The Caterpillar D10 is a bulldozer manufactured by Caterpillar Inc. between 1977 and 1987, when it was superseded by the D11. It was the first modern tractor to use the elevated drive sprocket to improve durability, operator comfort, and ease of maintenance.

A bulldozer or dozer is a large, motorized machine equipped with a metal blade to the front for pushing material: soil, sand, snow, rubble, or rock during construction work. It travels most commonly on continuous tracks, though specialized models riding on large off-road tires are also produced. Its most popular accessory is a ripper, a large hook-like device mounted singly or in multiples in the rear to loosen dense materials.