Pinblock/back separation repair

[Mike Spalding]

Tom,

No adhesive?

Mike

tom wrote:
>
> List,
>
> My last back repair was on a generic spinet –early 50’s as I recall.
>
> I’ve often lowered pitch before pulling things together with heavy C 
> clamps, but this piano was 100 cents + low .
>
> I set up my accutuner and checked pitch across the scale as I 
> –SLOWLY!!! --tightened and closed the back.
>
> Easiest pitch raise ever! The thing came up right around pitch as the 
> back closed up. .
>
> This piano had plate screws in the right places to secure the repair. 
> I removed them and drilled through for bolts.
>
> I like to use carriage bolts with the head on the back side with 
> washers on both sides and lock washer and nut on the front.
>
> I usually bring a few lengths of bolt and if nec. cut any protruding 
> threads with a hack saw. File smooth and you have a neat repair 
> without any protruding nuts on the back to scratch the wall.
>
> Then tune, tune, tune .and to answer the question the job took a few 
> hours including a few passes to stabilize tuning.
>
> I set up follow-up tuning shortly after as we were on the cusp of a 
> season change here in N.E.
>
> Tom Driscoll RPT
>
>         ----- Original Message -----
>
>             I need to do this repair on a 46 year old Sohmer upright,
>             model 34K. I have the procedural description found in
>             Randy Potter's course but I'm looking for a rough estimate
>             of the person hours involved. (Already consulted "G" Piano
>             Works Repair Labor Guide, to no avail. But Joe, how do you
>             like that citation?) Anyone have any ideas how long each
>             bolt takes? the entire job? Any help/guidance would be
>             greatly appreciated.
>
>             Jim Frazee
>