repair bridge

[Richard Brekne]

Chunping Ding wrote:

> Hi, everybody.
>
> I am new in piano technician team. My first major task is to repair a
> seriously cracked base bridge of my upright piano. One fourth of the
> pins are loose. I would like to re-cap the bridge. Firstly, I would like
> to take the bridge off the sound board. I tried to put vinegar between
> the bridge and the bridge apron (shelf). However, I failed to dissolve
> the glue. Does anyone know any more powerful dissolvent? Or do I have to
> use some special vinegar (I used my cooking vinegar)? Or is there any
> hidden screw between the bridge and the apron? Then I tried to dissolve
> the glue between the apron and the sound board. I failed again. Could
> someone give me some hints on how to take the bridge off?
>
> Your help is highly appreciated.
>
> Chunping

Try Methylated Spirits. If is an older piano this should work nicely

Richard Brekne