Caterpillar R3 Specs ( 1934-1935 )
Overview
The Caterpillar R3 is an agricultural crawler tractor produced between 1934 and 1935 as a special-order machine for the US Government. This model is equipped with a 5.7L 4-cylinder gasoline engine, a 3-speed gear transmission, and an open operator station. Production was limited to 60 total units manufactured in Peoria, Illinois.
Ideal Applications
Tested Performance Results:
In Nebraska Tractor Test 227, the tractor achieved a maximum belt power of 41.99 hp and a maximum drawbar pull of 7,622 lbs.
Engine Specifications:
The 350 ci liquid-cooled gasoline engine features an Ensign carburetor, an oil bath air cleaner, and a rated speed of 1100 RPM.
Transmission and Drive:
The crawler drive system utilizes a dry disc clutch and a gear transmission providing three forward gears and one reverse gear.
Production
| Description | Agricultural Crawler tractor / Built in Peoria, Illinois, USA / The R3 was a special-order machine for the US Government, based on the Twenty-Eight. |
|---|---|
| Manufacturer | Caterpillar |
| Total built | 60 |
Engine
| Engine type | Caterpillar 5.7L 4-cyl gasoline |
|---|---|
| Air cleaner | oil bath |
| Bore/Stroke | 4.50x5.50 inches (114 x 140 mm) |
| Description | Caterpillar / gasoline / 4-cylinder / liquid-cooled |
| Displacement | 350 ci (5.7 L) |
| Fuel system | Ensign carburetor |
| Rated RPM | 1100 |
| Belt (tested) | 41.99 hp (31.3 kW) |
| Drawbar (tested) | 34.44 hp (25.7 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 |
Dimensions & Tracks
| Description | Tracks |
|---|
Nebraska Tractor Test 227
| Belt fuel use (max) | 4.9 gal/hour (18.5 l/hour) |
|---|---|
| Belt power (max) | 41.99 hp (31.3 kW) |
| Description | Gasoline 3-speed crawlerSeptember 26 - October 15, 1934Link: Nebraska Tractor Test 227 file / Drawbar performance / Gear 2 used for power test. / Gear 1 used for pull test. |
| Max power | 34.44 hp (25.7 kW) |
| Max pull | 7,622 lbs (3457 kg) |