Ford 641

The Ford 641 is a tractor produced by Ford. It is equipped with a 134 ci 2.2 L engine. The listed engine power is Gasoline (gross): 48.4 hp / 36.1 kW; Diesel (gross): 42.7 hp / 31.8 kW. Transmission: 12 forward and 3 reverse. Operating weight: 3291 lbs 1492 kg.

Overview

	1957 - 1962 601 Workmaster SeriesUtility tractor 601 Workmaster Series Utility tractor

Production
Manufacturer	Ford
Utility tractor
Built in Highland Park, Michigan, USA
Original price was $3,096 in 1961
An orchard variant was also available, with a model number of 641-21.

Variants
611	Select-O-Speed, no PTO
621	Four-speed, no PTO or 3-point
631	Four-speed, no PTO
641	Four-speed
651	Five-speed
661	Five-speed, live PTO
671	Select-O-Speed
681	Select-O-Speed, dual-speed PTO

Ford 641 Power
Engine (gross)	48.4 hp 36.1 kW
Belt (claimed)	32 hp 23.9 kW
Plows	2 (14-inch)
Drawbar (tested)	29.82 hp 22.2 kW
PTO (tested)	31.78 hp 23.7 kW
Belt (tested)	33.65 hp 25.1 kW
Performance test details ...

Mechanical
Two-wheel drive
Steering	manual
	power assist optional
Differential mechanical expanding shoe brakes
Open operator station.

Capacity
Fuel	13 gal 49.2 L
Hydraulic system	2 gal 7.6 L
Rear axle	8 qts 7.6 L

Hydraulics
Type	open center
Capacity	2 gal 7.6 L
Total flow	4 gpm 15.1 lpm

Tractor hitch
Rear Type	I
Control	position and draft control
Rear lift	1250 lbs 567 kg

Power Take-off (PTO)
Rear PTO	transmission
Rear PTO Type	540 (1.375)

Dimensions & Tires
Weight	3291 lbs 1492 kg
Front tire	5.50-16
Rear tire	11-28
Full dimensions and tires ...

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)

References
Tractors For Industrial Use published in 1958, by Ford
1955-1960 Tractor Shop Manual (SE-8175) published in 1961
Power Up with Ford published in 1957
Diesel Tractors published in 1959, by Ford
New Ford 601 Series Workmaster Tractors published in 1957
New Ford Workmaster Tractors published in 1957

Engine

Engine options
Ford 2.2L 4-cyl gasoline
Ford 2.4L 4-cyl diesel
Ford 2.2L 4-cyl LP gas

Engine Detail — 134 ci / 2.2 L Gasoline

Manufacturer	Ford EAE Red Tiger
Fuel Type	Gasoline
Configuration	4-cylinder 8-valve, liquid-cooled vertical inline
Displacement	134 ci 2.2 L
Bore/Stroke	3.4375x3.60 inches 87 x 91 mm
Emissions	Tier 0
Power (gross)	48.4 hp 36.1 kW
Air cleaner	oil bath
Compression	7.5:1
Rated RPM	2200
Torque	126.8 lb-ft 171.9 Nm
Torque RPM	1600
Firing order	1-2-4-3
Starter volts	6
Coolant capacity	15 qts 14.2 L
Sparkplug	14MM
Sparkplug gap	0.025 inches (min) 0.635 mm
	0.028 inches (max) 0.711 mm
Oil capacity	5 qts 4.7 L
Oil change	100 h

Ford 641 Engine

Engine Detail — 144 ci / 2.4 L Diesel

Manufacturer	Ford
Fuel Type	Diesel
Configuration	4-cylinder 8-valve, liquid-cooled vertical inline
Displacement	144 ci 2.4 L
Bore/Stroke	3.562x3.60 inches 90 x 91 mm
Power (gross)	42.7 hp 31.8 kW
Air cleaner	oil bath
Compression	16.8:1
Rated RPM	2200
Firing order	1-2-4-3
Starter volts	12

Engine Detail — 134 ci / 2.2 L LP Gas

Manufacturer	Ford EAE Red Tiger
Fuel Type	LP gas
Configuration	4-cylinder 8-valve, liquid-cooled vertical inline
Displacement	134 ci 2.2 L
Bore/Stroke	3.4375x3.60 inches 87 x 91 mm
Compression	7.5:1
Rated RPM	2200
Firing order	1-2-4-3
Starter volts	6

Transmission

Transmission options
4-speed unsynchronized gear
12-speed unsynchronized gear

Transmission — 4 forward and 1 reverse unsynchronized gear

Manufacturer	Ford
Type	unsynchronized gear
Gears	4 forward and 1 reverse
Clutch	254mm dry disc
Oil capacity	6 qts 5.7 L
Oil type	SAE 80 Mild EP

Transmission — 12 forward and 3 reverse unsynchronized gear

Type	unsynchronized gear
Gears	12 forward and 3 reverse
Clutch	dry disc
The 12-speed adds a mechanical over/under to the basic four-speed transmission.

Dimensions

Ford 641 Tires
Ag front	5.50-16
Ag rear	11-28

Dimensions
Operating weight	3291 lbs 1492 kg
Ballasted weight	5523 lbs 2505 kg
Front tread	52 to 80 inches 132 to 203 cm
Rear tread	52 to 76 inches 132 to 193 cm

Tests

Tractor Tests
NTTL 642: gasoline 12-speed 2WD
NTTL 686: diesel 12-speed 2WD

Nebraska Tractor Test 642
Gasoline 12-speed 2WD March 20 - 31, 1958 Link: Nebraska Tractor Test 642 file
Belt power (max)	33.65 hp 25.1 kW
Belt fuel use (max)	3.4 gal/hour 12.9 l/hour
Drawbar performance
Max power	29.82 hp 22.2 kW
Gear 5 used for power test.
Max pull	4,101 lbs 1860 kg
Gear 1 used for pull test.

Nebraska Tractor Test 686
Diesel 12-speed 2WD March 11 - 18, 1959 Link: Nebraska Tractor Test 686 file
PTO performance
Power at rated engine speed	31.78 hp 23.7 kW
Fuel use	2.2 gal/hour 8.3 l/hour
Power at rated PTO speed	25.29 hp 18.9 kW
Fuel use	1.8 gal/hour 6.8 l/hour
Drawbar performance
Max power	29.33 hp 21.9 kW
Fuel use	2.3 gal/hour 8.7 l/hour
Gear 5 used for power test.
Max pull	4,230 lbs 1918 kg
Gear 1 used for pull test.

Photos

Ford 641

Ford 641

Ford 641

Ford 641

Ford 641 with LP-gas engine.

Ford 641 with LP-gas engine.

Ford 641 with LP-gas engine.

Ford 641 with LP-gas engine.

Ford 641-L operator station and controls.