Allis Chalmers 18-30: all source data

All 42 values recorded for this model, as the source lists them and in its units. The spec sheet shows the same data checked, typed and converted.

Overview

Production
Manufacturer	Allis Chalmers
(no label)	Standard-tread tractor
(no label)	Built in West Allis, Wisconsin, USA
Total built	1160
(no label)	Original price was $1,785 in 1919
(no label)	Originally named the Allis-Chalmers 15-30, the tractor was renamed 18-30 after the first Nebraska test.

Engine
(no label)	Allis Chalmers 7.6L 4-cyl gasoline
Fuel tank	25 gal \| 94.6 L
Aux. fuel	7.75 gal \| 29.3 L

Transmission
(no label)	2-speed unsynchronized gear

Power
Drawbar (claimed)	18 hp \| 13.4 kW
Belt (claimed)	30 hp \| 22.4 kW
Plows	3
Drawbar (tested)	20.55 hp \| 15.3 kW
Belt (tested)	33.41 hp \| 24.9 kW

Mechanical
(no label)	Two-wheel drive
(no label)	Open operator station.

Dimensions
Weight	6150 lbs \| 2789 kg
Front tire	36x6
Rear tire	50x12

Belt pulley
Diameter	13 inches \| 33 cm
Width	8.5 inches \| 21 cm
RPM	930

Engine

Engine detail
(no label)	Allis Chalmers
(no label)	gasoline
(no label)	4-cylinder
(no label)	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	830
Coolant capacity (Coolant)	40 qts \| 37.9 L

Transmission

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

Dimensions

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	6150 lbs \| 2789 kg