Yamaha problem

[Robert Moffatt]

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----- Original Message -----=20
From: Roger Jolly <baldyam@sk.sympatico.ca>

Subject: Re: Yamaha problem


> Hi Avery,
>                Some of the older Yamaha bushing clips suffer from =
metal
> fatigue and bend. Don't try bending them unless you have a spare. =
OOPS!
> darn. How do I know. OOPS.
> The left hand bushing takes a beating over time, most often just =
rebushing
> the clip solves the problem.
In 26 years of Yamaha service...no metal fatigue. Maybe loose screws??
Rebushing will help squeaks..groans..etc. Never that much uneven damper
lift!=20
>There is a screw with a rubber foot on the action frame,at the treble =
break
> that rest against the plate web. If the rubber is fattened so you can =
flex
> the action rail inward, readjust or replace as this will increase =
stress on
> the bushing if loose.
I think you must mean "flattened" (fattened might fix it) upright action =
cap. The purpose of the
action cap screw is to eliminate the "intentional" bend in the =
"aluminium"
rail in order to achieve a straight action rail!=20
That amount of stress is insignificant pertaining to proper damper lift.
Once again...if the bushing is loose, rebush. This has nothing to do =
with
uneven damper lift! (unless the screws are very loose)  In many cases
the piano has been drooped, resulting in a "bent" action rail. Simply =
straightening
the rail will suffice.
> Make sure the bass keybed nosebolt is keeping the action secure.  The
> action may be moving before the damper starts to lift.
The action moving( before?) the dampers start to lift after
depressing the sustain pedal. We are leaving "basics" now!!!!=20
We are talking about depressing the sustain pedal first aren't we?

Bob Moffatt

No OOPS!!!


> Regards Roger=20
>=20
>=20
> At 07:42 AM 13/09/00 -0500, you wrote:
> >List,
> >
> >   I have one of our U1D's (1972) in the shop right
> >now and have a problem I haven't, as yet, been able
> >to figure out. So, thought I might get some help
> >here. :-)
> >   The problem is that the damper lift with the pedal
> >is like a hanger is broken on the rod, i.e. the dampers
> >from the lower middle of the bass up to the lower tenor
> >area hardly lift at all. The remaining ones lift fairly
> >well, even though not quite evenly. The bichords hardly
> >even move. What throws me, is that with the action out
> >of the piano and lifting the pedal rod by hand, they all
> >lift pretty evenly!
> >   I did notice that the bass end is not seated real well.
> >There is a very slight movement and a slight noise when I
> >"wiggle" the bottom of the bracket with my hand. It seems
> >to be minimal though and I will be adjusting it. But it
> >doesn't seem like that would be enough to cause the
> >problem.
> >   What am I missing? Is there something flexing somewhere
> >that could be causing this? This is one of those actions
> >with only 2 action brackets, bass and treble.
> >   I really DON'T want to do a damper wire bending job and
> >then discover the problem later and have to redo it!! :-)
> >   Any ideas? Thanks.
> >
> >Avery
> >=20
> Roger Jolly
> Saskatoon, Canada.
> 306-665-0213
> Fax 652-0505
>=20

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