Overview
The Ford 6640 is a farm utility tractor manufactured in Basildon, England between 1991 and 1998, featuring a 5.0L 4-cylinder Ford Genesis diesel engine. It was produced in three variants (S, SL, and SLE) with configurations including 2WD or 4WD and options for a two-post foldable ROPS or a Comfort Command Cab.
Ideal Applications
Transmission and Drive Configuration:
Available in 8-speed constant mesh, 12-speed synchronized, or 16-speed power shift versions, the 6640 includes an independent rear 540 PTO and inboard planetary final drives.
Tested Power and Efficiency:
OECD Test 1657 recorded a maximum PTO power of 77.13 hp and a maximum drawbar pull of 10,512 lbs, with fuel consumption measured at 4.7 gallons per hour during power testing.
Chassis and Hydraulic Specifications:
The tractor features a 93-inch wheelbase and a rear Type II hitch with a 4,200 lb lift capacity at 24 inches, supported by an 18.2 gpm open-center hydraulic pump system.
Production
| Description | Utility tractor / Built in Basildon, England / Original price was $33,400 in 1998 |
|---|---|
| Manufacturer | Ford |
Engine
| Engine type | Ford 5.0L 4-cyl diesel |
|---|---|
| Fuel tank | 25 gal (94.6 L) |
| Air cleaner | dual paper elements |
| Bore/Stroke | 4.40x5.00 inches (112 x 127 mm) |
| Compression | 17.5:1 |
| Coolant capacity | 15.3 qts (14.5 L) |
| Description | Ford Genesis / diesel / 4-cylinder 8-valve / liquid-cooled |
| Displacement | 304 ci (5.0 L) |
| Exhaust valve clearance | 0.019 inches (cold) (0.483 mm) |
| Firing order | 1-3-4-2 |
| Idle RPM | 725-2375 |
| Intake valve clearance | 0.016 inches (cold) (0.406 mm) |
| Power (gross) | 90.7 hp (67.6 kW) |
| Power (net) | 85 hp (63.4 kW) |
| Rated RPM | 2200 |
| Starter volts | 12 |
| Torque | 337 lb-ft (457.0 Nm) |
| Torque RPM | 1200 |
| Oil capacity | 12.1 qts (11.5 L) |
| Drawbar (tested) | 67.18 hp (50.1 kW) |
| Engine (gross) | 90.7 hp (67.6 kW) |
| Engine (net) | 85 hp (63.4 kW) |
| PTO (claimed) | 76 hp (56.7 kW) |
| PTO (tested) | 77.13 hp (57.5 kW) |
Transmission
| Clutch | dry disc / dry disc / dry disc / wet disc |
|---|---|
| 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 6640S. / 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. |
| Gears | 8 forward and 2 reverse / 16 forward and 4 reverse / 12 forward and reverse / 16 forward and reverse |
| Oil capacity | 69.6 qts (65.9 L) / 69.6 qts (65.9 L) / 64 qts (60.6 L) |
| Transmission | EconoShift / Dual Power / SynchroShift / ElectroShift/Pulse Command |
| Type | constant mesh / two-speed power shift / synchronized / four-speed power shift |
| Transmission type | 8-speed constant mesh / 16-speed two-speed power shift / 12-speed synchronized / 16-speed four-speed power shift |
| Transmission type | 8-speed constant mesh / 16-speed two-speed power shift / 12-speed synchronized / 16-speed four-speed power shift |
Mechanical
| Brakes | mechanical (S) |
|---|---|
| Cab | Two-post foldable ROPS. Straddle-mount (6640 S) or raised deck (SL/SLE). Comfort Command Cab optional with air-conditioning (SL/SLE). |
| Description | Power steering |
| Differential lock | mechanical (S) |
| Drive | 4x2 2WD |
| Final drives | inboard planetary |
Hydraulics
| Pump flow | 18.2 gpm (68.9 lpm) |
|---|---|
| Steering press. | 2100 psi (144.8 bar) |
| Type | open center (S/SL) |
| Valves | 1 to 4 |
Hitch
| Control | Position control and top-link draft sensing. Electronic lower-link sensing optional on 6640 SLE. |
|---|---|
| Rear lift (at 24"/610mm) | 4200 lbs (1905 kg) |
| Rear Type | II |
PTO
| Rear PTO | independent |
|---|---|
| Rear PTO Type | 540 |
Electrical
| Battery CCA | 800 |
|---|---|
| Battery volts | 12 |
| Cab Batteries | 2 |
| Cab Charging amps | 100 |
| Charging system | alternator |
| Ground | negative |
| ROPS Batteries | 1 |
| ROPS Charging amps | 55 |
Dimensions & Tires
| 2WD Clearance (front axle) | 22 inches (55 cm) |
|---|---|
| 2WD Width | 77 inches (195 cm) |
| 4WD Clearance (front axle) | 20 inches (50 cm) |
| 4WD Width | 80 inches (203 cm) |
| Length | 162 inches (411 cm) |
| Wheelbase | 93 inches (236 cm) |
| Front tire | 7.50-16 |
| Rear tire | 16.9-30 |
| Weight | 7099 to 9121 pounds |
| Wheelbase | 93 inches (236 cm) |
| Ag front | 7.50-16 |
| Ag rear | 16.9-30 |
6640 Serial Numbers
| 1991 | BC68791 |
|---|---|
| 1992 | BD02865 |
| 1993 | BD35935 |
| 1994 | BD65544 |
| 1995 | BD98440 |
| 1996 | 021630B |
| 1997 | 056502B |
| 1998 | 083503B |
| Description | FAQ: How to read a serial number table. |
| Location: | Data plate inside hood. |
Ford 6640 Height
| Cab | 107 inches (271 cm) |
|---|---|
| Exhaust | 112 inches (284 cm) |
| Hood | 67 inches (170 cm) |
Ford 6640 Weight
| 2WD Cab Shipping | 8,129 lbs (3687 kg) |
|---|---|
| 2WD ROPS Shipping | 7,099 lbs (3220 kg) |
| 4WD Cab Shipping | 9,121 lbs (4137 kg) |
| 4WD ROPS Shipping | 8,091 lbs (3670 kg) |
| Ballasted | 10,368 lbs (4702 kg) |
| Operating | 8,135 lbs (4WD ROPS) (3690 kg) |
Ford 6640 attachments
| Description | front-end loader |
|---|
OCED Tractor Test 1657
| Description | 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. |
|---|---|
| Fuel use | 4.7 gal/hour (17.8 l/hour) / 4.7 gal/hour (17.8 l/hour) / 4.5 gal/hour (17.0 l/hour) / 4.7 gal/hour (17.8 l/hour) |
| Max power | 77.13 hp (57.5 kW) / 67.18 hp (50.1 kW) |
| Max pull | 10,512 lbs (4768 kg) |
| Power at rated engine speed | 76.75 hp (57.2 kW) |
| Power at rated PTO speed | 75.63 hp (56.4 kW) |
References
| Description | Front-end Loaders published in 1992, by Ford / Front-end Loaders published in 1995, by New Holland / 66 to 106 PTO hp PowerStar Tractors published in 1991, by Ford / 66 to 106 PTO hp PowerStar Tractors published in 1992, by Ford |
|---|
Speeds
| Description | With 16.9-34 rear tires. / With 16.9-34 rear tires. / With 16.9-38 rear tires. / With 16.9-38 rear tires. |
|---|
Variants
| 6640S | 8-speed economy |
|---|---|
| 6640SL | 12-speed |
| 6640SLE | 16-speed premium |