[R-390] Re: R-390A BFO PROBLEM

[Drew P.]

Roger wrote:

> Once you get it apart you can clean the burs off the
> shaft with a file. You 
> will likely need to clean a bur off the shaft from
> where you installed the 
> knob. You need that end of the shaft clean as it
> goes back into the shaft 
> extension bushing.

Good advice, Roger.

To that I would add:

When you reinstall the bellows and tighten the
setscrews, they will raise a burr that will cause the
problem to recur next time you try to diassemble.

I ground the cup point off the setscrews before
reinstalling.  The new slightly rounded point grips
the shaft with no problems and does not mar the shaft.

Drew


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