The D575A Series, briefly called SD, Super dozer, which Komatsu produced in limited numbers and whose R&D process started in the 1980s and lasted until 2001, was first sold in 2001.
We can say that the most distinctive feature of the limited edition D575A Series that makes it called SD is its engine with 150 horsepower (850 kW) power. Komatsu has its own SA12V170E engine type, which is a 12-cylinder engine. This engine allows the D575A SD to push its 69 cubic meter blade without difficulty even in the most difficult terrain.
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