Success! I ended up splitting the pump in half and wiping everything down and cleaning it up good. I made a couple new gaskets and assembled it and verified it worked by pouring oil in the suction side and cranking the gear to see it suck it in and push it out the pressure side.
Some old repairs made it a @#$% to get back together again, but I finally did. Had to mess with an old repair to the remote hydraulic valve to seal it back up again, but the 3-point lifts strong and all is in order again.
I think it was a combination of cleaning the pump and replacing the gaskets, making sure the suction tube was clear (by blowing air through it back into the reservoir), and replacing the orings on the pressure tubes and flow control valve that got it up and running. Just cost me about $2 in o-rings, some gasket material I already had on hand, and a few days of my life... :roll: Hope I don't have to do it again anytime soon!
Thanks to everyone for all the input and words of advice!
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