Allis Chalmers B tractor specifications

1938 - 1957

1938 - 1957 Row-Crop tractor

Production

Production Manufacturer:Allis Chalmers
Type:Row-Crop tractor
Factories:West Allis, Wisconsin, USA
Southampton, England
Total built:120,783
Original price:$1,500 (1957 )
The Allis-Chalmers model B was the result of research by Harry Merritt, Allis tractor division manager, into U.S. farm sizes in the early 1930s. At that time, most tractors were being used on farms larger than 100 acres, while more than half of all farms were under 100 acres. The Allis B was specifically designed to enter into the small-farm market, and early literature focused on the economy of using tractors instead of horses.

Variants

Variants IB:industrial tractor

1939 - 1958

Industrial tractor

Production

Production
Manufacturer	Allis Chalmers
Type	Industrial tractor
Total built	2,850
Allis-Chalmers model IB tractors built prior to 1946 shared serial numbers with the B farm tractors. Based on the B, the Allis IB industrial tractor featured a heavier frame, front axle, and foot throttle.

Allis Chalmers IB Engines

Allis Chalmers IB Engines
Allis-Chalmers 2.1L 4-cyl gasoline
Allis-Chalmers 1.9L 4-cyl gasoline
Engine details ...

Allis Chalmers IB Transmission

Allis Chalmers IB Transmission
3-speed non-synchronized gear
Transmission details ...

Mechanical

Mechanical
Chassis	4x2 2WD
Steering	manual
Brakes	differential mechanical contracting band
Cab	Open operator station.

Dimensions & Tires

Dimensions & Tires
Full dimensions and tires ...

Electrical

Electrical
Charging system	generator
Battery volts	6

Allis Chalmers B Power

Allis Chalmers B Power Plows:1 (16-inch)
Drawbar (tested):19.51 hp
14.5 kW
Belt (tested):22.25 hp
16.6 kW
power test details ...

1938 - 1957

Row-Crop tractor

Nebraska Tractor Test 302

Nebraska Tractor Test 302
116 ci gas 3-speed 2WD May 31 - June 8, 1938 Link: Nebraska Tractor Test 302 file
Belt power (max):	15.68 hp 11.7 kW
Belt fuel use (max):	1.5 gal/hour 5.7 l/hour
Drawbar performance
Max power:	12.97 hp 9.7 kW
Gear 2 used for power test.
Max pull:	1,473 lbs 668 kg
Gear 2 used for pull test.

Nebraska Tractor Test 439

Nebraska Tractor Test 439
125 ci gas 3-speed 2WD May 17 - 24, 1950 Link: Nebraska Tractor Test 439 file
Belt power (max):	22.25 hp 16.6 kW
Belt fuel use (max):	2.1 gal/hour 7.9 l/hour
Drawbar performance
Max power:	19.51 hp 14.5 kW
Gear 2 used for power test.
Max pull:	2,667 lbs 1209 kg
Gear 1 used for pull test.

Allis Chalmers B Engines

Allis Chalmers B Engines Allis-Chalmers 2.1L 4-cyl gasoline Allis-Chalmers 1.9L 4-cyl gasoline Waukesha 1.9L 4-cyl gasoline Fuel tank:12 gal
45.4 L
Engine details ...

1938 - 1957

Row-Crop tractor

Engines overview

Engines overview
Allis-Chalmers 2.1L 4-cyl gasoline
Allis-Chalmers 1.9L 4-cyl gasoline
Waukesha 1.9L 4-cyl gasoline

Engine Detail

Engine Detail
Allis-Chalmers CE
gasoline
4-cylinder
liquid-cooled
Final engine, used from 1943 on, SN 64501
Displacement:	125.2 ci 2.1 L
Bore/Stroke:	3.375x3.50 inches 86 x 89 mm
Air cleaner:	oil bath
Compression:	5.75:1
Rated RPM:	1500
Firing order:	1-2-4-3
Starter volts:	6
Oil capacity:	4 qts 3.8 L
Sparkplug:	Autolite AN 7
	AC 45
Sparkplug gap:	0.035 inches 0.889 mm
Point gap:	0.020 inches 0.508 mm
Intake valve clearance:	0.010 inches 0.254 mm (hot)
Exhaust valve clearance:	0.010 inches 0.254 mm (hot)

Engine Detail

Engine Detail
Allis-Chalmers BE
gasoline
4-cylinder
liquid-cooled vertical I-head
Second engine, used until 1943, SN 64500
Displacement:	116.1 ci 1.9 L
Bore/Stroke:	3.25x3.50 inches 83 x 89 mm
Compression:	4.92:1
Rated RPM:	1400
Firing order:	1-2-4-3
Coolant capacity:	8 qts 7.6 L
Sparkplug gap:	0.040 inches 1.016 mm
Point gap:	0.020 inches 0.508 mm
Intake valve clearance:	0.010 inches 0.254 mm (hot)
Exhaust valve clearance:	0.010 inches 0.254 mm (hot)

Engine Oil

Engine Oil

Oil capacity:	4 qts 3.8 L

Engine Detail

Engine Detail
Waukesha
gasoline
4-cylinder
liquid-cooled
Original engine, used in 1937 on the first 96 tractors built
Displacement:	113 ci 1.9 L
Bore/Stroke:	3.00x4.00 inches 76 x 102 mm
Rated RPM:	1400

Mechanical

Mechanical Chassis:4x2 2WD
Steering:manual
Brakes:differential mechanical contracting band
Cab:Open operator station. Canvas cab optional.
Transmission:3-speed unsynchronized gear
Transmission details ...

1938 - 1957

Row-Crop tractor

Transmission

Type:

unsynchronized gear

Gears:

3 forward and 1 reverse

Clutch:

dry disc

Oil capacity:

6 qts
5.7 L

Oil type:

32oF [0oC]↑	: SAE140
32oF [0oC]↓	: SAE90

32oF [0oC] ↑

32oF [0oC]↑	: SAE140
32oF [0oC]↓	: SAE90

Speeds

Speeds

Tractor hitch

Tractor hitch Type:Allis Snap Coupler

Power Take-off (PTO)

Power Take-off (PTO) Rear PTO:transmission
Rear RPM:560

Dimensions & Tires

Dimensions & Tires Wheelbase:73.4 inches
186 cm
Weight:2060 lbs
934 kg
Front tire:4.00-15
Rear tire:9-24
Full dimensions and tires ...

1938 - 1957

Row-Crop tractor

Allis Chalmers B Tires

Allis Chalmers B Tires
Ag front:	4.00-15
Ag rear:	9-24
Ag rear:	10-24
	7-28 (Potato Special)
	8-38 (Asparagus Special)

Dimensions

Dimensions
Wheelbase:	73.4 inches 186 cm
Length:	110.25 inches 280 cm
Width:	52.7 inches 133 cm (minimum)
	62 inches 157 cm (maximum)
Height (exhaust):	76.75 inches 194 cm
Shiping weight:	2060 lbs 934 kg
Ballasted weight:	4193 lbs 1901 kg
Ground clearance:	21.75 inches 55 cm
	28 inches 71 cm (Asparagus Special)
Front tread:	42 inches 106 cm
Front tread:	38 to 60 inches 96 to 152 cm
Rear tread:	40 to 52 inches 101 to 132 cm
Rear tread:	40 to 60 inches 101 to 152 cm

B Serial Numbers

B Serial Numbers Location:On top of transmission case, by shift lever. English-built models have an 'EB' serial number.
photo of B serial number
1938:97
1939:11800
1940:33502
1941:49721
1942:56782
1943:64501
1944:65502
1945:70210
1946:72265
1947:73370
1948:80556
1949:92295
1950:102393
1951:114527
1952:118674
1953:122310
1954:124201
1955:124711
1956:126497
1957:127186
Final:127461
1946:1001 (IB)
1947:1003 (IB)
1948:1010 (IB)
1949:1282 (IB)
1950:1556 (IB)
1951:1879 (IB)
1952:2219 (IB)
1953:2570 (IB)
1951:4001 (EB)
1952:6861 (EB)
1953:9200 (EB)
1954:11120 (EB)

how to read serial numbers...