Seen here at the 2015 Heyfield Vintage Rally is a nicely restored Allis Chalmers HD19 crawler tractor from the late 1940s.
Allis Chalmers was a major American manufacturer of farm machinery who operated from 1847 till 1985 when it was sold to K-H-D AG of Germany (which was renamed Deutz-Allis). The company built its first crawler tractor in 1928 and adopted General Motors diesel engines to power its heavier machines.
The HD 19 is powered by a seven litre 6-71 Detroit Diesel engine producing 140 hp which drives through a two speed transmission. Bare weight of the tractor is around 18.3 tonnes with a rated drawbar pull of 11.2 tonnes. Its contemporary rivals were the International TD25 and the Caterpillar D8.