
What years was the John Deere 790 produced?
The John Deere 790 was produced in 2000-2007.
What engine does the John Deere 790 have?
The John Deere 790 is powered by a Diesel, 3-cylinder engine.
What transmission does the John Deere 790 use?
The John Deere 790 uses a Unsynchronized transmission.
How much does the John Deere 790 weigh?
The John Deere 790 weighs 2,105 lbs [954 kg].
Is the John Deere 790 4WD?
The John Deere 790 is available in 2WD/4WD.