| Manufacturer | Ford |
| Price | 3,096(USD) |
| Model | 641 |
| Equipment Type | Utility Tractors |
| Factory | Highland Park, Michigan, USA |
NEBRASKA TRACTOR TEST 642 2
| Description | Gasoline 12-speed 2WD March 20 - 31, 1958 Link: Nebraska Tractor Test 642 file Drawbar performance/Gear 5 used for power test. Gear 1 used for pull test |
| Belt power (max) | 33.65hp / 25.1kW |
| Belt fuel use (max) | 3.4gal/hour 12.9l/hour |
| Max power | 29.82hp / 22.2kW |
| Max pull | 4,101lbs / 1860kg |
NEBRASKA TRACTOR TEST 686 2
| Description | Diesel 12-speed 2WD March 11 - 18, 1959 Link: Nebraska Tractor Test 686 file PTO performance Drawbar performance Gear 5 used for power test Gear 1 used for pull test |
| Power at rated engine speed | 31.78hp / 23.7kW |
| Fuel use | 2.3gal / hour/ 8.7l / hour |
| Power at rated PTO speed | 25.29hp / 18.9kW |
| Max power | 29.33hp / 21.9kW |
| Max pull | 4,230lbs / 1918kg |
FORD 641 POWER
| Engine (gross) | 48.4hp / 36.1kW |
| Belt (claimed) | 32hp / 23.9kW |
| Plows | 2 (14-inch) |
| Drawbar (tested) | 29.82hp / 22.2kW |
| PTO (tested) | 31.78hp / 23.7kW |
| Belt (tested) | 33.65hp / 25.1kW |
ENGINES OVERVIEW
The Ford 641 tractor, equipped with a choice of 2.2L gasoline, 2.4L diesel, or 2.2L LP gas engines, provides versatility for various agricultural tasks. The gasoline variant offers quicker starts and lower initial costs; however, the diesel engine delivers superior fuel efficiency and torque for heavy-duty tasks, making it ideal for larger operations. The LP gas option can benefit from cleaner emissions but may require access to specific fueling infrastructure, which could be a limitation based on location.
| Description | Ford 2.2L 4-cyl gasoline Ford 2.4L 4-cyl diesel Ford 2.2L 4-cyl LP gas |
ENGINE DETAIL 1
The Ford 641 tractor features a 2.2L EAE Red Tiger engine, delivering 48.4 hp at 2200 RPM with a robust torque of 126.8 lb-ft at 1600 RPM, making it suitable for various farming tasks. Its oil bath air cleaner system enhances engine longevity in dusty environments, while a relatively low compression ratio of 7.5:1 indicates the engine is optimized for reliability over high performance. However, with Tier 0 emissions, it lacks modern environmental standards, which could limit its use in certain regions with strict regulations.
| Description | Ford EAE Red Tiger gasoline 4-cylinder 8-valve liquid-cooled vertical inline |
| Displacement | 134ci / 2.2L |
| Bore/Stroke | 3.4375x3.60inches / 87 x 91mm |
| Emissions | Tier 0 |
| Power (gross) | 48.4hp / 36.1kW |
| Air cleaner | oil bath |
| Compression | 7.5:1 |
| Rated RPM | 2200 |
| Torque | 126.8 lb-ft / 171.9Nm |
| Torque RPM | 1600 |
| Firing order | 1-2-4-3 |
| Starter volts | 6 |
| Coolant capacity | 15qts / 14.2L |
| Sparkplug | 14MM |
| Sparkplug gap | 0.025inches / 0.635mm (min) / 0.028 inches / 0.711mm (max) |
ENGINE OIL
The Ford 641 tractor has an oil capacity of 5 quarts (4.7 liters), necessitating regular maintenance to ensure optimal engine performance. An oil change interval of every 100 hours is crucial to prevent wear and extend engine life, especially under heavy load conditions. Neglecting this maintenance could lead to decreased efficiency and potential engine damage over time.
| Oil capacity | 5qts / 4.7L |
| Oil change | 100 h |
ENGINE DETAIL 2
The Ford 641 tractor features a robust 4-cylinder diesel engine with a high compression ratio of 16.8:1, enabling efficient fuel combustion and torque delivery at rated RPM of 2200, making it suitable for various agricultural tasks. With a gross power output of 42.7 hp, it provides adequate performance for medium-duty applications; however, its maintenance costs may increase due to the oil bath air cleaner design. Overall, the choice of a liquid-cooled system enhances durability, though potential challenges include ensuring proper coolant maintenance to prevent overheating in demanding situations.
| Description | Ford diesel 4-cylinder 8-valve liquid-cooled vertical inline |
| Displacement | 144ci / 2.4L |
| Bore/Stroke | 3.562x3.60inches / 90 x 91mm |
| Power (gross) | 42.7hp / 31.8kW |
| Air cleaner | oil bath |
| Compression | 16.8:1 |
| Rated RPM | 2200 |
| Firing order | 1-2-4-3 |
| Starter volts | 12 |
ENGINE DETAIL 3
The Ford 641 tractor features a 2.2L EAE Red Tiger LP gas engine, offering moderate power efficiency with a low compression ratio of 7.5:1, making it suitable for lighter agricultural applications. Its 2200 RPM rated speed is ideal for typical farm tasks, but may limit high-speed operations. The 6-volt starter system can pose challenges in colder climates, necessitating potential upgrades for reliable starting performance.
| Description | Ford EAE Red Tiger LP gas 4-cylinder 8-valve liquid-cooled vertical inline |
| Displacement | 134ci / 2.2L |
| Bore/Stroke | 3.4375x3.60inches / 87 x 91mm |
| Compression | 7.5:1 |
| Rated RPM | 2200 |
| Firing order | 1-2-4-3 |
| Starter volts | 6 |
FORD 641 ENGINES
The Ford 641 tractor is equipped with a versatile engine lineup, including a 2.2L 4-cyl gasoline engine, a 2.4L 4-cyl diesel, and a 2.2L 4-cyl LP gas option, allowing for flexibility in fuel type based on operator preference and availability. The gasoline engine offers quick start-ups and smooth operation, while the diesel variant provides better fuel efficiency and torque for heavy-duty tasks. However, the availability of LP gas may limit refueling options, making the gasoline or diesel models more practical for long-term usage scenarios.
| Description | Ford 2.2L 4-cyl gasoline Ford 2.4L 4-cyl diesel Ford 2.2L 4-cyl LP gas |
TRANSMISSIONS OVERVIEW
The Ford 641 tractor features a 4-speed unsynchronized gearbox, which enables straightforward shifting but can lead to gear grinding if not timed carefully. The 12-speed unsynchronized transmission provides greater versatility and allows for better fine-tuning of speed and torque for various agricultural tasks but may require more operator skill to manage. Operators should consider the trade-off between ease of use with the 4-speed versus the expanded functionality of the 12-speed in applications like tilling or hauling.
| Description | 4-speed unsynchronized gear 12-speed unsynchronized gear |
TRANSMISSION 1
The Ford 641 tractor features an unsynchronized transmission with 4 forward and 1 reverse gear, which may result in less smooth shifting compared to synchronized gear systems, particularly under heavy load conditions. With an oil capacity of 6 quarts (5.7L) and recommending SAE 80 Mild EP, proper lubrication is crucial for optimal performance and longevity. Ideal for light to moderate agricultural tasks, the simplicity of this model can be a pro for users seeking reliability, but the gear limitations may present challenges in more demanding scenarios.
| Manufacturer | Ford |
| Type | unsynchronized gear |
| Gears | 4 forward and 1 reverse |
| Oil capacity | 6qts / 5.7L / SAE 80 Mild EP |
TRANSMISSION 2
The Ford 641 tractor features an unsynchronized 12-speed transmission with a mechanical over/under, enhancing torque management and operational versatility. The dry disc clutch provides reliability but may require precise operation to prevent wear. This setup is ideal for diverse agricultural tasks, balancing power with flexibility, but may pose challenges for novice operators due to the lack of synchronizers.
| Manufacturer | Ford |
| Type | unsynchronized gear |
| Gears | 12 forward and 3 reverse |
| Clutch | dry disc |
| Description | The 12-speed adds a mechanical over under to the basic four-speed transmission. |
MECHANICAL
The Ford 641 tractor features a 4x2 2WD chassis, providing simplicity and ease of maintenance, though it may limit traction on uneven terrain. The optional power assist steering enhances maneuverability, particularly beneficial in tight working conditions; however, the manual steering may be less desirable for prolonged use. Its 4-speed and optional 12-speed unsynchronized transmissions offer versatility in speed selection, important for varying field activities, but may require skill in gear shifting.
| Chassis | 4x2 2WD |
| Steering | manual/power assist optional |
| Brakes | differential mechanical expanding shoe |
| Cab | Open operator station. |
| Transmissions | 4-speed unsynchronized gear 12-speed unsynchronized gear |
CAPACITY
| Fuel | 13gal / 49.2L |
| Hydraulic system | 2gal / 7.6L |
| Rear axle | 8qts / 7.6L |
HYDRAULICS
| Capacity | 2gal / 7.6L |
| Total flow | 4gpm / 15.1lpm |
TRACTOR HITCH
| Rear Type | I |
| Rear lift | 1,250lbs / 567kg |
POWER TAKE-OFF (PTO)
| Rear PTO | transmission |
| Rear RPM | 540 |
FORD 641 TIRES
The Ford 641 features a versatile tire size configuration with 5.50-16 front tires and 11-28 rear tires, offering a balance of traction and maneuverability in various agricultural applications. The larger rear tires enhance stability and load-carrying capacity, making it suitable for heavier implements and rough terrain. However, the smaller front tires may limit flotation in muddy conditions, which could be a challenge during wet weather operations.
| Ag front | 5.50-16 |
| Ag rear | 11-28 |
DIMENSIONS
| Operating weight | 3,291lbs / 1492kg |
| Ballasted weight | 5,523lbs / 2505kg |
| Front tread | 52 to 80inches / 132 to 203cm |
| Rear tread | 52 to 76inches / 132 to 193cm |
DIMENSIONS & TIRES
The Ford 641 tractor, weighing 3,291 lbs (1,492 kg), is optimized for both maneuverability and stability, thanks to its tire configurations: 5.50-16 in the front and 11-28 in the rear. This setup provides effective traction for various terrains, but the relatively narrow front tires may limit handling in muddy or loose conditions. Ideal for small to medium-sized farming operations, the 641 offers a good balance of power and weight, making it suitable for tillage, mowing, and other versatile agricultural tasks.
| Weight | 3,291lbs / 1492kg |
| Front tire | 5.50-16 |
| Rear tire | 11-28 |
FORD 711 LOADER
| Loader weight | 593lbs / 268kg |
| Height (to pin) | 126inches / 320cm |
| Clearance, dumped bucket | 80inches / 203cm |
| Dump reach | 36.1inches / 91cm |
| Clearance, level bucket | 96inches / 243cm |
| Breakout force (at pin) | 2500lbs / 1134kg |
| Lift to full height (at pin) | 1000lbs / 453kg |
641 SERIAL NUMBERS
| Location | Transmission case, top left, behind the starter. |
| 1957 | 1001 |
| 1958 | 11977 |
| 1959 | 58312 |
| 1960 | 105943 |
| 1961 | 131427 |
| 1962 | 155531 |
ELECTRICAL
| Ground | positive (6V)/negative (12V) |
| Charging system | generator |
| Charging amps | 20 |
| Battery volts | 6 (gas/lp)/12 (diesel) |
| Battery AH | 80 (6V)/135 (12V) |