Tractor · 1957Unverified
Ford 641
Ford 641 — 601 Workmaster Series · 48 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
48 hp
Max power
22.2 kW
Weight
1492 kg
Hover a source tag to verify
Overview
ManufacturerFordReference
Utility tractorReference
Built in Highland Park, Michigan, USAReference
Original price was $3,096 in 1961Reference
An orchard variant was also available, with a model number of 641-21.Reference
Two-wheel driveReference
SteeringmanualReference
Steeringpower assist optionalReference
Differential mechanical expanding shoe brakesReference
Open operator station.Reference
Variants
611Select-O-Speed, no PTOReference
621Four-speed, no PTO or 3-pointReference
631Four-speed, no PTOReference
641Four-speedReference
651Five-speedReference
661Five-speed, live PTOReference
671Select-O-SpeedReference
681Select-O-Speed, dual-speed PTOReference
Engine
Ford 2.2L 4-cyl gasolineReference
Ford 2.4L 4-cyl dieselReference
Ford 2.2L 4-cyl LP gasReference
Engine (gross)36.1 kWReference
Belt (claimed)23.9 kWReference
Plows2 (14-inch)Reference
Drawbar (tested)22.2 kWReference
Belt (tested)25.1 kWReference
Ford EAE Red TigerReference
gasolineReference
4-cylinder 8-valveReference
liquid-cooled vertical inlineReference
Displacement2.2 LReference
Bore/Stroke87 x 91 mmReference
EmissionsTier 0Reference
Power (gross)36.1 kWReference
Air cleaneroil bathReference
Compression7.5:1Reference
Rated RPM2200Reference
Torque171.9 NmReference
Torque RPM1600Reference
Firing order1-2-4-3Reference
Starter volts6Reference
Coolant capacity14.2 LReference
Sparkplug14MMReference
Sparkplug gap0.635 mmReference
Sparkplug gap0.711 mmReference
Oil capacity4.7 LReference
Oil change100 hReference
FordReference
dieselReference
Displacement2.4 LReference
Bore/Stroke90 x 91 mmReference
Power (gross)31.8 kWReference
Compression16.8:1Reference
Starter volts12Reference
LP gasReference
Belt power (max)25.1 kWReference
Max power22.2 kWReference
Power at rated engine speed23.7 kWReference
Max power21.9 kWReference
Transmission
4-speed unsynchronized gearReference
12-speed unsynchronized gearReference
ManufacturerFordReference
Typeunsynchronized gearReference
Gears4 forward and 1 reverseReference
Clutch254mm dry discReference
Oil capacity5.7 LReference
Oil typeSAE 80 Mild EPReference
Gears12 forward and 3 reverseReference
Clutchdry discReference
The 12-speed adds a mechanical over/under to the basic four-speed transmission.Reference
PTO & Hydraulics
PTO (tested)23.7 kWReference
Hydraulic system7.6 LReference
Typeopen centerReference
Capacity7.6 LReference
Total flow15.1 lpmReference
Rear TypeIReference
Controlposition and draft controlReference
Rear lift567 kgReference
Rear PTOtransmissionReference
Rear PTO Type540 (1.375)Reference
Power at rated PTO speed18.9 kWReference
Capacities
Fuel49.2 LReference
Rear axle7.6 LReference
Dimensions
Weight1492 kgReference
Front tire5.50-16Reference
Rear tire11-28Reference
Ag front5.50-16Reference
Ag rear11-28Reference
Operating weight1492 kgReference
Ballasted weight2505 kgReference
Front tread132 to 203 cmReference
Rear tread132 to 193 cmReference
Ford 641 attachments
front-end loaderReference
641 Serial Number Location
Transmission case, top left, behind the starter.Reference
641 Serial Numbers
19571001Reference
195811977Reference
195958312Reference
1960105943Reference
1961131427Reference
1962155531Reference
FAQ: How to read a serial number table.Reference
Electrical
Groundpositive (6V)Reference
Groundnegative (12V)Reference
Charging systemgeneratorReference
Charging amps20Reference
Battery volts6 (gas/lp)Reference
Battery volts12 (diesel)Reference
Battery AH80 (6V)Reference
Battery AH135 (12V)Reference
Attachment overview
Ford 1200 loaderReference
Ford 711 loaderReference
Test results
NTTL 642: gasoline 12-speed 2WDReference
NTTL 686: diesel 12-speed 2WDReference
Gasoline 12-speed 2WDMarch 20 - 31, 1958Link: Nebraska Tractor Test 642 fileReference
Belt fuel use (max)12.9 l/hourReference
Drawbar performanceReference
Gear 5 used for power test.Reference
Max pull1860 kgReference
Gear 1 used for pull test.Reference
Diesel 12-speed 2WDMarch 11 - 18, 1959Link: Nebraska Tractor Test 686 fileReference
PTO performanceReference
Fuel use8.3 l/hourReference
Fuel use6.8 l/hourReference
Fuel use8.7 l/hourReference
Max pull1918 kgReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.