Did you have a recirculation loop? It may need one, from the destination tank, run a 3/16 line back to the manifold feeding the pump, add a needle valve or use a clamp on the line to reduce the flow, you want just enough to keep the diaphragm wet. They can run dry but perform far better if kept wet. If the destination tank is too far away, you can also just put a tee in the line from the pump, and run a 3/16 or 5/16 line back to the manifold and restrict that flow. This may eliminate the issue.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.