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Allis Chalmers B

Allis Chalmers B tractor
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The Allis-Chalmers model B was designed in the early 1930s to serve the small-farm market, focusing on farms under 100 acres. It was produced from 1938 to 1957 as a row-crop tractor, with a total of 120,783 units built. The tractor featured several engine options including Allis-Chalmers and Waukesha 4-cylinder gasoline engines, a 3-speed unsynchronized transmission, and was capable of pulling one 16-inch plow. It had a two-wheel drive with manual steering and differential mechanical contracting band brakes. The operator station was open with an optional canvas cab. The tractor had a rear PTO and used the Allis Snap Coupler hitch. Dimensions included a wheelbase of 73.4 inches and a shipping weight of 2060 lbs. Variants included the IB industrial tractor.
Allis Chalmers Btractorspecificationsenginetransmissiondimensionspowerrow-crop tractorfarm tractor
Power17 hp[B]
Founded1938 - 1957
ModelB

Technical Specifications

Detailed specifications and technical data for Allis Chalmers B

Power

Plows:1 (16-inch)
Belt (tested):22.25 hp (16.6 kW)
Drawbar (tested):19.51 hp (14.5 kW)

Engine

Waukesha:gasoline, 4-cylinder, liquid-cooled, Original engine, used in 1937 on the first 96 tractors built
Fuel tank:12 gal (45.4 L)
Engine Oil:Oil capacity 4 qts (3.8 L)
Point gap BE:0.020 inches (0.508 mm)
Point gap CE:0.020 inches (0.508 mm)
Rated RPM BE:1400
Rated RPM CE:1500
Sparkplug CE:Autolite AN 7; AC 45
Air cleaner CE:oil bath
Bore/Stroke BE:3.25x3.50 inches (83 x 89 mm)
Bore/Stroke CE:3.375x3.50 inches (86 x 89 mm)
Compression BE:4.92:1
Compression CE:5.75:1
Engine options:Allis-Chalmers 2.1L 4-cyl gasoline; Allis-Chalmers 1.9L 4-cyl gasoline; Waukesha 1.9L 4-cyl gasoline
Displacement BE:116.1 ci (1.9 L)
Displacement CE:125.2 ci (2.1 L)
Firing order BE:1-2-4-3
Firing order CE:1-2-4-3
Oil capacity CE:4 qts (3.8 L)
Sparkplug gap BE:0.040 inches (1.016 mm)
Sparkplug gap CE:0.035 inches (0.889 mm)
Starter volts CE:6
Allis-Chalmers BE:gasoline, 4-cylinder, liquid-cooled vertical I-head, Second engine, used until 1943, SN 64500
Allis-Chalmers CE:gasoline, 4-cylinder, liquid-cooled, Final engine, used from 1943 on, SN 64501
Rated RPM Waukesha:1400
Coolant capacity BE:8 qts (7.6 L)
Bore/Stroke Waukesha:3.00x4.00 inches (76 x 102 mm)
Displacement Waukesha:113 ci (1.9 L)
Intake valve clearance BE:0.010 inches (hot) (0.254 mm)
Intake valve clearance CE:0.010 inches (hot) (0.254 mm)
Exhaust valve clearance BE:0.010 inches (hot) (0.254 mm)
Exhaust valve clearance CE:0.010 inches (hot) (0.254 mm)

Variants

IB:industrial tractor

Electrical

Ground:positive
Battery volts:6
Charging amps:12
Charging system:generator

Mechanical

Drive:Two-wheel drive
Brakes:Differential mechanical contracting band brakes
Steering:manual
Operator station:Open operator station. Canvas cab optional.

Production

Category:Row-Crop tractor
Factories:West Allis, Wisconsin, USA; Southampton, England
Description: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.
Total built:120,783
Manufacturer:Allis Chalmers
Original price:$1,500 in 1957

Belt Pulley

RPM:1053
Width:5.5 inches (13 cm)
Diameter:8 inches (20 cm)

Transmission

Type:unsynchronized gear
Gears:3 forward and 1 reverse
Clutch:dry disc
Oil type:SAE140 above 32°F (0°C), SAE90 below 32°F (0°C)
Oil capacity:6 qts (5.7 L)

Tractor hitch

Type:Allis Snap Coupler

Serial Numbers

Location:On top of transmission case, by shift lever. English-built models have an 'EB' serial number.
B Serial Numbers: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
EB Serial Numbers:1951: 4001; 1952: 6861; 1953: 9200; 1954: 11120
IB Serial Numbers:1946: 1001; 1947: 1003; 1948: 1010; 1949: 1282; 1950: 1556; 1951: 1879; 1952: 2219; 1953: 2570

Dimensions & Tires

Width:52.7 inches (minimum) (133 cm); 62 inches (maximum) (157 cm)
Length:110.25 inches (280 cm)
Rear tire:9-24; 10-24; 7-28 (Potato Special); 8-38 (Asparagus Special)
Wheelbase:73.4 inches (186 cm)
Front tire:4.00-15
Rear tread:40 to 52 inches (101 to 132 cm); 40 to 60 inches (101 to 152 cm)
Front tread:42 inches (106 cm); 38 to 60 inches (96 to 152 cm)
Shipping weight:2060 lbs (934 kg)
Ballasted weight:4193 lbs (1901 kg)
Ground clearance:21.75 inches (55 cm); 28 inches (Asparagus Special) (71 cm)
Height (exhaust):76.75 inches (194 cm)

Power Take-off (PTO)

Rear PTO:transmission
Rear PTO Type:560