I saw a couple of items on Amazon that were knobs/extensions to attach to the valve on a hydraulic jack that obviate the need to use a slotted handle or such to tighten and loosen the valve, and Saturday I made my own with a knob I had in my collection, a piece of 3/4" bar stock and a little lathe time. I turned on end down to 5/16" to be threaded for the knob, and drilled the other end 11/32" to fit the valve stem and then cross drilled it 9/64" for the cross pin. I threaded the end, knocked the cross pin out of the valve, inserted the valve into the adapter, drove the cross pin back in, installed the knob and a jam nut, and now I have a much easier way of turning the valve on the jack on my press.
Took me a total of about a half hour to make it.
Took me a total of about a half hour to make it.