This machine, imported into New Zealand for hauling logs, replaced eight bullock teams (112 animals).

The Caterpillar Sixty Horsepower tractor crawler of 1919, was the world's first successful bulldozer. ----A bulldozer is a crawler ( Caterpillar tracked Tractor) equipped with a substantial metal plate (known as a blade) used to push large quantities It helped launch the Caterpillar name and legend. Caterpillar Inc ( is a United States -based Corporation headquartered in Peoria Illinois. Initially developed by the Holt Company of California, with a tricycle-type crawler in that it had rear drive tracks and a forward steering wheel. Benjamin Holt (January 1 1849 Concord, New Hampshire &ndash December 5 1920 Stockton was an American inventor who developed Holt tractors became successful in West coast logging and farming industries, and formed technology in which William Foster & Co. built the British Army Mark I tanks of the First World War. William Foster & Co Ltd was an agricultural machinery company based at Lincoln, UK and usually just called "Fosters of Lincoln" The British Army is the land armed forces branch of the British Armed Forces. The British Mark I was the world's first combat Tank, entering service in the middle of World War I, born of the need to break the domination of trenches and World War I (abbreviated WWI; also known as the First World War, the Great War, and the War to End All

From that, the crawler tractor came to stay, and Holt and Best continued to build them into the early, 1920's when the two companies merged in 1925 to form Caterpillar Tractor Company.

The Cat sixty was famous for its overhanging radiator, individually mounted cylinders, lever controls and open clutch. Also, the straight exhaust, rough seat and exposed fuel tank, made the Sixty a work machine. Initially, the crawlers were used to pull farm equipment and road scrapers. They did not have a blade on the front. Later, cable lift blades were rigged up, so that the crawlers could be used as a bull dozer.

External links

• Caterpillar history from the official Caterpillar website
• Caterpillar Sixty
• [1] Model of Soviet Stalinets Cat 60