Allis Chalmers 20-35

The Allis Chalmers 20-35 is a tractor produced by Allis Chalmers. It is equipped with a 460.7 ci 7.6 L engine. The rated power output is 44.29 hp 33.0 kW. Transmission: 2 forward and 1 reverse. Operating weight: 6640 lbs 3011 kg.

Overview

	1922 - 1930 Standard-tread tractor
1922 - 1930
Standard-tread tractor

Production
Manufacturer	Allis Chalmers
Standard-tread tractor
Built in West Allis, Wisconsin, USA
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.

Allis Chalmers 20-35 Engine
Allis Chalmers 7.6L 4-cyl gasoline
Fuel tank	25 gal 94.6 L
Aux. fuel	7.75 gal 29.3 L
Engine details ...

Allis Chalmers 20-35 Transmission
2-speed unsynchronized gear
Transmission details ...

Allis Chalmers 20-35 Power
Drawbar (claimed)	20 hp 14.9 kW
Belt (claimed)	35 hp 26.1 kW
Drawbar (tested)	33.20 hp 24.8 kW
Belt (tested)	44.29 hp 33.0 kW
Performance test details ...

Mechanical
Two-wheel drive
Manual steering
Open operator station.

Dimensions & Tires
Weight	6640 lbs 3011 kg
Front tire	36x6
Rear tire	50x12
Full dimensions and tires ...

Belt Pulley
Diameter	13 inches 33 cm
Width	8.5 inches 21 cm
RPM	930

References
20-35 Tractors published in 1929, by Allis Chalmers

Engine

Engine Detail — 460.7 ci / 7.6 L Gasoline

Manufacturer	Allis Chalmers
Fuel Type	Gasoline
Configuration	4-cylinder, liquid-cooled vertical valve-in-head
Displacement	460.7 ci 7.6 L
Bore/Stroke	4.75x6.50 inches 121 x 165 mm
Fuel system	Kingston L 1.5" carburetor
Air cleaner	oil bath
Rated RPM	930
Coolant capacity	40 qts 37.9 L

Transmission

Transmission — 2 forward and 1 reverse unsynchronized gear

Type	unsynchronized gear
Gears	2 forward and 1 reverse
Clutch	hand-operated expanding shoe

Dimensions

Allis Chalmers 20-35 Tires
Ag front	36x6 steel
Ag rear	50x12 steel

Dimensions
Length	135 inches 342 cm
Width	66 inches 167 cm
Height	68 inches 172 cm
Weight	6640 lbs 3011 kg

Tests

Tractor Tests
NTTL 83: gasoline 2-speed 2WD
NTTL 151: gasoline 2-speed 2WD

Nebraska Tractor Test 83
Gasoline 2-speed 2WD September 15 - 24, 1921 Link: Nebraska Tractor Test 83 file
Belt power (max)	43.73 hp 32.6 kW
Belt fuel use (max)	4.7 gal/hour 17.8 l/hour
Drawbar performance
Max power	25.45 hp 19.0 kW
Max pull	3075 lbs 1394 kg

Nebraska Tractor Test 151
Gasoline 2-speed 2WD June 19 - 26, 1928 Link: Nebraska Tractor Test 151 file
Belt power (max)	44.29 hp 33.0 kW
Belt fuel use (max)	5.0 gal/hour 18.9 l/hour
Drawbar performance
Max power	33.20 hp 24.8 kW
Max pull	4,400 lbs 1995 kg

Photos

Allis Chalmers 20-35

New Allis-Chalmers 20-35 for sale in 1928 in Wells, Minnesota with Jens Arneson and partner.

Allis-Chalmers 20-35, left side.

Allis-Chalmers 20-35, front view.