Power: 54 hp[B] Date of manufacture : 1934 - 1936
Production Manufacturer: Caterpillar Type: Agricultural Crawler tractor Factory: Peoria, Illinois, USA Variants Forty: gas engine Diesel Forty: diesel engine Caterpillar Forty Power Drawbar (tested): 48.91 hp 36.5 kW Belt (tested): 56.42 hp 42.1 kW Caterpillar Forty Engine Mechanical Chassis: crawler Cab: Open operator station. Transmission: 4-speed gear Dimensions & Tracks Weight: 13625 lbs 6180 kg 16-inch tracks Full dimensions and tracks ... Forty Serial Numbers 1934: 5G1 1935: 5G43 1936: 5G434 Final: 5G584 how to read serial numbers...

Caterpillar Diesel Sixty-Five	Power: 85 hp[B]	Date of manufacture : 1931 - 1932

Caterpillar Diesel Thirty-Five	Power: 50 hp[B]	Date of manufacture : 1933 - 1934

Caterpillar Fifteen	Power: 22 hp[B]	Date of manufacture : 1929 - 1933

Caterpillar Fifty	Power: 67 hp[B]	Date of manufacture : 1931 - 1937

Caterpillar Forty	Power: 54 hp[B]	Date of manufacture : 1934 - 1936

Caterpillar RD4	Power: 44 hp[B]	Date of manufacture : 1935 - 1940

Caterpillar RD7	Power: 75 hp[B]	Date of manufacture : 1935 - 1940

Caterpillar RD8	Power: 114 hp[B]	Date of manufacture : 1935 - 1936

Caterpillar Seventy	Power: 77 hp[B]	Date of manufacture : 1933 - 1937