The Caterpillar D6 is a bulldozer manufactured by Caterpillar starting from 2019. It features a 215 hp (160.3 kW) Caterpillar C9.3B 6-cylinder liquid-cooled diesel engine with Tier IV emissions and selective catalytic reduction (SCR) emission control. The tractor has a 4-speed power shift transmission and a crawler drive with double-reduction planetary final drives. It includes a cab standard with air-conditioning. Fuel capacity is 90 gallons (340.7 L) with additional capacities for exhaust fluid and hydraulic system. The hydraulics are load sensing variable displacement type with a pressure of 4000 psi. The D6 offers several blade attachments including the 172.8" Caterpillar 6A, 130.4" Caterpillar 6SU, and 144.8" Caterpillar VPAT blades. Dimensions include a length of 186.2 inches, width of 106 inches, and operating weight up to 48788 lbs. Electrical system includes a 12-volt battery setup with 700 CCA. The D6 is related to the Caterpillar D6T model.