1. Envelope spectra of GB-256 (Tar Pump) is showing 1xRS and 2xRs,
No bearing defect frequencies, appear 1xRS and 2xRS, what is cause it?
Why 1xRS is dominant in envelope spectra?
1xRS Hz
2xRS

2. After overhaul, took data on 14 December 2009, 1xRS and 2xRS disappear at envelope spectra
We found Stationary O ring at MechSeal was broken. But is it causing the 1xRS appear on envelope spectrum?
1xRS, peak decrease from g p-p to g p-p

5. Stationary O Ring

6. In velocity spectrum exist 2.5Hz, what is this?
2xRS
2.5 Hz, what is ?
5xRS
1xRS
10xRS