Vibration on Input bearings for Hydraulic coupling

[Tool819]

What could be causing a 9 mil vibration on the I/B journal bearing of a Fluid drive coupling(turbine driven 3600 rpm)at 2400-2600 rpm range? Never had this problem before.Turbine was just overhauled and so was boiler feed pump. Misalignment is one consideration,Oil temp is roughly 160 degrees.

 

[Strong]

Check balance of both shaft couplings. Both should have been balanced in shop and assembled with match-marks lined up correctly.

Walt
w_f_strong at msn dot com