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Tractor · 1922Unverified

Allis Chalmers 20-35

Name: Allis Chalmers 20-35
Brand: Allis Chalmers

Allis Chalmers 20-35 — Standard-tread tractor · 20 hp. Reference specifications; pending source verification.

The Allis Chalmers 20-35 is a compact tractor with a rated engine power of 20 hp. Manufactured from 1922 to 1930, it features a 4-cylinder petrol liquid-cooled engine, transmitting power through a 2-speed gearbox to two-wheel drive. The tractor's listed weight is 3011 kg, suitable for tasks covering 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

20 hp

Max power

19.0 kW

Weight

3011 kg

Catalogue coverage

Variants represented

Richest spec table

64 rows

Recorded power

20 hp

Recorded weight

3011 kg

Transmissions

2-speed unsynchronized gear

Production years

1922-1930

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

Standard-tread tractorReference

Built in West Allis, Wisconsin, USAReference

When the Allis-Chalmers E 18-30 was re-tested in 1921 at 930 RPM, it produced a rated 38 belt horsepower. The tractor was re-named the 20-35.Reference

Two-wheel driveReference

Manual steeringReference

Open operator station.Reference

Engine

Allis Chalmers 7.6L 4-cyl gasolineReference

Fuel tank94.6 LReference

Aux. fuel29.3 LReference

Drawbar (claimed)14.9 kWReference

Belt (claimed)26.1 kWReference

Plows4Reference

Drawbar (tested)24.8 kWReference

Belt (tested)33.0 kWReference

Allis ChalmersReference

gasolineReference

4-cylinderReference

liquid-cooled vertical valve-in-headReference

Displacement7.6 LReference

Bore/Stroke121 x 165 mmReference

Fuel systemKingston L 1.5" carburetorReference

Air cleaneroil bathReference

Rated RPM930Reference

Coolant capacity37.9 LReference

Belt power (max)32.6 kWReference

Max power19.0 kWReference

Belt power (max)33.0 kWReference

Max power24.8 kWReference

Transmission

2-speed unsynchronized gearReference

Typeunsynchronized gearReference

Gears2 forward and 1 reverseReference

Clutchhand-operated expanding shoeReference

Dimensions

Weight3011 kgReference

Front tire36x6Reference

Rear tire50x12Reference

Ag front36x6 steelReference

Ag rear50x12 steelReference

Length342 cmReference

Width167 cmReference

Height172 cmReference

20-35 Serial Numbers

Location:Serial number on a plate in front of the steering wheel until 1927. After, the serial number is front of shifter on transmission case.Reference

19236161Reference

19246397Reference

19256755Reference

19267369Reference

19278070Reference

19289870Reference

192916762Reference

193023252Reference

Final24185Reference

FAQ: How to read a serial number table.Reference

Capacities

Diameter33 cmReference

Width21 cmReference

RPM930Reference

Test results

NTTL 83: gasoline 2-speed 2WDReference

NTTL 151: gasoline 2-speed 2WDReference

Gasoline 2-speed 2WDSeptember 15 - 24, 1921Link: Nebraska Tractor Test 83 fileReference

Belt fuel use (max)17.8 l/hourReference

Drawbar performanceReference

Max pull1394 kgReference

Gasoline 2-speed 2WDJune 19 - 26, 1928Link: Nebraska Tractor Test 151 fileReference

Belt fuel use (max)18.9 l/hourReference

Max pull1995 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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