Caterpillar D9 is a modern American heavy bulldozer produced for the civilian market. The first car prototypes were produced in 1954. In the same year, serial production began, which continues to this day. The car is equipped with a C18 ACERT engine with a capacity of 464 hp. (version D9T) or 3408 HEUI with a capacity of 474 hp. (version D9R). By default, the car does not have factory armament. Caterpillar's D9 series bulldozers (including the D9R model) are one of the most popular construction machines of this type in the United States. They are characterized by significant maximum engine power, very high mechanical reliability and relatively low operating costs. These elements meant that they were used by American forces, particularly during the Vietnam War (1964 / 1965-1975). Vehicles of this type, especially the D9T and D9R models, were also purchased by the Israeli armed forces and deeply modified. The changes consisted in installing another engine, adding armor to protect against small arms and anti-tank grenade launchers of older generations. The glass was also made of glass that protected against small-caliber fire. The changes also concerned the installation of specialized mining equipment. The Israeli Armed Forces have been using modified Caterpillar D9 bulldozers since 1956 to the present day. They managed to take part in many conflicts, including the Six-Day War (1967), the Yom Kippur War (1973) and operations in southern Lebanon (1982).
