Looks like you might be able to retrofit an off the shelf industrial coupling into it. It apparently runs dry??
Maybe a "Lovejoy" jaw type coupler with an appropriate spider. I am thinking of something you can slide together blind that will run with no maintenance. If it runs in oil, maybe they make spider inserts out of brass?
Sorry, I thought you were just dealing with the pump drive, I see you are into the torque box too.
Big Harold - These old VT16 and VT17 power steering pumps with the close-coupled oil reservoir are now obsolete. However, there are still plenty of parts available for them, and quite often, surplus new pumps are available.
The VT16 and VT17 were designed expressly for power steering purposes - and in the case of the early Cat graders, I believe this setup was supplied by a company named Rivinius Inc.
I have an overhaul manual dated 1987, for the VT16/17 in PDF file format, downloaded from the Eaton technical library - which file should still be freely available to you.
http://www.eatonpowersource.com/literature/?sitesearchterm=vt16
I find that eBay and Hydraulic Surplus companies, are both good for supplying parts and pumps for these old Vickers hydraulics.
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