Caterpillar D10

The Caterpillar D10 is a bulldozer originally manufactured by Caterpillar between 1977 and 1987, when it was superseded by the D11; the successor of the smaller D9L was then rebranded as the D10N, which series of models continues to be produced (under the subsequent D10R, D10T, and—once again, as of 2023—D10 designations). It was the first modern tractor to use the elevated drive sprocket to improve durability, operator comfort, and ease of maintenance.