Adapter
 

Owen Bell at Aviation Enterprises is also another source for the adapter.
Jeff

power adapter for hyd. pump
 

wslade2.
I purchased the spline sockets from Sears paid about $40. It comes with about 10 different sized sockets. With Sears all but closed you can check the internet, or get them at Harbor Freight for $10. I know a lot of mechanics don't like HF quality but these socket and what you're about use them for it's fine. I don't remember what size fits the Hyd. pump spline,but you can figure it out. If you buy the HF sockets be sure you pick up a 6"-12" 3/8" extension that you can cut off the female end and install that into a 1/2" variable speed electric drill to turn the hyd. pump. You can buy the drill from HF as well-again quality not great but cheap to do the job! All for about $60.
Regards, BILLS

Yup, just left harbor freight, got spline socket set for $9.95, goes right on the pump shaft. Already had drill, drill driver adapter, extensions, etc.

Hydraulic pump shaft adapter
 

wslade2.
Good deal! Hope you have good luck with this procedure. Let us know how it go for you.
Regards, BILLS