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Farmall B vs Farmall BN
Verdict: Farmall B vs Farmall BN
The Farmall B and the Farmall BN are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 17 hp. Farmall BN is the lighter machine (816 kg vs 1,088 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Farmall BN is the newer design (1940 vs 1939). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.
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Fit & specs
Farmall
62
Fit score
Best match
Clear
Farmall
62
Fit score
Best match
Clear
Rated power
17 hp
17 hp
Confidence
40%
40%
Guide price
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—
Overview
Manufacturer
Farmall (a part of International Harvester)Reference
Farmall (a part of International Harvester)Reference
Distillate 4-speed 2WDOctober 9 - 13, 1939Link: Nebraska Tractor Test 332 fileReference
liquid-cooled inlineReference
Factories
Louisville, Kentucky, USAReference
Louisville, Kentucky, USAReference
Total built
75,241Reference
14,967Reference
Original price
$770Reference
—
Variants
B
full widthReference
full widthReference
BN
narrow treadReference
narrow treadReference
Engine
Fuel tank
37.9 LReference
37.9 LReference
Aux. fuel
3.8 LReference
3.8 LReference
Drawbar (claimed)
12.9 kWReference
12.7 kWReference
Belt (claimed)
14.3 kWReference
14.2 kWReference
Plows
1Reference
1Reference
Drawbar (tested)
12.1 kWReference
—
Belt (tested)
13.7 kWReference
—
Displacement
1.9 LReference
1.9 LReference
Bore/Stroke
76 x 102 mmReference
76 x 102 mmReference
Compression
5.33:1Reference
5.33:1Reference
Rated RPM
1400Reference
1400Reference
Idle RPM
900-1400Reference
900-1400Reference
Firing order
1-3-4-2Reference
1-3-4-2Reference
Starter
electricReference
electricReference
Starter volts
6Reference
6Reference
Oil capacity
4.7 LReference
4.7 LReference
Coolant capacity
12.8 LReference
—
Sparkplug gap
0.635 mmReference
—
Point gap
0.508 mmReference
—
Intake valve clearance
0.356 mmReference
—
Exhaust valve clearance
0.356 mmReference
—
Belt power (max)
11.9 kWReference
—
Max power
11.0 kWReference
—
Transmission
Transmission
International HarvesterReference
International HarvesterReference
Gears
4 forward and 1 reverseReference
4 forward and 1 reverseReference
PTO & Hydraulics
Type
gearReference
gearReference
Rear PTO
transmissionReference
transmissionReference
Rear PTO Type
540 (1.125)Reference
540 (1.125)Reference
Dimensions
Weight
1088 kgReference
816 kgReference
Front tire
6.00-12Reference
6.00-12Reference
Rear tire
8-24Reference
8-24Reference
Ag front
7.50-10Reference
7.50-10Reference
Ag rear
5-30Reference
5-30Reference
Length
274 cmReference
273 cmReference
Height
165 cmReference
—
Rear tread
203/213/223/233 cmReference
142 to 213 cmReference
Wheelbase
—
184 cmReference
Height (steering wheel)
—
165 cmReference
B Serial Number Location
B Serial Numbers
1939
FAB3675Reference
—
1940
6744Reference
FABN39715Reference
1941
41500Reference
—
1942
80739Reference
—
1944
96390Reference
—
1945
113218Reference
—
1946
146700Reference
—
1947
200001 (Louisville)Reference
—
Capacities
Diameter
21 cmReference
21 cmReference
Width
201 cmReference
15 cmReference
RPM
1157Reference
1157Reference
Speed
784.56 meters/minReference
784.56 meters/minReference
Electrical
Ground
positiveReference
positiveReference
Charging system
generatorReference
generatorReference
Battery volts
6Reference
6Reference
Test results
Belt fuel use (max)
5.3 l/hourReference
—
Max pull
1117 kgReference
—
Fuel use
4.5 l/hourReference
—
BN Serial Number Location
BN Serial Numbers
Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.