AllisChalmers Crawlers: An Impressive Track Record
Making the transition to Buda diesel. The years after World War II saw new and innovative crawlers from AllisChalmers using the GM Series 71 engine. The "little brother" 6ton HD5, introduced in 1946, used a 271 engine and a 5speed transmission. The HD19 was introduced in 1947; the HD15 and HD9 in 1951.