Farmall M tractor specifications

1939 - 1954

1939 - 1954 Row-Crop tractor

Series:

Series:H ← MSuper M ↓

1939 - 1953

Row-Crop tractor

Production

Production
Manufacturer:	Farmall (a part of International Harvester)
Type:	Row-Crop tractor
Factory:	Rock Island, Illinois, USA
Total built:	391,227
Original price:	$2,000 (1953 )
The Farmall H is the row-crop version of the McCormick-Deering W-4.

Variants

Variants
H:	row-crop
HV:	high-crop
W-4:	standard tread
I-4:	industrial
O-4:	orchard

Farmall H Power

Farmall H Power
Drawbar (claimed):	19 hp 14.2 kW
Belt (claimed):	24 hp 17.9 kW
Drawbar (tested):	24.17 hp 18.0 kW
Belt (tested):	26.20 hp 19.5 kW
power test details ...

Farmall H Engines

Farmall H Engines
International Harvester 2.5L 4-cyl gasoline
International Harvester 2.5L 4-cyl distillate
International Harvester 2.5L 4-cyl kerosene
Engine details ...

Mechanical

Mechanical
Chassis:	4x2 2WD
Steering:	manual
Brakes:	mechanical contracting band
Cab:	Open operator station.
Transmission:	5-speed sliding gear
Transmission details ...

Capacity

Capacity
Fuel:	17.5 gal 66.2 L
Aux. fuel:	0.875 gal 3.3 L
Hydraulic system:	1 gal 3.8 L

Hydraulics

Hydraulics
Capacity:	1 gal 3.8 L

Tractor hitch

Tractor hitch
Type:	Lift-All*Pneumatic implement lift system.

Power Take-off (PTO)

Power Take-off (PTO)
Rear RPM:	540*The 1-3/8 shaft was adopted in 1942. Prior to that, a 1-1/8 inch shaft was used.

Dimensions & Tires

Dimensions & Tires
Wheelbase:	88.325 inches 224 cm
Weight:	3875 lbs 1757 kg
Front tire:	5.50-16
Rear tire:	51x6
Full dimensions and tires ...

H Serial Numbers

H Serial Numbers
Location:	Transmission housing on left.
photo of H serial number
1939:	501
1940:	10653
1941:	52387
1942:	93237
1943:	122091
1944:	150251
1945:	186123
1946:	214820
1947:	241143
1948:	268991
1949:	300876
1950:	327975
1951:	351923
1952:	375861
1953:	390500
how to read serial numbers...

External Links

External Links
Farmall-H.com: detailed information on the H

Electrical

Electrical
Ground:	positive
Charging system:	generator
Battery volts:	6

Production

Production Manufacturer:Farmall (a part of International Harvester)
Type:Row-Crop tractor
Factory:Rock Island, Illinois, USA
Total built:270,140
Original price:$1,440 (1946 )
Original price:$2,600 (1952 )
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.

Variants

Variants MD:diesel engine
MV:high-crop
MDV:diesel high-crop
AM:Australian-built M, built 1949-1954
BM:British-built M
W-6:standard-front
I-6:industrial

1941 - 1952

Row-Crop tractor

Series:

Series:	MD
	Super MD ↓

Production

Production
Manufacturer:	Farmall (a part of International Harvester)
Type:	Row-Crop tractor
Total built:	18,253
Original price:	$2,400 (1952)
The Farmall MD was the diesel version of the M. The MD was started on gasoline, by pulling a lever which enlarged the combustion chamber (to lower the compression) and closed the circuit for the spark plugs. After the engine was warm, it was switched over to diesel.

Variants

Variants
WD-6:	standard-front
ID-6:	industrial
M:	gasoline engine

Farmall MD Power

Farmall MD Power
PTO (claimed):	35 hp 26.1 kW
Plows:	3 (14-inch)
Drawbar (tested):	33.58 hp 25.0 kW
Belt (tested):	38.21 hp 28.5 kW
power test details ...

Farmall MD Engine

Farmall MD Engine
International Harvester 4.1L 4-cyl diesel
Fuel tank:	20 gal 75.7 L
Aux. fuel:	1 gal 3.8 L
Engine details ...

Mechanical

Mechanical
Chassis:	4x2 2WD
Steering:	manual
Brakes:	differential mechanical contracting band
Cab:	Open operator station.
Transmission:	5-speed sliding gear
Transmission details ...

Hydraulics

Hydraulics
Type:	Lift-All, transmission-driven
Pressure:	500 psi 34.5 bar (early)
	800 psi 55.2 bar (late)

Power Take-off (PTO)

Power Take-off (PTO)
Rear RPM:	540

Dimensions & Tires

Dimensions & Tires
Weight:	5,000 lbs 2268 kg
Front tire:	6.50-16
Rear tire:	12-38
Full dimensions and tires ...

MD Serial Numbers

MD Serial Numbers
photo of MD serial number
1941:	25371
1942:	50988
1943:	60011
1944:	67424
1945:	88085
1946:	105564
1947:	122823
1948:	151708
1949:	180514
1950:	213579
1951:	247518
1952:	290923
how to read serial numbers...

Electrical

Electrical
Ground:	positive
Batteries:	2
Battery volts:	6

Farmall M Power

Farmall M Power Drawbar (claimed):25 hp
18.6 kW
Belt (claimed):31-33 hp
23.1 kW
Plows:3 (14-inch)
Drawbar (tested):33.1 hp
24.7 kW
PTO (tested):36.07 hp
26.9 kW
Belt (tested):36.66 hp
27.3 kW
power test details ...

1939 - 1954

Row-Crop tractor

Series:

Series:	H ←	M
		Super M ↓

Nebraska Tractor Test 327

Nebraska Tractor Test 327
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
PTO performance
Power at rated engine speed:	34.16 hp 25.5 kW
Fuel use:	2.7 gal/hour 10.2 l/hour
Drawbar performance
Max power:	30.62 hp 22.8 kW
Gear 2 used for power test.
Max pull:	4,365 lbs 1979 kg
Gear 1 used for pull test.

Nebraska Tractor Test 328

Nebraska Tractor Test 328
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
PTO performance
Power at rated engine speed:	36.07 hp 26.9 kW
Fuel use:	3.0 gal/hour 11.4 l/hour
Drawbar performance
Max power:	33.1 hp 24.7 kW
Max pull:	4,266 lbs 1935 kg
Gear 1 used for pull test.

Farmall M Engines

Farmall M Engines International Harvester 4.1L 4-cyl distillate International Harvester 4.1L 4-cyl gasoline Fuel tank:21 gal
79.5 L
Aux. fuel:1 gal
3.8 L
Engine details ...

1939 - 1954

Row-Crop tractor

Series:

Series:	H ←	M
		Super M ↓

Engines overview

Engines overview
International Harvester 4.1L 4-cyl distillate
International Harvester 4.1L 4-cyl gasoline

Engine Detail

Engine Detail
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 0.330 mm
Intake valve clearance:	0.017 inches 0.432 mm *Hot
Exhaust valve clearance:	0.017 inches 0.432 mm *Hot

Engine Detail

Engine Detail
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

Mechanical

Mechanical Chassis:4x2 2WD
Steering:manual
Brakes:mechanical contracting band
Cab:Open operator station.
Transmission:5-speed sliding gear
Transmission details ...

1939 - 1954

Row-Crop tractor

Series:

Series:	H ←	M
		Super M ↓

Transmission

Transmission
Type:	sliding gear
Gears:	5 forward and 1 reverse

Speeds

Speeds

Hydraulics

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

Power Take-off (PTO)

Power Take-off (PTO) Rear RPM:540 (1.375)

Dimensions & Tires

Dimensions & Tires Weight:4858 lbs
2203 kg
Front tire:6.00-16
Rear tire:11-38
Full dimensions and tires ...

1939 - 1954

Row-Crop tractor

Series:

Series:	H ←	M
		Super M ↓

Farmall M Tires

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

Dimensions
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

M Serial Numbers

M Serial Numbers Location:Data plate on the left side of the engine area.
photo of M serial number
1939:FBK501
1940:FBK7240
1941:FBK25371
1942:FBK50988
1943:FBK60011
1944:FBK67424
1945:FBK88085
1946:FBK105564
1947:FBK122823
1948:FBK151708
1949:FBK180514
1950:FBK213579
1951:FBK247518
1952:FBK290923
Final:FBK298218

how to read serial numbers...