How can you tell if hydraulic pump is starving?

[CO_Farmer]

"I suspect that you have an inch of gunk on the bottom and new fluid works good until it picks up the gunk again."

My thoughts also, Ernie, assuming there is also a problem with the 3ph. I would also make sure the servicing stop valve is not partly closed.

I GOT IT!

I cycled the service valve several times from full closed to full open while operating the 3PH a few times, and the loader started working perfectly again.

FWIW, there wasn't any gunk inside the transmission sump where the screen filter is, the fluid is very clean.

I want to sincerely thank everyone for the ideas and suggestions. I just came in for lunch and the road is almost cleared enough so we can get out.