So I recently buried my U1400 in a creek. It weighs 10k. I buried it up to the axles(portal) and had the front fender ensnared in tree roots. I had to run over three hundred feet of line including the dynamic strap and use my 23000 lb U500 with 16.5 ton winch and doubled it with a snatch block and it would not budge the 1400. Then I got a 45,000 lb 8 tire tractor with forward assist to pull it. I used the app from safeXtract and it told me I needed at least 30k pounds to get it out, but the app does not take into account tree roots snagging your bumper. We added two 3/8 inch 50 foot chains to the synthetic lines and pulled. U1400 didn’t move. My synthetic lines held but the chains broke twice. Got a backhoe and dug out rear tires. Front of motor on u1400 had been in ice water for 24 hours and the belt was slipping on the air compressor leaving me unable to shift or to shut off the motor due to no air pressure. Also my brakes were locked because I couldn’t build air pressure. With the rear tires dug out of the mud by the backhoe,the tractor drug the u1400 out, locked brakes and all. My synthetic lines,etc performed great. Chains not so much. I also broke a strap rated for 30k lb that was new in this process.
And the u1400 was as good as new once I cleaned it. Differential fluid, etc all good. I think they are built better than a tank. My take away is from now on all my recovery lines will be correctly rated synthetic lines. No more in line straps, no more chain, no more cable(too heavy).