It can now be used instead of a hydraulic cylinder. Ratchet jacks came first and were replaced by hydraulic cylinders.
View attachment 500661
View attachment 500662
the ratchet jacks sold at Theissens for ~$40 look like they would work as fried1765 suggests. The handles come off with a simple pin. In fact there would be no reason to actually install the pin at all. The handle could be stored in a toolbox on the tractor and just inserted in the ratchet when needed pulled out and stored in the tool box when not needed. Not as fancy as the folder, but it would be out of the way, easy and cheap. I don't know if the threads will work with ball ends, but I think I'll check it out.
Double HH Ratchet Jack With Pins (Double HH 39392), Tractor Hydraulic Repair | Farm | Ranch | Theisens.com
Catman8 inspired me to build a similar ratcheting toplink.View attachment 501107
In mine I used a $23 toplink and a $31 Harbor Freight binder. A little cutting and welding. Total time to build from start to finish (including painting), 2 1/2 hours.
I don't see why you couldn't try. See what their ratings are to strap somethingI agree - market it!
That said, I'm wondering if anyone has attempted the same thing for a lift arm adjustment? My new JD's one major negative is the lack of a reasonable leveling mechanism for the 3 pt. It has leveling but I have to get off the tractor and use a very awkward adjustment that is just ridiculous in my opinion. On my old For 8n, I could crank the leveling mechanism from the seat, and I did. A lot. I use a grading blade a lot and not having a simple leveling mechanism is a real PITA. The JD system is designed to be set once and forgotten, and that doesn't work for me.
So, why wouldn't this work as a leveler? Would it be strong enough? (2200 lb lift capacity). It would have to avoid interference with the tires.