[CAUT] Teflon AND verdigris?

[Don Mannino]

Mark,

 

Many things could have caused this to happen.  I have found that WD-40
will cause a nice green patina on action centers in a short time if the
conditions are right.

 

If you want to be sure, I would unpin the set, remove the bushings,
clean the wood with dry cleaning solution / naphtha, then install new
pins and bushings.  For me this is one of the nice aspects of Teflon
bushed actions - the bushings are not hard to replace!

 

Don Mannino

 

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of
Mark Cramer
Sent: Wednesday, November 05, 2008 11:47 AM
To: CAUT
Subject: [CAUT] Teflon AND verdigris?

 

Regulating a 63' Teflon action L for a good friend, I was surprised to
find verdigris at the hammer flange centers.

 

This is a solid Teflon action with nice firm centers and no clicks,
however with verdigris, hammer-flange friction in some cases exceeds 10
grams.

 

Steinway warns against lubing Teflon parts, nonetheless I have to wonder
if there is some Q & D means of easing the verdigris without damaging
the teflon?

 

I know that whether we properly disassemble, clean, ream and re-pin the
parts, or simply squirt in a bit of miracle juice, the verdigris will
come back. However, something that will extend the use of these
otherwise moderately worn parts, is entirely appropriate for this
particular piano. 

 

Given the recent discussion of lubing key-bushings, I'm just concerned
that the solvent/carrier in CLP for instance may dissolve/harden the
Teflon, while perhaps ProLube may not?

 

Anyone know for sure?

 

Thanks,

Mark Cramer, RPT

Brandon University     

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