The 2019 model year featured several key Caterpillar track-type tractors : the D8-T , the D-5 Low Ground Pressure check here , and the D8-R . In broad terms , the D8-T showcased Caterpillar's leading tractor for large excavation operations, while the D5 LGP focused on sensitive terrain . The D8R , meanwhile, offered a more heavy-duty choice suited