Makes you appreciate how hard the settlers worked to clear land for farming.I know from experience how much force it takes to move a stump. We had a 100 ton Koehring Harvester coming to a dead stop in low gear. The operator asked us mechanics to come out and take a look at the machine. When we saw the machine come to a dead stop we had never had this problem before. When the machine went in reverse it was fine. When going forward it would run okay for a little bit and then stop. I went to the front of the machine to see if there was any issues with the front drive axle. Then I noticed the poplar stump that was sticking out of the ground about a foot and a half snagging the tow cable which was hanging a little low and sure enough that stopped that machine right now.