Search/Industrial Tractor/Allis Chalmers/HD-21 Series B

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Industrial Tractor · 1969Unverified

Allis Chalmers HD-21 Series B

Name: Allis Chalmers HD-21 Series B
Brand: Allis Chalmers

Allis Chalmers HD-21 Series B — Industrial Crawler tractor · 273 hp. Reference specifications; pending source verification.

The Allis Chalmers HD-21 Series B is an industrial tractor with a rating of approximately 273 horsepower, placing it at the upper end of its class in terms of power output. Produced from 1969 to 1974, it features a 6-cylinder turbocharged diesel liquid-cooled engine, paired with a tracked undercarriage and powershift transmission. The HD-21 Series B is suitable for operations of 1,500 acres or more.

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

Rated power

273 hp

Catalogue coverage

Variants represented

Richest spec table

21 rows

Recorded power

273 hp

Transmissions

2-speed power shift

Production years

1969-1974

Verified variants

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

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Overview

ManufacturerAllis ChalmersReference

Industrial Crawler tractorReference

DrivecrawlerReference

Open operator station.Reference

Engine

Allis Chalmers 13.8L 6-cyl dieselReference

Engine203.6 kWReference

Allis Chalmers 21000 IIReference

turbocharged dieselReference

6-cylinderReference

liquid-cooledReference

Displacement13.8 LReference

Bore/Stroke133 x 165 mmReference

Power203.6 kWReference

StarterelectricReference

Starter volts24Reference

Transmission

2-speed power shiftReference

Typepower shiftReference

Gears2 forward and reverseReference

Dimensions

TracksReference

Electrical

Charging systemalternatorReference

Charging amps20Reference

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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