[quote="CVPost-Rick3"](quoted from post at 16:16:57 06/24/20) Iâ€™m getting zero Psi without the lever activated and only 700 with it activated.[/quote]
You said "I scooped up a big load of gravel and took it/ dumped it and was going to back drag it with loader but it wouldn’t respond except to go down" and "used red" offered a good suggestion that something could have happened to the loader valve.
Have capped off the feed yet to the loader valve?
Until you you this, to be absolutely sure there isn't a high pressure leak to return there your tests at the remote couplings really don't mean anything, and there's no valid reason to wrench on the pressure control on the pump.
That being said, it may well be that the loader valve is just fine and the trouble IS in the pump, but IMHO, it would be prudent to rule out the loader valve BEFORE pursuing changes to the pump.