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Farmall B Specs ( 1939-1947 )

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Production

Description Row-Crop tractor / The Farmall A and B were nearly identical tractors. The A featured an offset engine and wide front end. The B had a centered engine, seat offset to the right, and narrow front end.
Factories Chicago, Illinois, USA
Manufacturer Farmall (a part of International Harvester)
Original price $770
Total built 75,241

Engine

Bore/Stroke 3.00x4.00 inches (76 x 102 mm) / 3.00x4.00 inches (76 x 102 mm)
Compression 5.33:1
Coolant capacity 13.5 qts (12.8 L) / 13.5 qts (12.8 L)
Description International Harvester C113 / gasoline / 4-cylinder / liquid-cooled inline / International Harvester / kerosene / 4-cylinder / liquid-cooled vertical I-head
Displacement 113.1 ci (1.9 L) / 113.1 ci (1.9 L)
Exhaust valve clearance 0.014 inches (hot) (0.356 mm) / 0.014 inches (hot) (0.356 mm)
Firing order 1-3-4-2 / 1-3-4-2
Idle RPM 900-1400
Intake valve clearance 0.014 inches (hot) (0.356 mm) / 0.014 inches (hot) (0.356 mm)
Oil capacity 5 qts (4.7 L) / 5 qts (4.7 L)
Point gap 0.020 inches (0.508 mm) / 0.020 inches (0.508 mm)
Rated RPM 1400 / 1400
Sparkplug gap 0.025 inches (0.635 mm) / 0.025 inches (0.635 mm)
Starter manual / manual
Starter volts 6 / 6
Engine type International Harvester 1.9L 4-cyl gasoline / International Harvester 1.9L 4-cyl kerosene
Aux. fuel 1 gal (3.8 L)
Engine type International Harvester 1.9L 4-cyl gasoline / International Harvester 1.9L 4-cyl kerosene
Fuel tank 10 gal (37.9 L)
Belt (claimed) 19.22 hp (14.3 kW)
Belt (tested) 18.39 hp (13.7 kW)
Drawbar (claimed) 17.31 hp (12.9 kW)
Drawbar (tested) 16.21 hp (12.1 kW)
Plows 1 *16 inch

Transmission

Gears 4 forward and 1 reverse
Transmission International Harvester
Transmission type 4-speed gear
Type gear

Mechanical

Cab Open operator station.
Description Manual steering / Mechanical contracting band brakes
Drive type Two-wheel drive

Hitch

Type IH Pneumatic Lift-All

PTO

Rear PTO transmission
Rear PTO Type 540 (1.125)

Electrical

Battery volts 6
Charging system generator
Ground positive

Dimensions & Tires

Height 65 inches (165 cm)
Length 108 inches (274 cm)
Rear tread 64/68/72/76 inches (wheel in) (162/172/182/193 cm) / 80/84/88/92 inches (wheel out) (203/213/223/233 cm)
Weight 2400 lbs (1088 kg)
Width 79.5 inches (201 cm)
Front tire 6.00-12
Rear tire 8-24
Weight 2400 lbs (1088 kg)
Ag front 6.00-12 / 4.00-15
Ag rear 8-24 / 9-24

B Serial Number Location

Description Seat support bracket

B Serial Numbers

1939 FAB3675
1940 6744
1941 41500
1942 80739
1944 96390
1945 113218
1946 146700
1947 182964 (Chicago) / 200001 (Louisville)
Description FAQ: How to read a serial number table.

Belt Pulley

Diameter 8.5 inches (21 cm)
RPM 1157
Speed 2574 ft/min (784.56 meters/min)
Width 6 inches (15 cm)

Nebraska Tractor Test 331

Belt fuel use (max) 1.6 gal/hour (6.1 l/hour)
Belt power (max) 18.39 hp (13.7 kW)
Description Gasoline 4-speed 2WDSeptember 25 - 29, 1939Link: Nebraska Tractor Test 331 file / Drawbar performance / Gear 2 used for power test. / Gear 1 used for pull test.
Max power 16.21 hp (12.1 kW)
Max pull 2,377 lbs (1078 kg)

Nebraska Tractor Test 332

Belt fuel use (max) 1.4 gal/hour (5.3 l/hour)
Belt power (max) 16.00 hp (11.9 kW)
Description Distillate 4-speed 2WDOctober 9 - 13, 1939Link: Nebraska Tractor Test 332 file / Drawbar performance / Gear 2 used for power test. / Gear 1 used for pull test.
Fuel use 1.2 gal/hour (4.5 l/hour)
Max power 14.73 hp (11.0 kW)
Max pull 2,463 lbs (1117 kg)

References

Description Farmall Letter Series Tractors by Lee Klancher / The Farmall System of Farming published in 1946, by International Harvester

Tractor Tests

Description NTTL 331: gasoline 4-speed 2WD / NTTL 332: distillate 4-speed 2WD

Variants

B full width
BN narrow tread