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Tractor · 1951Unverified

Allis Chalmers HD9

Name: Allis Chalmers HD9
Brand: Allis Chalmers

Allis Chalmers HD9 — Agricultural Crawler tractor · 70 hp. Reference specifications; pending source verification.

The Allis Chalmers HD9 is a tractor with a rated power output of 70 hp, positioning it within the middle range of its class. Manufactured from 1951 to 1955, the HD9 features a 4-cylinder diesel liquid-cooled engine, coupled to a 6-speed gearbox and a tracked undercarriage. The listed weight of the tractor is 8527 kg, and it is suitable for tasks on land areas of approximately 200 acres.

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

Rated power

70 hp

Max power

50.3 kW

Weight

8527 kg

Catalogue coverage

Variants represented

Richest spec table

52 rows

Recorded power

70 hp

Recorded weight

8527 kg

Transmissions

6-speed gear

Production years

1951-1955

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 built5,850Reference

DrivecrawlerReference

Open operator station.Reference

Engine

General Motors 4.7L 4-cyl dieselReference

Fuel tank208.2 LReference

Drawbar (claimed)52.2 kWReference

Belt (claimed)62.6 kWReference

Drawbar (tested)50.3 kWReference

Belt (tested)59.0 kWReference

General MotorsReference

blower dieselReference

4-cylinderReference

liquid-cooled 2-cycle vertical I-headReference

Displacement4.7 LReference

Bore/Stroke108 x 127 mmReference

Compression16.0:1Reference

Rated RPM1600Reference

Starter volts12Reference

Oil capacity15.1 LReference

Coolant capacity27.4 LReference

Belt power (max)59.0 kWReference

Max power50.3 kWReference

Transmission

6-speed gearReference

TypegearReference

Gears6 forward and 3 reverseReference

Oil capacity25.6 LReference

Dimensions

Weight8527 kgReference

16-inch tracksReference

Length381 cmReference

Width241 cmReference

Height185 cmReference

Shipping weight8527 kgReference

Gauge187 cmReference

HD9 Serial Numbers

Location:Steering clutch housing or instrument panelReference

19501Reference

19512Reference

1952738Reference

19531883Reference

19543591Reference

19555209Reference

Final5850Reference

FAQ: How to read a serial number table.Reference

Allis Chalmers HD9 Tracks

Width40 cmReference

Width50 cmReference

Test results

Diesel 6-speed crawlerJuly 17 - 28, 1951Link: Nebraska Tractor Test 463 fileReference

Drawbar performanceReference

Gear 2 used for power test.Reference

Max pull8634 kgReference

Gear 1 used for pull test.Reference

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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