Harry Lammertink 25-08-2022 I've had the same problem. The cause was that I had pushed the handle down with the lock pressed in and pushed it too far, so clamped it too tightly on the tow ball. Because I have a detachable towbar ball, I mounted the towbar ball complete with bicycle carrier on the head. I stood on the bicycle carrier while someone else held down the lock and operated the handle.
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