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Tractor · 1991Unverified

Ford 7840

Name: Ford 7840
Brand: Ford

Ford 7840 — PowerStar 40 Series · 90 hp. Reference specifications; pending source verification.

The Ford 7840 is a tractor with a rated power of 90 hp, a mid-range figure for its class. It was produced from 1991 to 1995 and features a 6-cylinder diesel liquid-cooled engine, paired with mechanical front-wheel drive and a powershift transmission. The tractor has an operating weight of 8076 to 10274 pounds. It is suitable for operations covering 200–800 acres.

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

Catalogue coverage

Variants represented

Richest spec table

120 rows

Recorded power

90 hp

Transmissions

8-speed constant mesh

Production years

1991-1995

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

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.

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