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TractorSpex

Tractor data for over 20,000 different models.

Home > Farmall > M

Farmall M

Engine:

Farmall Standard

Power:

38 HP (Engine) / HP (PTO)

Fuel Type:

Diesel

Production:

1939 - 1954

Detailed Specifications

Overview


Overview
Summary	x1939 - 1954 Row-Crop tractor


Production
Manufacturer	Farmall (a part of International Harvester)
Summary	Row-Crop tractor / Built in Rock Island, Illinois, USA
Total built	270,140
Original price	$1,440 (1946 )
	$2,600 (1952 )
Summary	The M was also available in the MV high-clearance "vegetable version" and the MD diesel. The Farmall M was the row-crop version of the McCormick-Deering W-6. In the late 1950s, the M continued production at Doncaster after it had ceased at the Farmall Works, these are often referred to as a model BM.


Mechanical
Summary	Two-wheel drive / Manual steering / Mechanical contracting band brakes / Open operator station.


Hydraulics
Type	Lift-All * Optional. Transmission-driven pump.
Pressure	500 psi (early) 34.5 bar
	800 psi (late) 55.2 bar


References
Summary	/ Farmall Letter Series Tractors by Lee Klancher / No. 30 Power Loader published by International Harvester / Farm Loaders published in 1962, by International Harvester / Operator's Manual Farmall M and MV / General Line Catalog published in 1949, by International Harvester

Engine Specifications


Engine options
Summary	International Harvester 4.1L 4-cyl distillate / International Harvester 4.1L 4-cyl gasoline


Engine Detail
Summary	International Harvester / distillate / 4-cylinder / liquid-cooled vertical I-head
Displacement	247.7 ci 4.1 L
Bore/Stroke	3.875x5.25 inches 98 x 133 mm
Compression	4.75:1
	4.5:1 * Kerosene engine
Rated RPM	1,450
Firing order	1-3-4-2
Oil capacity	8 qts 7.6 L
Coolant capacity	24 qts 22.7 L
Sparkplug gap	0.025 inches 0.635 mm
Point gap	0.013 inches (Magneto) 0.330 mm
	0.020 inches (Distributer) 0.508 mm
Intake valve clearance	0.017 inches * Hot 0.432 mm
Exhaust valve clearance	0.017 inches * Hot 0.432 mm


Engine Detail
Summary	International Harvester C248 / gasoline / 4-cylinder / liquid-cooled vertical I-head
Displacement	247.7 ci 4.1 L
Bore/Stroke	3.875x5.25 inches 98 x 133 mm
Compression	5.65:1
Rated RPM	1450
Firing order	1-3-4-2
Oil capacity	8 qts 7.6 L
Coolant capacity	24 qts 22.7 L

Transmission & PTO


Transmission
Type	sliding gear
Gears	5 forward and 1 reverse

Dimensions & Weight


Farmall M Tires
Ag front	6.00-16
Ag rear	11-38
Ag front	22.50x4 (steel)
Ag rear	51x8 (steel)
	10-38
	12-38
	11.25-36


Dimensions
Wheelbase	88.5 inches 224 cm
Length	133 inches 337 cm
Width	84 inches 213 cm
Height	78.3 inches 198 cm
Shipping weight	4858 lbs 2203 kg
Ballasted weight	6770 lbs 3070 kg
Front tread	9.125 inches 23 cm
Rear tread	52 to 88 inches 132 to 223 cm

Performance Tests


Tractor Tests
Summary	NTTL 327: distillate 5-speed 2WD / NTTL 328: gasoline 5-speed 2WD


Nebraska Tractor Test 327
Summary	Distillate 5-speed 2WD September 5 - 16, 1939 Link: Nebraska Tractor Test 327 file
Belt power (max)	34.82 hp 26.0 kW
Belt fuel use (max)	2.8 gal/hour 10.6 l/hour
Summary	PTO performance
Power at rated engine speed	34.16 hp 25.5 kW
Fuel use	2.7 gal/hour 10.2 l/hour
Summary	Drawbar performance
Max power	30.62 hp 22.8 kW
Summary	Gear 2 used for power test.
Max pull	4,365 lbs 1979 kg
Summary	Gear 1 used for pull test.


Nebraska Tractor Test 328
Summary	Gasoline 5-speed 2WD September 11 - 21, 1939 Link: Nebraska Tractor Test 328 file
Belt power (max)	36.66 hp 27.3 kW
Belt fuel use (max)	3.0 gal/hour 11.4 l/hour
Summary	PTO performance
Power at rated engine speed	36.07 hp 26.9 kW
Fuel use	3.0 gal/hour 11.4 l/hour
Summary	Drawbar performance
Max power	33.1 hp 24.7 kW
Max pull	4,266 lbs 1935 kg
Summary	Gear 1 used for pull test.

Last Database Update: 12/7/2025