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| info | |
| NAA ↑ | |
| Series: | 640, 641 ↓ |
| Production | |
| Manufacturer: | Ford |
| Type: | Utility tractor |
| Factory: | Highland Park, Michigan, USA |
| Original price: | $2,056 (1957 ) |
| Variants | |
| 740: | row-crop |
| 620: | no PTO, hydraulics, or 3-point hitch |
| 630: | no PTO |
| 640: | four-speed |
| 650: | five-speed |
| 660: | five-speed, live PTO |
| Ford 640 Power | |
| Belt (claimed): | 30 hp 22.4 kW |
| Plows: | 2 (14-inch) |
| Drawbar (tested): | 28.59 hp 21.3 kW |
| Belt (tested): | 31.01 hp 23.1 kW |
| Mechanical | |
| Chassis: | 4x2 2WD |
| Steering: | manual, power assist optional |
| Brakes: | differential mechanical expanding shoe |
| Cab: | Open operator station. |
| Transmission: | 4-speed unsynchronized gear |
| Capacity | |
| Fuel: | 11 gal 41.6 L |
| Hydraulic system: | 2.25 gal 8.5 L |
| Hydraulics | |
| Capacity: | 2.25 gal 8.5 L |
| Steering flow: | 6.5 gpm 24.6 lpm |
| Steering press.: | 100 psi 6.9 bar |
| Tractor hitch | |
| Rear Type: | I |
| Rear lift: | 1,250 lbs 567 kg |
| Power Take-off (PTO) | |
| Rear PTO: | transmission (non-live) |
| Rear RPM: | 540 (1.125) |
| Dimensions & Tires | |
| Wheelbase: | 75.2 inches 191 cm |
| Weight: | 3031 lbs 1374 kg |
| Front tire: | 5.50-16 |
| Rear tire: | 11-28 |
| 640 Serial Numbers | |
| Location: | On the left-hand side of the transmission housing behind the starter. |
| Belt Pulley | |
| Diameter: | 9 inches 22 cm |
| Width: | 6.5 inches 16 cm |
| RPM: | 1,366 |
| Speed: | 3,218 ft/min 980.85 meters/min |
| Electrical | |
| Ground: | positive |
| Charging system: | generator |
| Charging amps: | 20 |
| Battery | |
| Number: | 1 |
| Volts: | 6 |
| info | |
| NAA ↑ | |
| Series: | 640, 641 ↓ |
| Engines overview | |
| Ford 2.2L 4-cyl gasoline, Ford 2.2L 4-cyl LP gas |
| Engine Detail | |
| Ford EAE Red Tiger, LP gas, 4-cylinder 8-valve, liquid-cooled vertical inline | |
| Displacement: | 134 ci 2.2 L |
| Bore/Stroke: | 3.44x3.60 inches 87 x 91 mm |
| Air cleaner: | oil bath |
| Compression: | 6.6:1 |
| Rated RPM: | 2200 |
| Firing order: | 1-2-4-3 |
| Sparkplug: | 14MM |
| Sparkplug gap: | 0.028 inches 0.711 mm (min), 0.031 inches 0.787 mm (max) |
| Engine Oil | |
| Oil capacity: | 5 qts 4.7 L |
| Oil change: | 100 h |
| info | |
| NAA ↑ | |
| Series: | 640, 641 ↓ |
| Transmission | |
| Transmission: | Ford |
| Type: | unsynchronized gear |
| Gears: | 4 forward and 1 reverse |
| Clutch: | dry disc |
| Speeds | |
| With 11x28 rear tires., |
| info | |
| NAA ↑ | |
| Series: | 640, 641 ↓ |
| Ford 640 Tires | |
| Ag front: | 5.50-16 |
| Ag rear: | 11-28 |
| Dimensions | |
| Wheelbase: | 75.2 inches 191 cm |
| Length: | 121.4 inches 308 cm |
| Width: | 64.75 inches 164 cm |
| Height: | 58.7 inches 149 cm |
| Weight: | 3031 lbs 1374 kg |
| Ballasted weight: | 3,641 lbs 1651 kg |
| Ground clearance: | 21 inches 53 cm |
| Front tread: | 52 to 76 inches 132 to 193 cm |
| Rear tread: | 52 to 76 inches 132 to 193 cm |