So the pump is back from repairs. But the strange thing is when Pfeiffer received it, they said it was working fine! Although I did manage to knock the rotor out of balance and it needed fresh oil. Here is the pump capped with a blank conflat running at full speed. GOOD.
But the problem was never the pump! The problem is a gross leak in the vacuum chamber.
Once I attach the pump to the chamber, the pump won’t spin up… indicating a gross vacuum leak.
The copper gaskets are all new, and I even got the torque wrench out to make sure the conflats were tight enough.
I can’t hear any hissing.
How do I troubleshoot this…
Here is a good overview on leak detection.
I though I head a hiss near the bellows. So I tested just the bellows and it’s working fine. So the leak is somewhere in the chamber.