The D11N was introduced in February 1986 to replace the D10. The D11N had some major improvements over the D10, it includes a bigger track and blade, a longer track by 21 inches (0.53 m). The U blade was just under 21 feet (6.4 m) long and 7 feet (2.1 m) high. This increased the blade capacity to 45 cu yd (34 m3). The D11Ns weight was 204,517 pounds (92,767 kg). It was powered by a 770 horsepower (570 kW), 2,105 cu in (34.49 L) 3508 V-8 Diesel engine. The D11Ns improvements made it over 10 percent more productive than the D10. In 1987 a hydraulically powered impact ripper was added to the D11N which raised the weight up to 225,950 lb (102,490 kg). This would become known as the D11N Impact Rippe
