Caterpillar Seventy Specs ( 1933-1937 )
Overview
The Caterpillar Seventy is an agricultural crawler tractor produced in Peoria, Illinois, between 1933 and 1937, with a limited production run of 266 units. It is equipped with a 21.5L four-cylinder liquid-cooled gasoline engine and weighs 32,000 lbs on 18-inch wide tracks. The mechanical layout features an open operator station and a gear transmission providing six forward and two reverse speeds.
Ideal Applications
Tested Power Performance:
According to Nebraska Tractor Test 213, the Seventy achieved a maximum tested belt power of 82.4 hp and a maximum drawbar pull of 16,796 lbs.
Engine Configuration:
The 1310 ci gasoline engine is rated at 700 RPM and is equipped with a 7.00x8.50 inch bore and stroke.
Drive System and Weight:
This crawler-driven machine weighs 32,000 lbs and is equipped with 18-inch tracks for operation.
Production
| Description | Agricultural Crawler tractor / Built in Peoria, Illinois, USA |
|---|---|
| Manufacturer | Caterpillar |
| Total built | 266 |
Engine
| Engine type | Caterpillar 21.5L 4-cyl gasoline |
|---|---|
| Bore/Stroke | 7.00x8.50 inches (178 x 216 mm) |
| Description | Caterpillar / gasoline / 4-cylinder / liquid-cooled |
| Displacement | 1310 ci (21.5 L) |
| Rated RPM | 700 |
| Belt (claimed) | 70 hp (52.2 kW) |
| Belt (tested) | 82.4 hp (61.4 kW) |
| Drawbar (tested) | 72.73 hp (54.2 kW) |
Transmission
| Gears | 6 forward and 2 reverse |
|---|---|
| Transmission type | 6-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Drive | crawler |
Dimensions & Tires
| Weight | 32000 lbs (14515 kg) |
|---|
Caterpillar Seventy Tracks
| Width | 18 inches (45 cm) |
|---|
Dimensions & Tracks
| Description | 18-inch tracks |
|---|---|
| Weight | 32000 lbs (14515 kg) |
Nebraska Tractor Test 213
| Belt power (max) | 82.4 hp (61.4 kW) |
|---|---|
| Description | Gasoline 6-speed crawlerMay 15 - June 6, 1933Link: Nebraska Tractor Test 213 file / Drawbar performance / Gear 1 used for power test. / Gear 1 used for pull test. |
| Max power | 72.73 hp (54.2 kW) |
| Max pull | 16796 lbs (7618 kg) |