Caterpillar Twenty Specs ( 1927-1931 )
Overview
The Caterpillar Twenty is a durable agricultural crawler tractor produced from 1927 to 1931, designed for heavy-duty farm work with a focus on traction and pulling power. Testing at the Nebraska Tractor Test 150 demonstrated its capabilities, recording a maximum drawbar pull of 5721 lbs and a maximum belt power of 29.49 hp. This model features a liquid-cooled 4.5L four-cylinder gasoline engine and a three-speed gear transmission to handle various field demands.
Ideal Applications
High-Traction Field Tasks:
Utilizing its crawler drive and 7700 lb operating weight, this tractor is built for applications requiring significant grip and a maximum drawbar pull of 5721 lbs.
Stationary Machinery Power:
The dedicated belt drive provides a tested maximum of 29.49 hp, allowing the tractor to power external agricultural equipment at a rated 1100 RPM.
General Agricultural Cultivation:
With three forward gears and a 26.32 hp drawbar capacity, this crawler is suited for a variety of farm tasks requiring consistent power across different speeds.
Production
| Description | Agricultural Crawler tractor / In 1931, the Caterpillar was renamed the Twenty-Five due to increased engine output. |
|---|---|
| Factories | San Leandro, California, USA |
| Manufacturer | Caterpillar |
Engine
| Engine type | Caterpillar 4.5L 4-cyl gasoline |
|---|---|
| Air cleaner | oil bath |
| Bore/Stroke | 4.00x5.50 inches (102 x 140 mm) |
| Description | Caterpillar / gasoline / 4-cylinder / liquid-cooled |
| Displacement | 277 ci (4.5 L) |
| Rated RPM | 1100 |
| Belt (tested) | 29.49 hp (22.0 kW) |
| Drawbar (tested) | 26.32 hp (19.6 kW) |
Transmission
| Gears | 3 forward and 1 reverse |
|---|---|
| Transmission type | 3-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Drive | crawler |
Dimensions & Tires
| Operating weight | 7700 lbs (3492 kg) |
|---|
Dimensions & Tracks
| Description | Tracks |
|---|---|
| Weight | 7700 lbs (3492 kg) |
Nebraska Tractor Test 150
| Belt fuel use (max) | 3.3 gal/hour (12.5 l/hour) |
|---|---|
| Belt power (max) | 29.49 hp (22.0 kW) |
| Description | Gasoline 3-speed crawlerMay 17 - 28, 1928Link: Nebraska Tractor Test 150 file / Drawbar performance / Gear 1 used for power test. / Gear 1 used for pull test. |
| Max power | 26.32 hp (19.6 kW) |
| Max pull | 5721 lbs (2595 kg) |