Signs of shaft deflection

Most pumps have tight tolerances in the following rotary elements  

se tight toleranee rotary elements have corresponding tight 

The seal chamber internal bore corresponding to the posterior of the mechanical seal OD. 

Let s interpret the physical evidence that you might see at these close tolerances and their source. To begin  

You might sec gouge or wear marks all around the circumferences of close tolerances on the rotary elements, and a corresponding wear spot at approximately 60° from the cutwater on the stationary elements. 

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