Caterpillar R3
The Caterpillar R3 is a tractor produced by Caterpillar. It is equipped with a 350 ci 5.7 L engine. The rated power output is 41.99 hp 31.3 kW. Transmission: 3 forward and 1 reverse. Drive type: crawler.
Engine Power
41.99 hp
31.3 kW
Drive & Traction
crawler
Fuel & Capacities
Gasoline
Transmission
3 forward and 1 reverse
Caterpillar R3 Serial Number & Year Decoder
Find the exact manufacture year of your tractor by checking your chassis serial number below.
Where to Find the Serial NumberThe serial number plate is commonly located on the front frame, tractor transmission housing (right side), or instrument panel badge.
Overview
 | 1934 - 1935
Agricultural Crawler tractor |
|---|---|
1934 - 1935 | |
Agricultural Crawler tractor | |
Production | |
|---|---|
Manufacturer | Caterpillar |
Agricultural Crawler tractor | |
Built in Peoria, Illinois, USA | |
Total built | 60 |
The R3 was a special-order machine for the US Government, based on the Twenty-Eight. | |
Caterpillar R3 Engine | |
|---|---|
Caterpillar 5.7L 4-cyl gasoline | |
Engine details ...  |
Caterpillar R3 Transmission | |
|---|---|
3-speed gear | |
Transmission details ...  |
Caterpillar R3 Power | |
|---|---|
Drawbar (tested) | 34.44 hp
25.7 kW |
Belt (tested) | 41.99 hp
31.3 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Drive | crawler |
Open operator station. | |
Dimensions & Tracks | |
|---|---|
Tracks | |
Full dimensions and tracks ...  |
Engine
Engine Detail — 350 ci / 5.7 L Gasoline
Manufacturer | Caterpillar |
Fuel Type | Gasoline |
Configuration | 4-cylinder, liquid-cooled |
Displacement | 350 ci
5.7 L |
Bore/Stroke | 4.50x5.50 inches
114 x 140 mm |
Fuel system | Ensign carburetor |
Air cleaner | oil bath |
Rated RPM | 1100 |
Transmission
Transmission — 3 forward and 1 reverse gear
Type | gear |
Gears | 3 forward and 1 reverse |
Clutch | dry disc |
 | |
Dimensions
Caterpillar R3 Tracks |
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Dimensions |
|---|
Tests
Nebraska Tractor Test 227 | |
|---|---|
Gasoline 3-speed crawler
September 26 - October 15, 1934
Link: Nebraska Tractor Test 227 file | |
Belt power (max) | 41.99 hp
31.3 kW |
Belt fuel use (max) | 4.9 gal/hour
18.5 l/hour |
Drawbar performance | |
Max power | 34.44 hp
25.7 kW |
Gear 2 used for power test. | |
Max pull | 7,622 lbs
3457 kg |
Gear 1 used for pull test. | |
Photos
Caterpillar R3
Caterpillar R3
Caterpillar R3
Caterpillar R3 operator station and controls.
Related models
Caterpillar Twenty-Eight
- Power:
- 41.7
- Production years:
- 1933 - 1935
Caterpillar R4
- Power:
- 40.4
- Production years:
- 1938 - 1944
Caterpillar Thirty
- Power:
- 40.4
- Production years:
- 1925 - 1938
Caterpillar D4
- Power:
- 44.2
- Production years:
- 1938 - 1959
Caterpillar RD4
- Power:
- 44.2
- Production years:
- 1935 - 1940