Power: 44 hp[B] Date of manufacture : 1935 - 1940
Production Manufacturer: Caterpillar Type: Agricultural Crawler tractor Factory: Peoria, Illinois, USA Caterpillar RD4 Power Drawbar (tested): 35.06 hp 26.1 kW Belt (tested): 39.82 hp 29.7 kW Caterpillar RD4 Engine Mechanical Chassis: crawler Cab: Open operator station. Transmission: 5-speed gear Photos Caterpillar RD4 photos... Dimensions & Tracks 44-inch tracks Full dimensions and tracks ... RD4 Serial Numbers 1936: 4G1 1937: 4G3663 1938: 4G8858 1939: 4G9912 how to read serial numbers...

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

Caterpillar Seventy-Five	Power: 103 hp[B]	Date of manufacture : 1933 - 1935