Aside from fixing that, one question he has for me is: can I give him an idea as to how unbalanced the machinery currently is? About the only way I know how to do that (aside from bringing in someone who balances machinery for a living) is to model the situation, take a guess at the unbalanced force, and adjust that force to match the measured amplitudes (i.e. data they provided).
But is there a way to answer his question based on the data alone? (Which I could back check once the modeling is done.) I would think that the measurements taken at the housing/bearing level would be magnified by the fact the support is now shaking so badly.