bushings damaged by wd 40

[Leslie Bartlett]

Uhm, treating with gasoline and a match?
les bartlett

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From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Gene Nelson
Sent: Friday, November 23, 2007 4:52 PM
To: pianotech at ptg.org
Subject: bushings damaged by wd 40


Hello list,
Here again with more bushing woes.
Have a client with a relatively new (8yrs) Nordiska 5'8" and all of the
hammer flanges are tight. There is no friction problems anywhere else in the
action. I have reason to believe that these bushings were treated with wd 40
or similar - they were discolored and appeared a dirty burgundy color
compared with the typical bright red on whip flanges.
First visit I chose 7 of the worst offenders and repinned. Friction was over
10g at the flange and was < 3g after repinning. I used my straight broaches
to fit the new pin to the bushing - did not rebush - and the bushings were
very difficult to size - had to shave off felt with the cutting part of the
broach and only went 1/2 size larger on the pin.
Client calls today to say they are tightening up again. Have not experienced
this before. 
Also,  I treated all other flanges with ProTek and they responded very well
- dropped the touchweight at the key from 67 to 57g on average. These are
also tightening up according to the client. Did this work only 6 days ago.
There are no excessive humidity issues in the home.
Will return to experiment with alcohol water and a zapper - electrically
heat the pin to iron the bushing.
Anyone experienced with wd contaminated bushings I would appreciate advice.
The client cannot afford to rebush or replace parts - repinning appears to
have some complication here for some reason.
Thanks.
Gene Nelson


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