Wonder if anyone can help. Recently, the bulbous red plastic end of jockey wheel clamping handle broke off on my caravan, so I purchased a new one. However, when I attempted to remove the old one I came up against a problem. In unscrewing the old handle, it came in its usual easy manner until it was further unscrewed than it had probably been since being installed and it then came to a solid full stop. I found that the pressure I would need to make it turn further was of thread-stripping magnitude so I didn't ! I suspect it may be that some exposed thread behind the actual clamp may have become corroded (2007 caravan), but before starting to strip the A frame cover (or grovelling around on the floor if the reluctant handle prevents the stripping of the A frame cover !) I wonder if there is some other cause of the handle-removal problem, though I can't imagine what it might be.