Caterpillar Twenty-Five Specs ( 1931-1933 )
Overview
The Caterpillar Twenty-Five is an agricultural crawler tractor manufactured in Peoria, Illinois, from 1931 to 1933. It is equipped with a 4.5L four-cylinder liquid-cooled gasoline engine and a three-speed gear transmission with a dry disc clutch. According to Nebraska Tractor Test 203, the model achieved a maximum tested drawbar pull of 6,011 lbs and a belt power output of 32.97 hp.
Ideal Applications
Nebraska Test Performance:
Tested performance data from 1932 recorded a maximum drawbar power of 27.11 hp and a fuel consumption rate of 3.4 gallons per hour at maximum belt power.
Engine and Mechanical Layout:
The powertrain consists of a 277 cubic inch gasoline engine with a 4.00x5.50 inch bore and stroke, operating at a rated 1100 RPM within an open operator station crawler chassis.
Transmission and Drive System:
The crawler drive is paired with a gear-type transmission providing three forward speeds and one reverse gear, utilizing a dry disc clutch for operation.
Production
| Description | Agricultural Crawler tractor / Built in Peoria, Illinois, USA / The Caterpillar Twenty-Five was, basically, a renamed Twenty. In 1933, the model was renamed again, to the Twenty-Eight. |
|---|---|
| Manufacturer | Caterpillar |
Engine
| Engine type | Caterpillar 4.5L 4-cyl gasoline |
|---|---|
| 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 (claimed) | 30 hp (22.4 kW) |
| Belt (tested) | 32.97 hp (24.6 kW) |
| Drawbar (claimed) | 26 hp (19.4 kW) |
| Drawbar (tested) | 27.11 hp (20.2 kW) |
Transmission
| Clutch | dry disc |
|---|---|
| Gears | 3 forward and 1 reverse |
| Transmission type | 3-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Drive | crawler |
Caterpillar Twenty-Five Tracks
| Size | 4 |
|---|
Dimensions & Tracks
| Description | Tracks |
|---|
Nebraska Tractor Test 203
| Belt fuel use (max) | 3.4 gal/hour (12.9 l/hour) |
|---|---|
| Belt power (max) | 32.97 hp (24.6 kW) |
| Description | Gasoline crawlerMay 16 - 23, 1932Link: Nebraska Tractor Test 203 file / Drawbar performance |
| Max power | 27.11 hp (20.2 kW) |
| Max pull | 6011 lbs (2726 kg) |