Allis-Chalmers 18-30 Specs ( 1918-1921 )
Overview
The Allis-Chalmers 18-30 is a 2WD farm tractor produced from 1918 to 1921 in West Allis, Wisconsin, with approximately 1,160 units manufactured. It features an Allis Chalmers 7.6L 4-cylinder liquid-cooled vertical valve-in-head engine, an open operator station, and steel wheels as standard equipment. This model was originally designated the 15-30 but was renamed following Nebraska Tractor Test 55 results.
Ideal Applications
Tested Power Output:
According to Nebraska Tractor Test 55, the tractor achieved a maximum belt power of 33.41 hp and a maximum drawbar pull of 3,500 lbs.
Transmission and Drive Configuration:
The mechanical setup consists of a two-speed unsynchronized gear transmission with one reverse gear and a hand-operated expanding shoe clutch.
Physical Dimensions and Capacity:
The unit weighs 6,150 lbs and is equipped with a 25-gallon main fuel tank plus a 7.75-gallon auxiliary tank to support its 460.7 ci gasoline engine.
Production
| Description | Standard-tread tractor / Built in West Allis, Wisconsin, USA / Original price was $1,785 in 1919 / Originally named the Allis-Chalmers 15-30, the tractor was renamed 18-30 after the first Nebraska test. |
|---|---|
| Manufacturer | Allis Chalmers |
| Total built | 1160 |
Engine
| Aux. fuel | 7.75 gal (29.3 L) |
|---|---|
| Engine type | Allis Chalmers 7.6L 4-cyl gasoline |
| Fuel tank | 25 gal (94.6 L) |
| Air cleaner | oil bath |
| Bore/Stroke | 4.75x6.50 inches (121 x 165 mm) |
| Coolant capacity | 40 qts (37.9 L) |
| Description | Allis Chalmers / gasoline / 4-cylinder / liquid-cooled vertical valve-in-head |
| Displacement | 460.7 ci (7.6 L) |
| Fuel system | Kingston L 1.5" carburetor |
| Rated RPM | 830 |
| Belt (claimed) | 30 hp (22.4 kW) |
| Belt (tested) | 33.41 hp (24.9 kW) |
| Drawbar (claimed) | 18 hp (13.4 kW) |
| Drawbar (tested) | 20.55 hp (15.3 kW) |
| Plows | 3 |
Transmission
| Clutch | hand-operated expanding shoe |
|---|---|
| Gears | 2 forward and 1 reverse |
| Transmission type | 2-speed unsynchronized gear |
| Type | unsynchronized gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Drive type | Two-wheel drive |
Dimensions & Tires
| Ag front | 36x6 steel |
|---|---|
| Ag rear | 50x12 steel |
| Height | 68 inches (172 cm) |
| Length | 135 inches (342 cm) |
| Weight | 6150 lbs (2789 kg) |
| Width | 66 inches (167 cm) |
| Front tire | 36x6 |
| Rear tire | 50x12 |
| Weight | 6150 lbs (2789 kg) |
18-30 Serial Numbers
| ---- | 5006 |
|---|---|
| 1919 | 5000 |
| 1920 | 5161 |
| 1921 | 6015 |
| 1922 | ???? |
| Description | FAQ: How to read a serial number table. |
| Location: | front of shifter on transmission case |
Belt Pulley
| Diameter | 13 inches (33 cm) |
|---|---|
| RPM | 930 |
| Width | 8.5 inches (21 cm) |
Nebraska Tractor Test 55
| Belt fuel use (max) | 4.6 gal/hour (17.4 l/hour) |
|---|---|
| Belt power (max) | 33.41 hp (24.9 kW) |
| Description | Gasoline 2-speed 2WDAugust 23 - September 6, 1920Link: Nebraska Tractor Test 55 file / Drawbar performance |
| Fuel use | 3.5 gal/hour (13.2 l/hour) |
| Max power | 20.55 hp (15.3 kW) |
| Max pull | 3,500 lbs (1587 kg) |
References
| Description | 18-30 4 Plow Tractor With Surplus Power published in 1921, by Allis Chalmers |
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