Turbo pump failure: Agilent MSD 5977A series with Agilent turbopump

We had MS turbo pump failure and I would like to share what we saw and what we did to fix it.

After shutting down the MS for a month, we had MS turbopump speed problem. The turbopump speed did not go above 20%.

Here is the video of the turbopump

We called Agilent support and they told us some tips and troubleshooting. I will list that as a flowchart as following.

We end up replacing the Agilent turbopump with Pfeiffer HiPace 300H turbopump (This was suggested by Agilent support team).

I hope you never get this problem, but if you did, I hope it helped!