Yamaha C7

[Robert Moffatt]

----- Original Message -----
From: Roger Jolly <baldyam@sk.sympatico.ca>
To: <pianotech@ptg.org>
Sent: Saturday, December 04, 1999 10:27 PM
Subject: Re: Yamaha C7


> Hi David,
>              This has worked for me, and seems long lasting.
> 1. Remove the wippens

OK

> 2. Unhitch the rep springs

OK

> 3. Clean the ends of the springs with naptha.

Naptha?? A clean cloth does the job!

> 4.  Take a vertical hammer shank and sharpen the end with a pencil
> sharpener, it makes an ideal to burnish the slot.
> 5. Burnish the slot vigorously with the shank, resharpen as required.
> 6. With a small artist brush coat the bottom of the slots with dag.
> 7.  Reburnish with the sharpened shank.

Burnish... OK....Yamaha doesn't use dag.

> 8.  Reassemble and budget for a major reg.

Eliminating the the "friction" in the rep spring groove constitutes "major
regulation"????

> Hope this helps.
> Roger
>
>
>
> At 11:14 PM 03/12/99 -0800, you wrote:
> >List,
> >
> >I worked on a Yamaha C7, #5070074, about 8 years old.  I
> >noticed a odd clicking, frictioney sound and feel.  I removed a
> >wippen and found green "emrylon"? in rep spring groove.
> >Where the spring contacted the groove the emrylon was gone
> >and there was a wood/white spot.  I'm not sure if there is a
> >dent in the groove but a drop of Protek temporarily? fixed it.
> >Worked smooth as can be.  What is the correct lube here?
> >Should I smooth groove with a cuticle stick or such?  Is this a
> >warranty item?
> >
> >David Ilvedson, RPT
> >David Ilvedson, RPT
> >Pacifica, CA
> >ilvey@jps.net
> >
> Roger Jolly
> Saskatoon, Canada.
> 306-665-0213
> Fax 652-0505
>