Caterpillar Thirty Specs ( 1925-1938 )
Overview
The Caterpillar Thirty is a farm crawler manufactured in San Leandro, California, between 1925 and 1938 as a continuation of the Best model Thirty. It features a 7.6L 4-cylinder engine rated at 1400 RPM and was available with either 3-speed or 5-speed gear transmissions. Nebraska Tractor Test 272 reported a maximum belt power of 36.37 hp and a maximum drawbar pull of 6120 lbs.
Ideal Applications
Tested Drawbar Performance:
According to Nebraska Tractor Test 272, the unit achieved a maximum drawbar pull of 6120 lbs and a maximum power output of 30.88 hp.
Belt Pulley Output:
The tractor is equipped with a 12-inch diameter belt pulley rated at 840 RPM that delivered 36.37 hp during testing.
Crawler Track Configuration:
The drive system uses tracks available in five widths ranging from 13 to 30 inches with gauge options of 43.75 or 60.75 inches.
Production
| Description | Agricultural Crawler tractor / The Caterpillar model Thirty is a continuation of the Best model Thirty, which had been in production since 1921 |
|---|---|
| Factories | San Leandro, California, USA |
| Manufacturer | Caterpillar |
Engine
| Aux. fuel | 2.6 gal (9.8 L) |
|---|---|
| Engine type | Caterpillar 7.6L 4-cyl gasoline |
| Fuel tank | 37.5 gal (141.9 L) |
| Air cleaner | oil bath |
| Bore/Stroke | 4.75x6.50 inches (121 x 165 mm) |
| Description | Caterpillar / gasoline / 4-cylinder / liquid-cooled |
| Displacement | 461 ci (7.6 L) |
| Fuel system | Zenith K5A carburetor |
| Rated RPM | 1400 |
| Belt (tested) | 36.37 hp (27.1 kW) |
| Drawbar (tested) | 30.88 hp (23.0 kW) |
Transmission
| Clutch | dry disc |
|---|---|
| Gears | 3 forward and 1 reverse / 5 forward and 1 reverse |
| Type | gear / gear |
| Transmission type | 3-speed gear / 5-speed gear |
| Transmission type | 3-speed gear / 5-speed gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Drive | crawler |
Dimensions & Tires
| Gauge | 43.75 inches (111 cm) / 60.75 inches (154 cm) |
|---|
Belt Pulley
| Diameter | 12 inches (30 cm) |
|---|---|
| RPM | 840 |
| Width | 8.5 inches (21 cm) |
Caterpillar Thirty Tracks
| Width | 13 inches (33 cm) / 16 inches (40 cm) / 18 inches (45 cm) / 24 inches (60 cm) / 30 inches (76 cm) |
|---|
Dimensions & Tracks
| Description | 13-inch tracks |
|---|
Nebraska Tractor Test 272
| Belt power (max) | 36.37 hp (27.1 kW) |
|---|---|
| Description | Distillate 5-speed crawlerOctober 13 - 24, 1936Link: Nebraska Tractor Test 272 file / Drawbar performance / Gear 2 used for power test. / Gear 1 used for pull test. |
| Max power | 30.88 hp (23.0 kW) |
| Max pull | 6120 lbs (2776 kg) |
References
| Description | 30 published in 1926, by Caterpillar / Thirty Tractor published in 1926, by Caterpillar |
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