| Manufacturer | John Deere |
| Price | 17,000(USD) |
| Model | 2840 |
| Equipment Type | Utility Tractors |
| Factory | Mannheim, Baden-Württemberg, Germany |
NEBRASKA TRACTOR TEST 1249 2
| Description | Diesel 12-speed 2WD June 14 - 30, 1977 Link: Nebraska Tractor Test 1249 file PTO performance Drawbar performance Gear 4H used for power test Gear 2H used for pull test |
| Power at rated engine speed | 80.65hp / 60.1kW |
| Fuel use | 5.2gal/hour / 19.7l/hour |
| Power at rated PTO speed | 76.27hp / 56.9kW |
| Max power | 64.86hp / 48.4kW |
| Max pull | 8,386lbs / 3803kg |
JOHN DEERE 2840 POWER
| Drawbar (tested) | 64.86hp / 48.4kW |
| PTO (tested) | 80.65hp / 60.1kW |
ENGINE DETAIL
The John Deere 2840 features a robust 6-cylinder diesel engine with a displacement of 5.4L and a high compression ratio of 17.0:1, providing enhanced torque and fuel efficiency at its rated RPM of 2500. The paper air cleaner ensures efficient filtration, contributing to engine longevity, while a coolant capacity of 5 quarts (4.7L) helps maintain optimal operating temperatures, crucial for heavy-duty applications. Expect consistent performance in agricultural tasks; however, monitoring coolant levels is essential to prevent overheating under heavy load conditions.
| Description | John Deere diesel 6-cylinder liquid-cooled |
| Displacement | 329ci / 5.4L |
| Bore/Stroke | 4.02x4.33inches / 102x 110mm |
| Air cleaner | paper elements |
| Compression | 17.0:1 |
| Rated RPM | 2500 |
| Starter volts | 12 |
| Coolant capacity | 5qts / 4.7L |
JOHN DEERE 2840 ENGINE
The John Deere 2840 features a robust 5.4L 6-cylinder diesel engine, known for its longevity and fuel efficiency, making it suitable for various agricultural applications. Its hydraulic system offers strong lifting capacity, enhancing its utility for heavy implements. However, the relatively compact size may limit its power for larger, more demanding tasks compared to newer models.
| Description | John Deere 5.4L 6-cyl diesel |
TRANSMISSIONS OVERVIEW
The John Deere 2840 features a 12-speed powershift transmission, allowing for smooth gear transitions and improved efficiency in field operations. Its two-speed power shift capability enhances operational flexibility, making it well-suited for a variety of tasks from tillage to transport. However, potential challenges may include increased maintenance complexity due to the advanced transmission system.
| Description | 12-speed two-speed power shift 6-speed |
TRANSMISSION 1
The John Deere 2840's two-speed power shift transmission offers 12 forward and 6 reverse gears, providing versatility in various field operations. The dry disc clutch enhances reliability but may require more maintenance than hydraulic systems, especially under heavy loads. Ideal for conditions requiring frequent speed adjustments, this transmission allows efficient navigation and operation in both tillage and transport scenarios.
| Transmission | Hi-Lo |
| Type | two-speed power shift |
| Gears | 12 forward and 6 reverse |
| Clutch | dry disc |
| Description | Three gears (1-3) in two ranges (I/II) plus reverse (R) range with a high/low power shift |
SPEEDS
| Description | With 18.4-34 rear tires |
TRANSMISSION 2
The John Deere 2840 features a sliding gear transmission with 6 forward and 3 reverse gears, providing versatility for various agricultural tasks. The gear selection allows for effective speed management and torque control, beneficial for both fieldwork and transportation. However, the sliding gear system may present challenges in high-stress situations, such as rapid gear changes under load, potentially leading to increased wear and maintenance requirements.
| Transmission | sliding gear |
| Gears | 6 forward and 3 reverse |
MECHANICAL
The John Deere 2840 features a 4x2 2WD chassis that offers less traction in challenging terrain compared to 4WD models, making it ideal for flat or light-duty conditions. Its mechanical rear differential lock enhances traction and control during fieldwork, while the power-assisted steering improves maneuverability. The 12-speed two-speed power shift transmission allows for efficient speed management, but may require more skill from the operator for optimal performance.
| Chassis | 4x2 2WD |
| Final drives | planetary |
| Differential lock | mechanical rear |
| Steering | power assist |
| Brakes | differential hydraulic wet disc |
| Cab | Open operator station. Two-post Roll-Gard ROPS optional |
| Transmissions | 12-speed two-speed power shift 6-speed |
CAPACITY
| Fuel | 28gal / 106.0L |
| Hydraulic system | 12.9gal / 48.8L |
HYDRAULICS
| Type | closed center |
| Capacity | 12.9gal / 48.8L |
| Valves | 2 |
| Pump flow | 23gpm / 87.1lpm |
TRACTOR HITCH
| Rear Type | II |
| Control | draft sensing |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Clutch | hydraulic 300mm disc |
| Rear RPM | 540/1000 |
JOHN DEERE 2840 TIRES
The John Deere 2840 features a versatile tire configuration with Ag front tires sized at 7.50-18 and rear options of 15.5-38 or 16.9-38, allowing for enhanced traction and stability in agricultural applications. The larger rear tires improve flotation and reduce soil compaction, crucial for working on varied terrains. However, potential challenges include limited maneuverability in tight spaces due to the increased width from larger rear tires.
| Ag front | 7.50-18 |
| Ag rear | 15.5-38/16.9-38 |
DIMENSIONS
| Wheelbase | 97inches / 246cm |
| Length | 160inches / 406cm |
| Width | 90inches / 228cm |
| Height (steering wheel) | 74inches / 187cm |
| Operating weight | 8700lbs / 3946kg |
| Ballasted weight | 10500lbs / 4762kg |
| Clearance (front axle) | 21inches / 53cm |
| Rear axle | Rack-and-pinion |
| Front tread | 69 to 94inches / 175to 238cm (wide axle) |
| Rear tread | 61 to 90inches / 154to 228cm *ROPS or fenders limit minimum tread to 68 inches |
DIMENSIONS & TIRES
The John Deere 2840 has a wheelbase of 97 inches, providing stability for field operations and reducing the risk of tipping during tasks such as plowing or hauling heavy loads. Weighing 8,700 lbs, its robust structure enhances traction but may limit maneuverability in tighter spaces. The rear tires (18.4-34) offer superior flotation and ground contact, making it effective on soft terrain, though the front tire size (7.50-18) could necessitate the use of front weights for better balance under heavy loads.
| Wheelbase | 97inches / 246cm |
| Weight | 8700lbs / 3946kg |
| Front tire | 7.50-18 |
| Rear tire | 18.4-34 |
JOHN DEERE 148 LOADER
| Loader weight | 1350lbs / 612kg |
| Height (to pin) | 126inches / 320cm |
| Clearance, dumped bucket | 102inches / 259cm |
| Dump reach | 32inches / 81cm |
| Dump angle | 38° |
| Clearance, level bucket | 121inches / 307cm |
| Rollback angle | 11° |
| Breakout force (lift) | 4700lbs / 2131kg |
| Lift to full height (at pin) | 3100lbs / 1406kg |
| Bucket capacity | 0.5cu yd / 0.4 cu m / 0.6cu yd / 0.5cu m / 0.8cu yd / 0.6cu m/ 0.9cu yd / 0.7cu m |
| Bucket width | 60inches / 152cm 72inches / 182cm 84inches / 213cm 96inches / 243cm |
2840 SERIAL NUMBERS
| Location | Serial number plate on the right side of the 2840 frame, above the front axle |
| 1977 | 214909 |
| 1978 | 264711 |
| 1979 | 304654 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Batteries | 2 |
| Battery volts | 12 |