| Manufacturer | John Deere |
| Price | 84,000(USD) |
| Model | 7800 |
| Equipment Type | Row-Crop Tractors |
| Factory | Waterloo, Iowa, USA |
OCED TRACTOR TEST 1668 2
| Description | Diesel PowrQuad 4WD May 19 - June 4, 1993 Link: OCED Tractor Test 1668 file PTO performance Drawbar performance |
| Max power | 131.99hp / 98.4kW |
| Fuel use | 8.7gal/hour / 32.9l/hour |
| Power at rated engine speed | 147.08hp / 109.7kW |
| Max pull | 19,052lbs / 8641kg |
OCED TRACTOR TEST 1669 2
| Description | Diesel power shift 4WD May 6 - July 19, 1993 Link: OCED Tractor Test 1669 file PTO performance Drawbar performance Gear 9 used for power test Gear 5 used for pull test |
| Max power | 124.12hp / 92.6kW |
| Fuel use | 8.5gal/hour / 32.2l/hour |
| Power at rated engine speed | 146.73hp / 109.4kW |
| Max pull | 18,921lbs / 8582kg |
JOHN DEERE 7800 POWER
| Engine (net) | 170hp / 126.8kW |
| PTO (claimed) | 145hp / 108.1kW |
| Drawbar (tested) | 131.99hp / 98.4kW |
| PTO (tested) | 158.97hp / 118.5kW |
ENGINE DETAIL
The John Deere 7800 features a robust 7.6L turbocharged 6-cylinder diesel engine, delivering 170hp at a moderate 2100 RPM, ideal for tasks requiring consistent power with efficient fuel usage. Its dual dry air cleaner enhances engine longevity by ensuring optimal air filtration, though regular maintenance is crucial to prevent performance degradation. With a 15.5:1 compression ratio, it demonstrates strong torque capabilities, but operators should be mindful of the coolant capacity of 27.5 quarts to avoid overheating during extended use.
| Description | John Deere turbocharged diesel 6-cylinder liquid-cooled |
| Displacement | 466ci / 7.6L |
| Bore/Stroke | 4.5625x4.75inches / 116x 121mm |
| Rated Power (ECE R24) | 170hp / 126.8kW |
| Air cleaner | dual dry element |
| Compression | 15.5:1 |
| Rated RPM | 2100 |
| Firing order | 1-5-3-6-2-4 |
| Starter volts | 12 |
| Coolant capacity | 27.5qts / 26.0L |
JOHN DEERE 7800 ENGINE
The John Deere 7800 features a robust 7.6L 6-cylinder diesel engine, providing high torque for demanding agricultural tasks. Key advantages include fuel efficiency and reliability, making it suitable for both field work and hauling. However, its size may present maneuverability challenges in smaller spaces, necessitating careful operation in confined areas.
| Description | John Deere 7.6L 6-cyl diesel |
TRANSMISSIONS OVERVIEW
The John Deere 7800 tractor features a 16-speed partial power shift transmission, which offers a balance between smooth gear transitions and operator control, ideal for varied field operations. Alternatively, the 19-speed full power shift provides seamless shifting without interrupting power delivery, enhancing productivity in demanding tasks like heavy tillage or transport. When choosing between the two, consider the operational demands: the full power shift may yield better efficiency in larger-scale farming operations.
| Description | 16-speed partial power shift 19-speed full power shift |
TRANSMISSION 1
The John Deere 7800's PowrQuad transmission offers a versatile partial power shift system with 16 forward and 12 reverse gears, facilitating improved control across various speeds and terrains. The wet disc clutch enhances durability and smooth engagement, which is advantageous for tasks requiring frequent shifting. However, users should be cautious of maintenance needs due to the complexity of the transmission, particularly in demanding agricultural conditions.
| Transmission | John Deere PowrQuad |
| Type | partial power shift |
| Gears | 16 forward and 12 reverse |
| Clutch | wet disc |
| Description | The PowrQuad was the standard transmission on the Deere 7800. It consists of four speeds (1-4) in four ranges (A-D) |
TRANSMISSION 2
The John Deere 7800 features a John Deere PowerShift transmission, offering smooth gear transitions with 19 forward and 7 reverse gears, which enhances operational flexibility for varied agricultural tasks. The wet disc clutch provides efficient power transfer and reduced wear, making it suitable for heavy-duty operations in challenging conditions. However, users should be aware of potential maintenance needs associated with the hydraulic systems that drive the PowerShift transmission.
| Transmission | John Deere PowerShift |
| Type | full power shift |
| Gears | 19 forward and 7 reverse |
| Clutch | wet disc |
MECHANICAL
The John Deere 7800 features a versatile 4x4 MFWD option, enhancing traction in adverse conditions, while the inboard planetary final drives provide consistent power transfer and stability. The electro-hydraulic rear differential lock optimizes traction and maneuverability, particularly in heavy-duty applications. With a 16-speed partial and 19-speed full power shift transmission, operators can efficiently manage speed and torque, making it suitable for various tasks from fieldwork to transport.
| Chassis | 4x2 2WD/4x4 MFWD 4WD |
| Final drives | inboard planetary |
| Differential lock | electro-hydraulic rear |
| Steering | power |
| Brakes | differential hydraulic wet disc |
| Cab | ComfortGard cab standard with air-conditioning |
| Transmissions | 16-speed partial power shift 19-speed full power shift |
CAPACITY
| Fuel | 91gal / 344.4L |
| Hydraulic system | 22.9gal / 86.7L |
HYDRAULICS
| Type | closed center |
| Capacity | 22.9gal / 86.7L |
| Pressure | 2900psi / 200.0bar |
| Valves | 2 to 3 |
| SCV flow | 25.4gpm / 96.1lpm |
TRACTOR HITCH
| Rear Type | IIIN/II |
| Control | position and draft control |
| Rear lift | 8925lbs / 4048kg 10050lbs / 4558kg with four-wheel drive |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540/1000 |
DIMENSIONS
| 2WD Wheelbase | 114.4inches / 290cm |
| 4WD Wheelbase | 110.2inches / 279cm |
| Length | 187.2inches / 475cm |
| Height (cab) | 118.4inches / 300cm |
| Shiping weight | 13,910lbs / 6309kg |
| Operating weight | 15,560lbs / 7058kg (4WD) |
| Rear axle | Rack-and-pinion: 3.62 by 118inches / 91by 2997mm |
| Rear tread | 60 to 108.3inches / 152to 275cm |
DIMENSIONS & TIRES
The John Deere 7800 tractor, with a wheelbase of 114.4 inches for 2WD and 110.2 inches for 4WD, provides stability, with the 4WD option enhancing traction in challenging terrains. Weighing between 13,910 to 15,560 pounds, it offers substantial low-end power but may face limitations in extreme conditions due to its weight distribution. Ideal for various farming operations, its choice between 2WD and 4WD should be based on soil conditions and intended task complexity.
| 2WD Wheelbase | 114.4inches / 290cm |
| 4WD Wheelbase | 110.2inches / 279cm |
| Weight | 13910 to 15560 pounds |
JOHN DEERE 725 LOADER
| Height (to pin) | 162inches / 411cm |
| Rollback angle | 12° |
| Breakout force (lift) | 6209lbs / 2816kg |
| Lift to full height (at pin) | 4677lbs / 2121kg |
JOHN DEERE 740 LOADER
| Height (to pin) | 164inches / 416cm |
| Rollback angle | 19° |
| Breakout force (lift) | 6021lbs / 2731kg |
| Lift to full height (at pin) | 3965lbs / 1798kg |
7800 SERIAL NUMBERS
| Location | Serial number tag on the right side of the 7800 tractor frame, above the front axle |
| 1993 | 2329 |
| 1994 | 5701 |
| 1995 | 10495 |
| 1996 | 15001 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 140 |
| Battery volts | 12 |