Caterpillar Fifty

The Caterpillar Fifty is a tractor produced by Caterpillar. It is equipped with a 831 ci 13.6 L engine. The rated power output is 71.81 hp 53.5 kW. Transmission: 4 forward and 1 reverse. Drive type: crawler. Operating weight: 18245 lbs 8275 kg.

Overview

	1931 - 1937 Agricultural Crawler tractor
1931 - 1937
Agricultural Crawler tractor

Production
Manufacturer	Caterpillar
Agricultural Crawler tractor
Built in Peoria, Illinois, USA

Caterpillar Fifty Transmission
4-speed gear
Transmission details ...

Caterpillar Fifty Power
Drawbar (tested)	64.38 hp 48.0 kW
Belt (tested)	71.81 hp 53.5 kW
Performance test details ...

Mechanical
Drive	crawler
Open operator station.

Dimensions & Tracks
Weight	18245 lbs 8275 kg
15-inch tracks
Full dimensions and tracks ...

Engine

Engine options
Caterpillar 4-cyl gasoline
Caterpillar 11.4L 4-cyl diesel
Caterpillar 13.6L 4-cyl diesel

Engine Detail — Gasoline

Manufacturer	Caterpillar
Fuel Type	Gasoline
Configuration	4-cylinder, liquid-cooled

Engine Detail — 693 ci / 11.4 L Diesel

Manufacturer	Caterpillar
Fuel Type	Diesel
Configuration	4-cylinder, liquid-cooled
Displacement	693 ci 11.4 L
Bore/Stroke	5.25x8.00 inches 133 x 203 mm
Rated RPM	850

Engine Detail — 831 ci / 13.6 L Diesel

Manufacturer	Caterpillar
Fuel Type	Diesel
Configuration	4-cylinder, liquid-cooled
Displacement	831 ci 13.6 L
Bore/Stroke	5.75x8.00 inches 146 x 203 mm
Rated RPM	1000

Transmission

Transmission — 4 forward and 1 reverse gear

Type	gear
Gears	4 forward and 1 reverse

Dimensions

Caterpillar Fifty Tracks
Width	15 inches 38 cm

Dimensions
Weight	18245 lbs 8275 kg

Tests

Tractor Tests
NTTL 204: gasoline 4-speed crawler
NTTL 214: 11.4L diesel 4-speed crawler
NTTL 240: 13.6L diesel (850 rpm) 4-speed crawler
NTTL 241: 13.6L diesel (1000 rpm) 4-speed crawler

Nebraska Tractor Test 204
Gasoline 4-speed crawler May 18 - June 11, 1932 Link: Nebraska Tractor Test 204 file
Belt power (max)	56.14 hp 41.9 kW
Belt fuel use (max)	6.7 gal/hour 25.4 l/hour
Drawbar performance
Max power	49.30 hp 36.8 kW
Gear 1 used for power test.
Max pull	12061 lbs 5470 kg
Gear 1 used for pull test.

Nebraska Tractor Test 214
11.4L diesel 4-speed crawler May 17 - June 2, 1933 Link: Nebraska Tractor Test 214 file
Belt power (max)	61.26 hp 45.7 kW
Belt fuel use (max)	4.6 gal/hour 17.4 l/hour
Drawbar performance
Max power	52.61 hp 39.2 kW
Gear 1 used for power test.
Max pull	12765 lbs 5790 kg
Gear 1 used for pull test.

Nebraska Tractor Test 240
13.6L diesel (850 rpm) 4-speed crawler August 19 - 29, 1935 Link: Nebraska Tractor Test 240 file
Belt power (max)	61.04 hp 45.5 kW
Belt fuel use (max)	4.1 gal/hour 15.5 l/hour
Drawbar performance
Max power	52.99 hp 39.5 kW
Gear 2 used for power test.
Max pull	13109 lbs 5946 kg
Gear 1 used for pull test.

Nebraska Tractor Test 241
13.6L diesel (1000 rpm) 4-speed crawler August 29 - September 16, 1935 Link: Nebraska Tractor Test 241 file
Belt power (max)	71.81 hp 53.5 kW
Belt fuel use (max)	5.1 gal/hour 19.3 l/hour
Drawbar performance
Max power	64.38 hp 48.0 kW
Gear 1 used for power test.
Max pull	13490 lbs 6119 kg
Gear 1 used for pull test.

Photos

Caterpillar Fifty tractor photo