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Allis Chalmers IB

Allis Chalmers IB tractor
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The Allis Chalmers IB is an industrial tractor produced from 1939 to 1958. Based on the B farm tractor, the IB featured a heavier frame, front axle, and foot throttle. It was powered by either a 1.9L or 2.1L 4-cylinder gasoline engine and had a 3-speed non-synchronized transmission. The tractor had two-wheel drive with manual steering and differential mechanical contracting band brakes. It featured an open operator station and a generator charging system with a 6-volt battery. A total of 2,850 units were built.
Allis Chalmers IBindustrial tractor22.87 hp2.1L engine1.9L engine3-speed transmission19391958
Power-
Founded-
ModelIB

Technical Specifications

Detailed specifications and technical data for Allis Chalmers IB

Power

Belt (claimed):22.87 hp (17.1 kW)

Engine

Point gap:0.020 inches (0.508 mm)
Rated RPM:1500
Air cleaner:oil bath
Bore/Stroke:3.375x3.50 inches (86 x 89 mm)
Compression:5.75:1
Displacement:125.2 ci (2.1 L)
Firing order:1-2-4-3
Oil capacity:4 qts (3.8 L)
Sparkplug gap:0.035 inches (0.889 mm)
Starter volts:6
Engine options:Allis-Chalmers 2.1L 4-cyl gasoline, Allis-Chalmers 1.9L 4-cyl gasoline
Point gap 2nd engine:0.020 inches (0.508 mm)
Rated RPM 2nd engine:1400
Bore/Stroke 2nd engine:3.25x3.50 inches (83 x 89 mm)
Intake valve clearance:0.010 inches (hot) (0.254 mm)
Displacement 2nd engine:116.1 ci (1.9 L)
Exhaust valve clearance:0.010 inches (hot) (0.254 mm)
Firing order 2nd engine:1-2-4-3
Sparkplug gap 2nd engine:0.030 inches (0.762 mm)
Coolant capacity 2nd engine:8 qts (7.6 L)
Intake valve clearance 2nd engine:0.010 inches (hot) (0.254 mm)
Exhaust valve clearance 2nd engine:0.010 inches (hot) (0.254 mm)
Second engine used until 1943, SN 64500:-
Final engine used from 1943 on, SN 64501:-

Variants

B:farm tractor

Electrical

Battery volts:6
Charging system:generator

Mechanical

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

Production

Notes: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.
Total built:2,850
Manufacturer:Allis Chalmers

Transmission

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

Serial Numbers

1938:97
1939:11800
1940:33502
1941:49721
1942:56782
1943:64501
1944:65502
1945:70210
1946:IB1001
1947:IB1003
1948:IB1010
1949:IB1282
1950:IB1556
1951:IB1879
1952:IB2219
1953:IB2570
Location:Serial number stamped behind the gear shift lever, on top of the transmission case.