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Industrial Tractor · 1939Unverified

Allis Chalmers IB

Allis Chalmers IB — Industrial tractor · 23 hp. Reference specifications; pending source verification.

The Allis Chalmers IB is a compact industrial tractor model with a rating of 23 hp. Manufactured from 1939 to 1958, the IB is equipped with a 4-cylinder petrol liquid-cooled engine, which powers a two-wheel drive system with a 3-speed gearbox. The tractor is designed for tasks on land areas of up to 200 acres. The model's technical specifications are detailed below.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power
23 hp

Catalogue coverage

Variants represented
2
Richest spec table
64 rows
Recorded power
23 hp
Transmissions
3-speed non-synchronized gear
Production years
1939-1958
Verified variants
0

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

ManufacturerAllis ChalmersReference
Industrial tractorReference
Total built2,850Reference
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.Reference
Two-wheel driveReference
SteeringmanualReference
Differential mechanical contracting band brakesReference
Open operator station.Reference

Variants

Bfarm tractorReference

Engine

Allis-Chalmers 2.1L 4-cyl gasolineReference
Allis-Chalmers 1.9L 4-cyl gasolineReference
Belt (claimed)17.1 kWReference
Allis-ChalmersReference
gasolineReference
4-cylinderReference
liquid-cooledReference
Final engine, used from 1943 on, SN 64501Reference
Displacement2.1 LReference
Bore/Stroke86 x 89 mmReference
Air cleaneroil bathReference
Compression5.75:1Reference
Rated RPM1500Reference
Firing order1-2-4-3Reference
Starter volts6Reference
Oil capacity3.8 LReference
Sparkplug gap0.889 mmReference
Point gap0.508 mmReference
Intake valve clearance0.254 mmReference
Exhaust valve clearance0.254 mmReference
liquid-cooled vertical I-headReference
Second engine, used until 1943, SN 64500Reference
Displacement1.9 LReference
Bore/Stroke83 x 89 mmReference
Rated RPM1400Reference
Coolant capacity7.6 LReference
Sparkplug gap0.762 mmReference

Transmission

3-speed non-synchronized gearReference
Typenon-synchronized gearReference
Gears3 forward and 1 reverseReference
ClutchdryReference
Oil capacity5.7 LReference
Oil type[0oC]Reference
32oF [0oC]↑: SAE140Reference
32oF [0oC]↓: SAE90Reference

IB Serial Numbers

Location:Serial number stamped behind the gear shift lever, on top of the transmission case.Reference
193897Reference
193911800Reference
194033502Reference
194149721Reference
194256782Reference
194364501Reference
194465502Reference
194570210Reference
1946IB1001Reference
1947IB1003Reference
1948IB1010Reference
1949IB1282Reference
1950IB1556Reference
1951IB1879Reference
1952IB2219Reference
1953IB2570Reference
FAQ: How to read a serial number table.Reference

Electrical

Charging systemgeneratorReference
Battery volts6Reference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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