| Manufacturer | Ford |
| 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 |
FORD 7840 POWER
| PTO (claimed) | 90hp / 67.1kW |
| Drawbar (tested) | 75.2hp / 56.1kW |
| PTO (tested) | 90.4hp / 67.4kW |
ENGINE DETAIL
The Ford 7840 tractor's 6.6L Genesis diesel engine boasts a robust design with a high compression ratio of 17.5:1, enhancing thermal efficiency and power output at a rated RPM of 2100, making it suitable for various demanding agricultural tasks. Its 401ci displacement paired with a tight bore and stroke of 4.40 inches ensures effective combustion and torque delivery, but the specific valve clearances will necessitate regular maintenance checks to optimize performance and prevent damage. With a coolant capacity of 21.1 quarts (22.7 quarts for cab models), managing engine temperatures is critical in preventing overheating during prolonged use, especially in heavy-duty scenarios.
| 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 Ford 7840 tractor has an oil capacity of 22.1 quarts (20.9 liters), which is critical for optimal engine performance and longevity. Ensure regular oil changes to maintain lubrication efficiency and prevent wear; using the manufacturer's specified oil type can enhance engine functionality. A downside of larger oil capacities is the potential for higher maintenance costs, especially if frequent oil changes are required due to demanding operational conditions.
| Oil capacity | 22.1qts / 20.9L |
FORD 7840 ENGINE
The Ford 7840 features a robust 6.6L 6-cylinder diesel engine, providing substantial torque and power for heavy-duty applications, making it ideal for large-scale farming operations. Its fuel tank capacity of 57.5 gallons (217.6 liters) allows for extended operation between refueling, reducing downtime during fieldwork. However, operators should be aware of the weight distribution and handling characteristics when working on hilly or uneven terrain due to its large fuel capacity.
| Description | Ford 6.6L 6-cyl diesel |
| Fuel tank | 57.5gal / 217.6L |
TRANSMISSIONS OVERVIEW
The Ford 7840 tractor's transmission options—8-speed constant mesh, 16-speed two-speed power shift, and 12-speed synchronized—offer flexibility in speed selection, enhancing operator control across varied tasks. The 16-speed four-speed power shift maximizes productivity by allowing seamless gear changes under load, ideal for demanding conditions. A potential challenge is the complexity of the power shift mechanism, which may require trained operators for optimal performance and maintenance.
| Description | 8-speed constant mesh 16-speed two-speed power shift 12-speed synchronized 16-speed four-speed power shift |
TRANSMISSION 1
The Ford 7840 tractor features an EconoShift constant mesh transmission with 8 forward and 2 reverse gears, designed for efficient power transfer but requiring the tractor to be stopped and the clutch engaged for shifting, which may reduce operational efficiency in dynamic field conditions. The dry disc clutch ensures reliability but may require more frequent maintenance over time compared to hydraulic clutches. The optional creeper gear adds versatility for tasks requiring slow speeds, making it suitable for applications such as precision tillage or planting in tight spaces.
| 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 Ford 7840 tractor features a Dual Power transmission with a two-speed power shift, allowing for enhanced versatility with 16 forward and 4 reverse gears, optimizing torque for various field conditions. The dry disc clutch design ensures reliable engagement and durability under load; however, operators must monitor clutch performance for wear over time. The 69.6qt oil capacity supports extended service intervals, but it's crucial to maintain proper fluid levels to prevent overheating and ensure smooth operation, particularly when using the Dual Power feature in demanding scenarios.
| 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 Ford 7840 features a SynchroShift transmission with 12 synchronized forward and reverse gears, offering seamless gear transitions in medium and high ranges, ideal for varied agricultural tasks requiring precise control. The limitation is that the operator must stop the tractor to shift into or out of low range, which may reduce efficiency during variable work conditions. The optional dual power feature, enhancing it to a 24-speed transmission, provides greater operational flexibility and adaptability in diverse field scenarios.
| 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 Ford 7840 tractor features a versatile ElectroShift/Pulse Command four-speed power shift transmission, enabling smooth operation across 16 forward and reverse gears, which enhances productivity in various field conditions. A notable advantage is the push-button gear shifting that reduces operator fatigue, while the wet disc clutch system enhances durability but requires careful management to avoid overheating during extensive use. This design is particularly beneficial in applications demanding frequent gear changes, such as tillage or heavy implements, although operators must be adept at managing the shift between the lower and higher gear ratio groups 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 Ford 7840 tractor features a versatile 4x2 or optional 4x4 MFWD configuration, enhancing traction for various agricultural tasks. Its inboard planetary final drives provide robust power distribution, while the electro-hydraulic differential lock ensures optimal traction in challenging conditions. The range of transmission options, including 16-speed power shift, allows for precise control over speed and torque, making this tractor suitable for both tillage and transport operations.
| 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 |
FORD 7840 TIRES
The Ford 7840 tractor is equipped with Ag front tires measuring 10.00-16 and Ag rear tires of 18.4-34, providing a balanced setup for versatile field operations and optimal traction on varied terrain. The larger rear tires enhance stability and payload capacity, making it suitable for heavy-duty tasks such as plowing or hauling. However, the tire configuration may limit maneuverability in tight spaces, making it less ideal for confined agricultural environments.
| 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 |
FORD 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 |
FORD 7840 HEIGHT
| Hood | 70inches / 177cm |
| Cab | 110inches / 279cm |
| Exhaust | 114inches / 289cm |
DIMENSIONS & TIRES
The Ford 7840 tractor's 2WD configuration with a 106-inch wheelbase offers enhanced stability for towing or fieldwork, while its lighter weight range of 8,076 to 10,274 pounds allows for versatility in handling various soil types. The 4WD version, with a slightly shorter 103-inch wheelbase, improves traction, making it suitable for challenging terrains and wetter conditions. A common challenge is managing tire pressures for optimal performance; the rear tire size of 18.4-34 enhances stability in heavy-duty applications.
| 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 |