The redesigned Morbark Model 4600XL Track Wood Hog combines durability and high horsepower options of bigger models like the 6600 while still meeting the road weight requirements of smaller machines. It weighs 82,000 pounds. The hammermill is 14 percent larger than its predecessor, increasing the tip swing to 36 inches. It has power options up to 860 hp. A Caterpillar 325L is the standard undercarriage. The 4600XL uses Morbark’s Iqan Feed System.