Fourty years ago or so my brother-in law who was in the wood cutting business bought a sizable farm tractor to haul logs out of the woods. Each rear wheel had a wheel bolted to is as in dual rear wheels but there were no tires installed on these wheels. Along with the purchase of this tractor was a pallet with a large coil of steel cable, a choke cable and a sizable snatch block. He was going to sell the cable and wheels for scrap. He got this tractor stuck in mud deep in the woods and called me to help him get the tractor out of the mud. I had him call the seller of this tractor and ask him about the cables and the extra wheels. The seller showed up with a truck with four 8" thick 24" wide and 15' long wood planks on it. Long story short, the planks were placed in line with the tractor front wheels, two on each side, the choke cable and snatch block were connected to a nearby tree, one end of the long cable connected to the tractor front and extended out thru the snatch block, brought back to and wrapped around one of the wheels. He started the tractor, put it in low gear and carefully let the clutch out. The cable pulled tight and yanked the tractor out of the mud and up onto the wood planks. We moved the planks as the tractor advanced until it was clear of the mud. These planks were very heavy and it took six of us to move them after the tractor was off them and onto the next pair. So my brother-in law found out what the extra equipment was used for the day before he was going to scrap it.
Mad Mackie in CT