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Tractor · 1951Unverified

Allis Chalmers HD20

Name: Allis Chalmers HD20
Brand: Allis Chalmers

Allis Chalmers HD20 — Agricultural Crawler tractor · 175 hp. Reference specifications; pending source verification.

The Allis Chalmers HD20 is a tractor rated at 175 hp, placing it among the higher-powered machines in its class. Manufactured from 1951 to 1954, the HD20 features a 6-cylinder diesel liquid-cooled engine, which drives the tractor's tracked undercarriage through a 2-speed gearbox. Weighing 18597 kg, the HD20 is designed for use on land areas ranging from 600 to 1,500 acres.

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

Rated power

175 hp

Max power

87.0 kW

Weight

18597 kg

Catalogue coverage

Variants represented

Richest spec table

44 rows

Recorded power

175 hp

Recorded weight

18597 kg

Transmissions

2-speed torque converter

Production years

1951-1954

Verified variants

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

Hover a source tag to verify

Overview

ManufacturerAllis ChalmersReference

Agricultural Crawler tractorReference

Built in Springfield, Illinois, USAReference

Total built3,100Reference

DrivecrawlerReference

Open operator station.Reference

Engine

General Motors 10.8L 6-cyl dieselReference

Fuel tank454.2 LReference

Engine (net)130.5 kWReference

Drawbar (claimed)87.2 kWReference

Drawbar (tested)87.0 kWReference

General MotorsReference

blower dieselReference

6-cylinderReference

liquid-cooled 2-cycle vertical I-headReference

Displacement10.8 LReference

Bore/Stroke127 x 142 mmReference

Power (net)130.5 kWReference

Compression18.0:1Reference

Rated RPM1700Reference

Starter volts24Reference

Coolant capacity56.8 LReference

Max power87.0 kWReference

Transmission

2-speed torque converterReference

Typetorque converterReference

Gears2 forward and 1 reverseReference

Dimensions

Weight18597 kgReference

24-inch tracksReference

Length485 cmReference

Width277 cmReference

Height241 cmReference

HD20 Serial Numbers

Location:Steering clutch housing or instrument panelReference

19513001Reference

19523828Reference

19534923Reference

19545737Reference

FAQ: How to read a serial number table.Reference

Allis Chalmers HD20 Tracks

Width60 cmReference

Length on ground270 cmReference

Area on ground3.3 m²Reference

Ground pressure0.6 barReference

Test results

Diesel 2-speed crawlerJuly 20 - August 3, 1951Link: Nebraska Tractor Test 465 fileReference

Drawbar performanceReference

Max pull18743 kgReference

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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