The LR standard towbar for the P38 has a detachable swan neck / ball, but it is usually held in place by a big rusty bolt with an equally rusty nut and locknut. Removing it means getting the spanners out and mucking up your tweeds or pin-stripes. So it stays put and rusts further. I replaced the bolt with a cotter-pin and R-clip, to make the operation much simpler, and clean. A cotter-pin that is exactly the right size is a Massey Ferguson top link pin off one of the old Fergies. It has Imperial dimensions of course, but is a much better fit than the metric bolt anyway.
Note that this is my own experience (750 kg un-braked trailer) and I am doing no more than recounting it - use a cotter pin at your own risk...particularly if you are towing a 20 foot container...
So, with its agricultural components, coil springs, manual seats, no cruise control, is my P38 evolving into a tratter? Obviously without the rust, draughts, noise, oil leaks and total lack of power of course.
View attachment 257036
Don't think mine is detachable. Think that was an optional extra. Or if mine ever was it sure as hell isn't now!