The Acco Super Bulldozer is the largest and most powerful tracked bulldozer ever made. It was built in Italy by the Umberto ACCO company. The Acco super bulldozer was constructed mainly of Caterpillar parts, however many other components were specially adapted. The dozer blade, for example, is bigger than anything Caterpillar has ever made. This bulldozer has a gross weight of 183 tons and is powered by two 675 hp (503 kW) Caterpillar engines placed horizontally opposed, which deliver a total combined output of 1,350 hp (1,010 kW). The super bulldozer has a blade that is 23 feet (7.0 m) wide and 9 feet (2.7 m) high, whilst the total length of the Bulldozer is over 40 feet (12 m), from the tip of the blade to the ripper on the rear. The ripper alone is about 10 feet (3.0 m) tall, being powered by huge hydraulic rams.
This bulldozer was initially built to be exported to Libya in the early 1980s to help in land development. As the President of Libya, Col. Gaddafi, was very involved with international terrorism at that time, the United Nations endorsed and sanctioned huge trade embargoes on that country. As a direct consequence of these trade restrictions, the completed Acco Dozer was never shipped to its intended destination, but remained in Italy where it was built. This bulldozer has never been put to any operational use and was put into storage.