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Ford 7840

Ford 7840 tractor
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The Ford 7840 is a row-crop tractor produced from 1991 to 1995 as part of the PowerStar 40 Series. It was built in Basildon, England. The tractor features a Ford Genesis 6.6L 6-cylinder 12-valve liquid-cooled diesel engine with 90 hp PTO power. It offers multiple transmission options including 8-speed constant mesh, 12-speed synchronized, and 16-speed power shift variants. The 7840 has 2WD and optional 4WD drive configurations, with mechanical and hydraulic brake options. It includes open center and closed center load sensing hydraulic systems, and a rear Type II hitch with position control and draft sensing. The tractor's dimensions include a 2WD wheelbase of 106 inches and a length of 176 inches. It has a fuel tank capacity of 57.5 gallons and various weight configurations depending on cab and drive options. Electrical system features a negative ground, alternator charging system, and 12-volt battery setup. The 7840 was offered in variants 7840S, 7840SL, and 7840SLE with different transmission and feature packages.
Ford 7840tractorspecificationsenginetransmissiondimensionshydraulicsfarm tractor
Power100 hp[P]
Founded1991 - 1995
Model7840

Technical Specifications

Detailed specifications and technical data for Ford 7840

Power

PTO (tested):90.4 hp (67.4 kW)
PTO (claimed):90 hp (67.1 kW)
Drawbar (tested):75.2 hp (56.1 kW)

Engine

Type:diesel
Cooling:liquid-cooled
Idle RPM:725-2275
Cylinders:6-cylinder 12-valve
Fuel tank:57.5 gal (217.6 L)
Rated RPM:2100
Bore/Stroke:4.40x4.40 inches (112 x 112 mm)
Compression:17.5:1
Displacement:401 ci (6.6 L)
Engine model:Ford Genesis
Firing order:1-5-3-6-2-4
Oil capacity:22.1 qts (20.9 L)
Starter volts:12
Coolant capacity:21.1 qts (20.0 L), 22.7 qts (cab) (21.5 L)
Intake valve clearance:0.016 inches (cold) (0.406 mm)
Exhaust valve clearance:0.019 inches (cold) (0.483 mm)

Height

Cab:110 inches (279 cm)
Hood:70 inches (177 cm)
Exhaust:114 inches (289 cm)

Weight

2WD Cab Shipping:9,215 lbs (4179 kg)
4WD Cab Shipping:10,274 lbs (4660 kg)
2WD ROPS Shipping:8,076 lbs (3663 kg)
4WD ROPS Shipping:9,134 lbs (4143 kg)

Variants

7840S:8-speed economy
7840SL:12-speed
7840SLE:16-speed premium

Electrical

Ground:negative
Batteries:1 (ROPS), 2 (cab)
Battery CCA:800
Battery volts:12
Charging amps:55 (ROPS), 100 (cab)
Charging system:alternator

Hydraulics

Type:open center (S/SL), closed center load sensing (SLE)
Valves:1 to 4
Pump flow:17.4 gpm (65.9 lpm), 20 gpm (SLE) (75.7 lpm)
Steering pressure:2100 psi (144.8 bar)

Mechanical

ROPS:Two-post foldable ROPS with flat-deck platform. Comfort Command Cab optional with air-conditioning (SL/SLE).
Drive:4x2 2WD, 4x4 MFWD 4WD (optional)
Brakes:mechanical (S), hydraulic wet disc (SL/SLE)
Final drives:inboard planetary
Power steering:-
Differential lock:electro-hydraulic (SLE)

Production

Type:Row-Crop tractor
Series:PowerStar 40 Series
Built in:Basildon, England
Years made:1991 - 1995
Original price:$35,650 (1996)

Transmission

Transmission options:8-speed constant mesh, 16-speed two-speed power shift, 12-speed synchronized, 16-speed four-speed power shift

12-speed synchronized

Type:synchronized
Gears:12 forward and reverse
Notes: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.
Clutch:dry disc
Transmission:SynchroShift

8-speed constant mesh

Type:constant mesh
Gears:8 forward and 2 reverse
Notes: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.
Clutch:dry disc
Oil capacity:69.6 qts (65.9 L)
Transmission:EconoShift

16-speed two-speed power shift

Type:two-speed power shift
Gears:16 forward and 4 reverse
Notes: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.
Clutch:dry disc
Oil capacity:69.6 qts (65.9 L)
Transmission:Dual Power

16-speed four-speed power shift

Type:four-speed power shift
Gears:16 forward and reverse
Notes: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.
Clutch:wet disc
Oil capacity:64 qts (60.6 L)
Transmission:ElectroShift/Pulse Command

Tractor hitch

Control:Position control and top-link draft sensing. Electronic lower-link sensing optional on 7840 SLE.
Rear Type:II
Rear lift (at 24"/610mm):6,210 lbs (SL) (2816 kg), 8,240 lbs (SL optional) (3737 kg), 6,564 lbs (SLE) (2977 kg), 8,710 lbs (SLE optional) (3950 kg)

Dimensions & Tires

Width:83 inches (210 cm)
Length:176 inches (447 cm)
Weight:8076 to 10274 pounds
Rear tire:18.4-34
Front tire:10.00-16
2WD Wheelbase:106 inches (269 cm)
4WD Wheelbase:103 inches (261 cm)
2WD Clearance (front axle):23 inches (58 cm)
4WD Clearance (front axle):22 inches (55 cm)

Power Take-off (PTO)

Rear PTO:independent
Rear PTO Type:540/1000

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