Yamaha C7

[Robert Moffatt]

List,

Sorry.......Forgot to sign the reply to Roger re: Yamaha C7

Bob Moffatt  (Yamaha Factory Trained Tech)
Calgary, Alberta
Canada




----- Original Message -----
From: Robert Moffatt <moffattr@cadvision.com>
To: <pianotech@ptg.org>
Sent: Sunday, December 05, 1999 12:51 AM
Subject: Re: Yamaha C7


>
> ----- 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
> >
>