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Years in Production / 1991–1995
Ford
6640
Explore the specifications, hardware, and original references for the Ford 6640.
90hp
Source index power
MFWD Optional
Drive
1991–1995
Production years
Ford
Manufacturer
6640 / 01
At a glance
Overview
1991 - 1995
PowerStar 40 Series
Utility tractor
Production
Utility tractor
Built in Basildon, England
Original price was $33,400 in 1998
- Manufacturer
- Ford
Mechanical
Power steering
Two-post foldable ROPS. Straddle-mount (6640 S) or raised deck (SL/SLE). Comfort Command Cab optional with air-conditioning (SL/SLE).
- Drive
- 4x2 2WD
- Drive
- 4x4 MFWD 4WD (optional)
- Final Drives
- inboard planetary
- Differential Lock
- mechanical (S)
- Differential Lock
- electro-hydraulic (SL/SLE)
- Brakes
- mechanical (S)
- Brakes
- hydraulic wet disc (SL/SLE)
Hydraulics
- Type
- open center (S/SL)
- Type
- closed center load sensing (SLE)
- Valves
- 1 to 4
- Pump Flow
- 18.2 gpm68.9 lpm
- Pump Flow
- 21 gpm (SLE)79.5 lpm
- Steering Press
- 2100 psi144.8 bar
Hitch
- Rear Type
- II
- Control
- Position control and top-link draft sensing. Electronic lower-link sensing optional on 6640 SLE.
- Rear Lift At24610mm
- 4200 lbs1905 kg
- Rear Lift At24610mm
- 4439 lbs (optional)2013 kg
- Rear Lift At24610mm
- 6210 lbs (SLE)2816 kg
- Rear Lift At24610mm
- 6564 lbs (SLE optional)2977 kg
Pto
- Rear Pto
- independent
- Rear Type
- 540
- Rear Type
- 540/1000 OptOptional
Electrical
- Ground
- negative
- Charging System
- alternator
- Rops Charging Amps
- 55
- Cab Charging Amps
- 100
- Rops Batteries
- 1
- Cab Batteries
- 2
- Battery Cca
- 800
- Battery Volts
- 12
6640 / 02
Under the hood
Engine Detail
Ford Genesis
diesel
4-cylinder 8-valve
liquid-cooled
- Displacement
- 304 ci5.0 L
- Bore Stroke
- 4.40x5.00 inches112 x 127 mm
- Power Net
- 85 hp63.4 kW
- Power Gross
- 90.7 hp67.6 kW
- Air Cleaner
- dual paper elements
- Compression Ratio
- 17.5:1
- Rated Rpm
- 2200
- Idle Rpm
- 725-2375
- Torque
- 337 lb-ft457.0 Nm
- Torque Rpm
- 1200
- Firing Order
- 1-3-4-2
- Starter Volts
- 12
- Coolant Capacity
- 15.3 qts14.5 L
- Coolant Capacity
- 16.9 qts*With cab16.0 L
- Intake Valve Clearance
- 0.016 inches (cold)0.406 mm
- Exhaust Valve Clearance
- 0.019 inches (cold)0.483 mm
- Fuel Type
- diesel
- Cylinders
- 4
- Cooling
- liquid-cooled
- Oil Capacity
- 12.1 qts11.5 L
Engine Options
Ford 5.0L 4-cyl diesel
- Fuel Tank
- 25 gal94.6 L
- Fuel Tank
- 52.7 gal (ROPS optional)199.5 L
- Fuel Tank
- 46.9 gal (cab optional)177.5 L
6640 / 03
Gears & controls
Transmission (Option 1)
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 6640S.
- Transmission
- EconoShift
- Transmission Type
- constant mesh
- Gears
- 8 forward and 2 reverse
- Clutch
- dry disc
- Oil Capacity
- 69.6 qts65.9 L
- Speeds Description
- With 16.9-34 rear tires.
Transmission (Option 2)
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 6640S.
- Transmission
- Dual Power
- Transmission Type
- two-speed power shift
- Gears
- 16 forward and 4 reverse
- Clutch
- dry disc
- Oil Capacity
- 69.6 qts65.9 L
- Speeds Description
- With 16.9-34 rear tires.
Transmission (Option 3)
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. Synchronized shuttle shifting. The 12-speed SynchroShift was standard on the 6640 SL. Dual power was an option with the SynchroShift, turning it into a 24-speed transmission.
- Transmission
- SynchroShift
- Transmission Type
- synchronized
- Gears
- 12 forward and reverse
- Clutch
- dry disc
- Speeds Description
- With 16.9-38 rear tires.
Transmission (Option 4)
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 6640 SLE.
- Transmission
- ElectroShift/Pulse Command
- Transmission Type
- four-speed power shift
- Gears
- 16 forward and reverse
- Clutch
- wet disc
- Oil Capacity
- 64 qts60.6 L
- Speeds Description
- With 16.9-38 rear tires.
Transmission Options
8-speed constant mesh
16-speed two-speed power shift
12-speed synchronized
16-speed four-speed power shift
6640 / 04
Size. Stance. Footprint.
Dimensions
- Length
- 162 in411 cm
- Width
- 80 in203 cm
- Height (cab)
- 107 in271 cm
- Wheelbase
- 93 in236 cm
Dimensions And Tires
- Wheelbase
- 93 inches236 cm
- Weight
- 7099 to 9121 pounds
- Front Tire
- 7.50-16
- Rear Tire
- 16.9-30
Tires And Tracks
- Front Ag
- 7.50-16
- Rear Ag
- 16.9-30
6640 / 05
Tractor Photos
See it in action
Videos
Watch Ford 6640 videos from their original YouTube creators.
6640 / 07
Tests (NTTL)
Oced Tractor Test1657
Diesel 16x4 4WDApril 24 - May 11, 1992Link: OCED Tractor Test 1657 file
PTO performance
Drawbar performance
Gear 5-Low used for power test.
Gear 2H used for pull test.
- Max Power
- 77.13 hp57.5 kW
- Max Power
- 67.18 hp50.1 kW
- Fuel Use
- 4.7 gal/hour17.8 l/hour
- Fuel Use
- 4.5 gal/hour17.0 l/hour
- Power At Rated Engine Speed
- 76.75 hp57.2 kW
- Power At Rated Pto Speed
- 75.63 hp56.4 kW
- Max Pull
- 10,512 lbs4768 kg