We have a pump/motor assembly on a hydraulic power unit installed at a customer's site. The customer has taken velocity readings with an accelerometer of 1.24 in/sec. at 1800 CPM (motor speed) on the pump. According to their Rathbone chart this is extremely high. I am not familiar with this chart and am trying to find some information. It is apparently a "standard" preventive maintenance reference.
If there is a problem - is unbalance in one of the components a likely source?
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