Hammer flange question

[Geoff Sykes]

Greetings all --
 
I have a customer with a Young Chang G-175 on which I'm going to go in and
do some regulating. It's a 1987 so I know that it's in the middle of the
growing action brackets years, but so far it shows little, if any, signs of
this happening. 
 
Most of the hammer flanges in this piano are too tight, giving from one to
two swings at best. Today's question is about hammer flanges. 
 
If a flange is too loose, the bushing would usually need to be re-pinned,
yes? That said...
 
I understand that there are three ways to deal with too-tight flanges:
    1) repin - remove the old pin, replace and/or ease the bushing and repin
    2) lubricate - with Protek, Goose-Juice, Naphtha+Silicon, etc.
    3) ease - Alcohol and water
 
What would you consider to be the requirements for any of these treatments?
In other words, why and when do you choose one of these treatments over the
others?
 
In the case of this Young Chang, the bushings and pins are clean, showing no
signs of verdigris. 
 
Looking forward to the discussion.
 
-- Geoff Sykes
-- Assoc. Los Angeles
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