| Manufacturer | John Deere |
| Price | - |
| Model | 790 |
| Equipment Type | Compact Utility Tractors |
| Factory | Yanmar |
ENGINE DETAIL
The John Deere 790 tractor is powered by a Yanmar 3TNE84 diesel engine, offering a compact yet efficient 30 hp at 2600 RPM with a compression ratio of 18:1, which can enhance fuel efficiency and power output. Key advantages include its dry air cleaner and manageable oil capacity of 4.2 quarts, facilitating easier maintenance. However, its limited power output may restrict its suitability for heavy-duty tasks, making it ideal for smaller agricultural applications or landscaping rather than larger farming operations.
| Description | Yanmar 3TNE84 diesel 3-cylinder liquid-cooled, The 91 cubic inch engine was used through serial number 592445 |
| Displacemen | 91.3ci / 1.5L |
| Bore/Strok | 3.3x3.5inches / 84x 89mm |
| Power (gross | 30hp / 22.4kW |
| Air cleane | dry |
| Compressio | 18:1 |
| Rated RP | 2600 |
| Starter volt | 12 |
| Oil capacit | 4.2qts / 4.0L |
JOHN DEERE 790 ENGINE
The John Deere 790 features a Yanmar 1.5L 3-cylinder diesel engine, which delivers reliable torque and fuel efficiency ideal for light to moderate agricultural tasks. Advantages include its compact size for maneuverability in tight spaces, while the engine's lower displacement may limit power compared to larger models, posing challenges for heavy-duty applications. Consider using the 790 for landscaping, small farm operations, or as a utility tractor to maximize its strengths in efficiency and versatility.
| Description | Yanmar 1.5L 3-cyl diesel |
TRANSMISSION
The John Deere 790 features an unsynchronized transmission with 8 forward and 2 reverse gears, offering a practical range for varied agricultural tasks. With a 16-quart (15.1L) Low Viscosity HY-Gard oil capacity, it ensures proper lubrication and efficient operation, though the requirement to stop and engage the clutch for gear shifting may limit operational efficiency during multitasking. This tractor is best suited for tasks requiring consistent speed control, but operators should be prepared for potential downtime when changing gears or ranges.
| Typ | unsynchronized |
| Gear | 8 forward and 2 reverse |
| Oil capacit | 16qts / 15.1L Low Viscosity HY-Gard |
| Description | 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 |
SPEEDS
| Description | With 11.2-24 rear tires |
JOHN DEERE 790 TRANSMISSION
The John Deere 790 tractor features an 8-speed unsynchronized transmission, allowing for straightforward gear shifting but potentially requiring more skill during operation, especially under load. This transmission type may limit the operator's ability to shift seamlessly between gears, which can be a disadvantage in applications demanding constant speed adjustments. However, its simplicity makes it easier to maintain and a suitable choice for basic farming tasks or utility applications.
| Description | 8-speed unsynchronized |
MECHANICAL
The John Deere 790 tractor offers both two-wheel and four-wheel drive options, enhancing traction and stability in various terrains. Its independent dry shoe brakes provide reliable stopping power, while the ROPS (Roll Over Protective Structure) ensures operator safety during operation. The manual steering in 2WD may require more effort, whereas the hydrostatic power steering in 4WD improves maneuverability, making it advantageous for loader work and tight spaces.
| Description | Two- or four-wheel drive Independent dry shoe brakes ROPS |
| 2WD Steerin | manual |
| 4WD Steerin | hydrostatic power |
CAPACITY
| Fue | 6.3gal / 23.8L |
| Hydraulic syste | 4gal / 15.1L |
| Front diff | 2.32qts / 2.2L |
HYDRAULICS
| Typ | open center |
| Capacit | 4gal / 15.1L |
| Pressur | 2050psi / 141.3bar |
| Pump flo | 5.4gpm / 20.4lpm |
| Steering flo | 4.2gpm / 15.9lpm |
| Steering press | 2050psi / 141.3bar |
TRACTOR HITCH
| Rear Typ | I |
| Rear lift (at 24 | 815lbs / 369kg |
POWER TAKE-OFF (PTO)
| Rear PT | transmission/live (two-stage clutch) |
| Rear RP | 540 |
| Mid RP | 2100 |
JOHN DEERE 790 TIRES
The John Deere 790 tractor is versatile with multiple tire configurations for agricultural, lawn/turf, and industrial applications, enhancing its adaptability across various terrains. The 4WD option with 7.00-14 front tires improves traction in challenging conditions, while 2WD present in earlier models with 5.00-15 tires may limit performance on uneven ground. It’s essential to select the appropriate tire type based on intended use, as agricultural tires (e.g., 12.4-16) offer better soil compaction and stability for fieldwork, whereas turf tires (e.g., 25x8.50-14) minimize grass damage on lawns.
| Ag fron | 6.00-12 (early) |
| 2WD Ag fron | 5.00-15 |
| 4WD Ag fron | 7.00-14 |
| Ag rea | 12.4-16 (early) / 11.2-24 |
| Lawn/turf fron | 25x8.50-14 |
| Lawn/turf rea | 13.6-16 |
| Industrial fron | 25x8.50-14 |
| Industrial rea | 15.0-19.6 |
DIMENSIONS & TIRES
The John Deere 790 tractor features a wheelbase of 60.4 inches, providing a stable platform for various agricultural tasks, ideal for navigating tight spaces. Weighing between 1930 to 2105 pounds enhances traction, though the weight may limit transportability; this is beneficial for heavier soil conditions. The specified tire sizes (front: 6.00-12, rear: 12.4-16) aid in optimizing flotation and reducing soil compaction, particularly important in sensitive terrains.
| Wheelbas | 60.4inches / 153cm |
| Weigh | 1930 to 2105 pounds |
| Front tir | 6.00-12 |
| Rear tir | 12.4-16 |
790 SERIAL NUMBERS
| 199 | LV0790G190001 |
| 200 | LV0790S190001 |
790 SERIAL LOCATION
| Description | Serial number plate on the rear of the tractor |
ELECTRICAL
| Groun | negative |
| Charging syste | alternator |
| Charging amp | 20 |
| Battery CC | 500 |
| Battery volt | 12 |
| Battery Grou | 45 |