| Manufacturer | New Holland |
| Price | 35,650(USD) |
| Model | 7840 |
| Equipment Type | Row-Crop Tractors |
| Factory | Basildon, England |
VARIANTS
| 7840S | 8-speed economy |
| 7840SL | 12-speed |
| 7840SLE | 16-speed premium |
NEBRASKA TRACTOR TEST 163
| Description | Diesel 16-speed 4WD September 1992 - 1992, PTO performance Drawbar performance |
| Power at rated engine speed | 90.4hp / 67.4kW |
| Fuel use | 5.9gal/hour / 22.3l/hour |
| Max power | 75.2hp / 56.1kW |
NEW HOLLAND 7840 POWER
| PTO (claimed) | 90hp / 67.1kW |
| Drawbar (tested) | 75.2hp / 56.1kW |
| PTO (tested) | 90.4hp / 67.4kW |
ENGINE DETAIL
The New Holland 7840 features a robust Ford Genesis 6-cylinder diesel engine with a significant displacement of 6.6L, optimized for lower RPM operation (rated at 2100 RPM) which enhances fuel efficiency while providing ample torque for heavy-duty tasks. The engine's balanced bore and stroke (4.40 inches) yield effective power delivery, but the high compression ratio (17.5:1) may lead to challenges in cold starting and requires proper maintenance of valve clearances (0.016 inches for intake, 0.019 inches for exhaust) for optimal performance. With a coolant capacity of 21.1 quarts (20.0L), the tractor is well-equipped to handle prolonged operational periods while ensuring effective engine cooling, making it suitable for agricultural and demanding industrial applications.
| Description | Ford Genesis diesel 6-cylinder 12-valve liquid-cooled |
| Displacement | 401ci / 6.6L |
| Bore/Stroke | 4.40x4.40inches / 112x 112mm |
| Compression | 17.5:1 |
| Rated RPM | 2100 |
| Idle RPM | 725-2275 |
| Firing order | 1-5-3-6-2-4 |
| Starter volts | 12 |
| Coolant capacity | 21.1qts / 20.0L 22.7qts / 21.5L (cab) |
| Intake valve clearance | 0.016inches / 0.406mm (cold) |
| Exhaust valve clearance | 0.019inches / 0.483mm (cold) |
ENGINE OIL
The New Holland 7840 tractor has an oil capacity of 22.1 quarts (20.9 liters), which is important for maintaining optimal engine lubrication and performance. This relatively moderate capacity means regular monitoring and timely oil changes are crucial to prevent engine wear. In scenarios involving extended or heavy-duty operations, ensuring sufficient oil levels can enhance durability and efficiency.
| Oil capacity | 22.1qts / 20.9L |
NEW HOLLAND 7840 ENGINE
The New Holland 7840 tractor is powered by a robust Ford 6.6L 6-cylinder diesel engine, providing strong torque and better fuel efficiency for heavy-duty applications. With a substantial 57.5-gallon (217.6-liter) fuel tank, it enables prolonged operational hours without frequent refueling, making it ideal for large-scale farming or extensive fieldwork. However, the size and weight of the tractor may pose challenges in maneuverability on smaller plots or in tight spaces.
| Description | Ford 6.6L 6-cyl diesel |
| Fuel tank | 57.5gal / 217.6L |
TRANSMISSIONS OVERVIEW
The New Holland 7840 tractor features an 8-speed constant mesh transmission that provides reliable power delivery and ease of operation for general tasks. Its 16-speed two-speed power shift and 12-speed synchronized options offer versatile gearing for varying field conditions, enhancing productivity. The 16-speed four-speed power shift adds further flexibility, though its complexity may require more nuanced operator training to maximize performance.
| Description | 8-speed constant mesh 16-speed two-speed power shift 12-speed synchronized 16-speed four-speed power shift |
TRANSMISSION 1
The New Holland 7840's EconoShift transmission features a constant mesh design, optimizing gear engagement efficiency but requiring the tractor to be stationary for shifting, which can affect operational speed during fieldwork. With 8 forward and 2 reverse gears, plus an optional creeper for enhanced low-speed control, it caters well for applications requiring precise speed management. Its dry disc clutch is robust but may warrant more frequent maintenance compared to wet clutches, impacting long-term operational costs.
| Transmission | EconoShift |
| Type | constant mesh |
| Gears | 8 forward and 2 reverse |
| Clutch | dry disc |
| Oil capacity | 69.6qts / 65.9L |
| Description | Four gears (1-4), plus reverse, in two ranges (L/H). Optional creeper provided a third range. Tractor must be stopped and clutch used to shift gears or range. The eight-speed transmission was only used on the 7840S |
SPEEDS 1
| Description | With 16.9-34 rear tires |
TRANSMISSION 2
The New Holland 7840 features a dual power transmission that enhances operational flexibility with 16 forward and 4 reverse gears, allowing for efficient speed adjustment in various field conditions. The two-speed power shift provides seamless transitions between direct drive and a lower range, making it ideal for tasks requiring varied torque outputs. Potential challenges may include a steeper learning curve for operators unfamiliar with advanced transmission systems, but the benefits include improved fuel efficiency and greater productivity during intensive fieldwork.
| Transmission | Dual Power |
| Type | two-speed power shift |
| Gears | 16 forward and 4 reverse |
| Clutch | dry disc |
| Oil capacity | 69.6qts / 65.9L |
| Description | Dual Power adds a two-speed power shift between direct drive and the lower Dual Power range to the basic eight-speed transmission. The Dual Power range is engaged by a switch on the dashboard. Dual Power was an option on the 7840S |
SPEEDS 2
| Description | With 16.9-34 rear tires |
TRANSMISSION 3
The New Holland 7840 features a SynchroShift transmission with 12 synchronized gears in forward and reverse, offering smooth gear transitions ideal for various field operations. The necessity of stopping the tractor to shift between low and other ranges can hinder continuous workflow in some scenarios, while the optional dual power enhances versatility, effectively doubling gear options to 24 speeds. The dry disc clutch design contributes to durability, yet may require more maintenance compared to wet clutches under heavy use.
| Transmission | SynchroShift |
| Type | synchronized |
| Gears | 12 forward and reverse |
| Clutch | dry disc |
| Description | Four gears (1-4) in three ranges (L/M/H) with right-hand shuttle lever. Gear shifts are synchronized. Shifts between medium and high ranges are synchronized, but the tractor should be stopped to shift to or from low range. Sychronized shuttle shifting. The 12-speed SynchroShift was standard on the 7840 SL. Dual power was an option with the SynchroShift, turning it into a 24-speed transmission |
SPEEDS 3
| Description | With 16.9-38 rear tires |
TRANSMISSION 4
The New Holland 7840 features an ElectroShift/Pulse Command transmission with a total of 16 gears, providing versatility in both forward and reverse operations. The push-button power shifting and de-clutching options offer improved efficiency by reducing the need for constant clutch operation, which can enhance operational comfort during long hours. However, operators may face a learning curve with the electronic controls, particularly when transitioning between gear ratio groups, necessitating familiarity for optimal performance.
| Transmission | ElectroShift/Pulse Command |
| Type | four-speed power shift |
| Gears | 16 forward and reverse |
| Clutch | wet disc |
| Oil capacity | 64qts / 60.6L |
| Description | Four power shift gears arranged in two synchronized ratio groups (1-4 and 5-8). Two synchronized ranges (low/high) and right-hand shuttle. Clutch must be used to shift range or move between the lower (1-4) and higher (5-8) gear ratio groups. Push-button power shifting between the four gears in a ratio group. Push-button de-clutching on the shuttle lever allow shifting without the foot clutch. The 16 power shift was standard on the 7840 SLE |
SPEEDS 4
| Description | With 16.9-38 rear tires |
MECHANICAL
The New Holland 7840 tractor offers a choice between 4x2 and 4x4 drive configurations, allowing for tailored traction and versatility depending on terrain and application needs. Its electro-hydraulic differential lock enhances traction in challenging conditions, while the hydrostatic power steering provides improved maneuverability. The optional Comfort Command Cab with air-conditioning enhances operator comfort during extended use, which is vital for productivity in varied climates.
| Chassis | 4x2 2WD/4x4 MFWD 4WD (optional) |
| Final drives | inboard planetary |
| Differential lock | electro-hydraulic (SLE) |
| Steering | hydrostatic power |
| Brakes | mechanical (S)/hydraulic wet disc (SL/SLE) |
| Cab | Two-post foldable ROPS with flat-deck platform. Comfort Command Cab optional with air-conditioning (SL/SLE) |
| Transmissions | 8-speed constant mesh 16-speed two-speed power shift 12-speed synchronized 16-speed four-speed power shift |
HYDRAULICS
| Type | open center (S/SL) closed center load sensing (SLE) |
| Valves | 1 to 4 |
| Pump flow | 17.4gpm / 65.9lpm 20gpm / 75.7lpm (SLE) |
| Steering press. | 2100psi / 144.8bar |
TRACTOR HITCH
| Rear Type | II |
| Control | Position control and top-link draft sensing. Electronic lower-link sensing optional on 7840 SLE |
| Rear lift (at 24 | 6,210lbs / 2816kg (SL) 8,240lbs / 3737kg (SL optional) 6,564lbs / 2977kg (SLE) 8,710lbs / 3950kg (SLE optional) |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540/1000 |
NEW HOLLAND 7840 TIRES
The New Holland 7840 tractor’s tire specifications indicate a robust configuration suitable for agricultural applications, with a front tire size of 10.00-16 for enhanced maneuverability and a larger rear tire size of 18.4-34 that provides improved traction and stability in field operations. This combination supports effective plowing and tilling, particularly in varied terrains. However, the larger rear tires may increase soil compaction and limit mobility in softer conditions if not carefully managed.
| Ag front | 10.00-16 |
| Ag rear | 18.4-34 |
DIMENSIONS
| 2WD Wheelbase | 106inches / 269cm |
| 4WD Wheelbase | 103inches / 261cm |
| Length | 176inches / 447cm |
| Width | 83inches / 210cm |
| 2WD Clearance (front axle) | 23inches / 58cm |
| 4WD Clearance (front axle) | 22inches / 55cm |
NEW HOLLAND 7840 WEIGHT
| 2WD ROPS Shipping | 8,076lbs / 3663kg |
| 4WD ROPS Shipping | 9,134lbs / 4143kg |
| 2WD Cab Shipping | 9,215lbs / 4179kg |
| 4WD Cab Shipping | 10,274lbs / 4660kg |
NEW HOLLAND 7840 HEIGHT
| Hood | 70inches / 177cm |
| Cab | 110inches / 279cm |
| Exhaust | 114inches / 289cm |
DIMENSIONS & TIRES
The New Holland 7840 tractor, with a weight range of 8076 to 10274 pounds, offers stability and traction, particularly in agriculture or heavy-duty applications. Its 2WD and 4WD configurations (106 inches and 103 inches wheelbase respectively) allow flexibility for various terrains, with 4WD providing enhanced traction in challenging conditions. However, the larger rear tires (18.4-34) may complicate movement in tight spaces, making it less ideal for confined area work.
| 2WD Wheelbase | 106inches / 269cm |
| 4WD Wheelbase | 103inches / 261cm |
| Weight | 8076 to 10274 pounds |
| Front tire | 10.00-16 |
| Rear tire | 18.4-34 |
FORD 7411 LOADER
| Height (to pin) | 134inches / 340cm |
| Clearance, dumped bucket | 99inches / 251cm |
| Dump reach | 48inches / 121cm |
| Breakout force (lift) | 5265lbs / 2388kg |
| Lift to full height (at pin) | 3050lbs / 1383kg |
FORD 7413 LOADER
| Height (to pin) | 159inches / 403cm |
| Clearance, dumped bucket | 125inches / 317cm |
| Dump reach | 39inches / 99cm |
| Breakout force (lift) | 6285lbs / 2850kg |
| Lift to full height (at pin) | 3490lbs / 1583kg |
7840 SERIAL NUMBERS
| Location | Data plate inside hood |
| 1991 | BC68791 |
| 1992 | BD02865 |
| 1993 | BD35935 |
| 1994 | BD65544 |
| 1995 | BD98440 |
| 1996 | 022132B |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 55 (ROPS)/100 (cab) |
| Batteries | 1 (ROPS)/2 (cab) |
| Battery CCA | 800 |
| Battery volts | 12 |