Tractor · 1991Unverified
Ford 7840
Ford 7840 — PowerStar 40 Series · 90 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
90 hp
Max power
56.1 kW
Weight
8076 to 10274 pounds
Hover a source tag to verify
Overview
ManufacturerFordReference
Row-Crop tractorReference
Built in Basildon, EnglandReference
Original price$35,650 (1996)Reference
Drive4x2 2WDReference
Drive4x4 MFWD 4WD (optional)Reference
Final drivesinboard planetaryReference
Differential lockelectro-hydraulic (SLE)Reference
Power steeringReference
Brakesmechanical (S)Reference
Brakeshydraulic wet disc (SL/SLE)Reference
Two-post foldable ROPS with flat-deck platform. Comfort Command Cab optional with air-conditioning (SL/SLE).Reference
Variants
7840S8-speed economyReference
7840SL12-speedReference
7840SLE16-speed premiumReference
Engine
Ford 6.6L 6-cyl dieselReference
Fuel tank217.6 LReference
Drawbar (tested)56.1 kWReference
Ford GenesisReference
dieselReference
6-cylinder 12-valveReference
liquid-cooledReference
Displacement6.6 LReference
Bore/Stroke112 x 112 mmReference
Compression17.5:1Reference
Rated RPM2100Reference
Idle RPM725-2275Reference
Firing order1-5-3-6-2-4Reference
Starter volts12Reference
Coolant capacity20.0 LReference
Coolant capacity21.5 LReference
Intake valve clearance0.406 mmReference
Exhaust valve clearance0.483 mmReference
Oil capacity20.9 LReference
Power at rated engine speed67.4 kWReference
Max power56.1 kWReference
Transmission
8-speed constant meshReference
16-speed two-speed power shiftReference
12-speed synchronizedReference
16-speed four-speed power shiftReference
TransmissionEconoShiftReference
Typeconstant meshReference
Gears8 forward and 2 reverseReference
Clutchdry discReference
Oil capacity65.9 LReference
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.Reference
TransmissionDual PowerReference
Typetwo-speed power shiftReference
Gears16 forward and 4 reverseReference
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.Reference
TransmissionSynchroShiftReference
TypesynchronizedReference
Gears12 forward and reverseReference
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.Reference
TransmissionElectroShift/Pulse CommandReference
Typefour-speed power shiftReference
Gears16 forward and reverseReference
Clutchwet discReference
Oil capacity60.6 LReference
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.Reference
PTO & Hydraulics
PTO (claimed)67.1 kWReference
PTO (tested)67.4 kWReference
Typeopen center (S/SL)Reference
Typeclosed center load sensing (SLE)Reference
Valves1 to 4Reference
Pump flow65.9 lpmReference
Pump flow75.7 lpmReference
Steering press.144.8 barReference
Rear TypeIIReference
ControlPosition control and top-link draft sensing. Electronic lower-link sensing optional on 7840 SLE.Reference
Rear lift (at 24"/610mm)2816 kgReference
Rear lift (at 24"/610mm)3737 kgReference
Rear lift (at 24"/610mm)2977 kgReference
Rear lift (at 24"/610mm)3950 kgReference
Rear PTOindependentReference
Rear PTO Type540/1000Reference
Dimensions
2WD Wheelbase269 cmReference
4WD Wheelbase261 cmReference
Weight8076 to 10274 poundsReference
Front tire10.00-16Reference
Rear tire18.4-34Reference
Ag front10.00-16Reference
Ag rear18.4-34Reference
Length447 cmReference
Width210 cmReference
2WD Clearance (front axle)58 cmReference
4WD Clearance (front axle)55 cmReference
2WD ROPS Shipping3663 kgReference
4WD ROPS Shipping4143 kgReference
2WD Cab Shipping4179 kgReference
4WD Cab Shipping4660 kgReference
Ford 7840 attachments
front-end loaderReference
7840 Serial Numbers
Location:Data plate inside hood.Reference
1991BC68791Reference
1992BD02865Reference
1993BD35935Reference
1994BD65544Reference
1995BD98440Reference
1996022132BReference
FAQ: How to read a serial number table.Reference
Electrical
GroundnegativeReference
Charging systemalternatorReference
Charging amps55 (ROPS)Reference
Charging amps100 (cab)Reference
Batteries1 (ROPS)Reference
Batteries2 (cab)Reference
Battery CCA800Reference
Battery volts12Reference
Attachment overview
Ford 7411 loaderReference
Ford 7413 loaderReference
Ford 7840 Height
Hood177 cmReference
Cab279 cmReference
Exhaust289 cmReference
Test results
Diesel 16-speed 4WDSeptember 1992 - 1992,Reference
PTO performanceReference
Fuel use20.1 l/hourReference
Drawbar performanceReference
Fuel use22.3 l/hourReference
Speeds
With 16.9-34 rear tires.Reference
With 16.9-38 rear tires.Reference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.