That towball one is a really valid point, not only is the standard ball not rated for shock loads but if surged a lot of the snatch type straps will pop off the ball leading to the recovery vehicle launching like Apollo 11 due to not collecting the expected weight on the snatch strap. Have seen one wagon doing the full send over a banked corner and landing on a patch of native bush, slowly sliding about 8m down a bank leading to a HEAP more recovery work and a lot more dodgy a situation!!!
The recommended option with a towball when recovering is to not use the towball itself, but looping the tow strap under the towbar tounge and then crossing the loop over the top of the tounge so that the legs of the loop pass each side of the towball shank. That way the load is placed onto the towbar and direct to the vehicle chassis and not the shank of the towball. Biggest risks then are sharps on the bar tounge damaging the tow strap and shock load bending the tounge...
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