This is an MT-1800 Struck that my son and I rebuilt. 16hp 6 inch tracks and a 4 speed transmission. This tractor is a lot lighter than the 5000 and a lot less power to the ground. Undercarrage is a lot less strong. The tracks are single row chain. If you weigh down an 1800 and put it in low it can pull the track chain in two. Loader would lift about 600 lbs. Orig. bucket was too small so I found a 48 inch and mounted that. Worked pretty well overall just had to give it time and be carefull with it. SLOW!!! Easy to use and much better than a shovel!!!!