Wurlitzer Question - Mechanical Buzzing

[Hochstrasser]

I acquired a Wurlitzer 200A yesterday and after taking it apart and cleaning it out and tightening all nuts and whatnot, I am experiencing a mechanical buzzing. I am certain it's nothing electronic because the electronics are completely out of the piano right now. On most notes, when struck hard there is a loud mechanical buzzing, I cannot figure out how to get rid of this. I tried bending the pickups as the manual stated and it made it slightly lower but did not get rid of it. Are Wurlitzers supposed to do this? It doesn't sound like it. I made sure all screws were tightened and everything was otherwise groovy but I don't know what to do about this buzz. This is the second Wurlitzer I've seen this in and so far I do not know how to cure the problem. Any input would be great. Thanks!

- Erich

[hrees]

It can be the pickup shield vibrating against the harp.