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Yamaha, letoff buttons blocking jack adjustment #2868308
07/11/19 09:16 AM
07/11/19 09:16 AM
Joined: Jan 2019
Posts: 249
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jsilva Online content OP
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jsilva  Online Content OP
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Joined: Jan 2019
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I was working on a Yamaha small grand the other day and I wanted to move the jacks slightly forward since they are too far back on the knuckle (quiet playing is a little difficult), but the let off buttons were completely blocking access to the adjusting screws.

I assume there is a way of adjusting them without removing entire letoff rail (if it’s even removable...) and I figured someone here knows how smile

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Re: Yamaha, letoff buttons blocking jack adjustment [Re: jsilva] #2868336
07/11/19 10:36 AM
07/11/19 10:36 AM
Joined: May 2012
Posts: 176
Surrey, UK
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Adypiano Offline
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Surrey, UK
Some of them are rather tricky to get at...

I have an adjuster with a shaft that's about 1.5mm diameter (it's wire really) which I have to use now and then on the more tricky actions.

Usual access is by poking around between the jacks and the setoff buttons, angling the regulating tool up towards the adjuster. I do this with the hammers towards me (from the back of the action) and lift a handful of hammers up out of the way so I can see the adjuster I'm working on (be very careful of the upstanding hammers when reaching around the front of the action!).

A bright lamp or torch is very helpful too smile


Started work at the Blüthner piano re-building workshop in Perivale, UK, in 1989. Self employed since 2000. Learning something new about pianos every day... smile

http://www.hamiltonpianos.com/
Re: Yamaha, letoff buttons blocking jack adjustment [Re: jsilva] #2868487
07/11/19 07:08 PM
07/11/19 07:08 PM
Joined: Jan 2011
Posts: 1,649
Canberra, ACT, Australia
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Chris Leslie Offline
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Chris Leslie  Offline
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Canberra, ACT, Australia
I have grinded down thinner a part of the shank of my adjusting tool in order to get between the let off buttons.

There is also nothing wrong with removing the hammer rail with hammers and buttons attached to give you easy access to the whippens. It might be preferable if there is a lot of adjusting to do.


Chris Leslie
Piano technician
http://www.chrisleslie.com.au
Re: Yamaha, letoff buttons blocking jack adjustment [Re: jsilva] #2868533
07/11/19 09:51 PM
07/11/19 09:51 PM
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Posts: 270
Georgia, USA
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RestorerPhil Offline
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Georgia, USA
On a couple of Young Changs recently, I just removed the let-off rails for that task. When the very fat wooden dowels are so tight, it is worth the effort, which isn't as bad as fighting it.

I think I have done it on a couple of Yamahas as well. I need a skinny tool.


Lavender Piano Services
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Re: Yamaha, letoff buttons blocking jack adjustment [Re: jsilva] #2868538
07/11/19 10:04 PM
07/11/19 10:04 PM
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New Hampshire
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P W Grey Offline
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P W Grey  Offline
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New Hampshire
I migjt be mistaken but if you lift the whippen with one finger up to or through let-off, does not the adjustment screw rise to a point that is more accessible above the let off barrells?

Pwg


Peter W. Grey, RPT
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www.seacoastpianodoctor.com
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Re: Yamaha, letoff buttons blocking jack adjustment [Re: P W Grey] #2868641
07/12/19 07:33 AM
07/12/19 07:33 AM
Joined: Oct 2006
Posts: 2,646
Strong, Maine
David Jenson Offline
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David Jenson  Offline
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Strong, Maine
Originally Posted by P W Grey
I migjt be mistaken but if you lift the whippen with one finger up to or through let-off, does not the adjustment screw rise to a point that is more accessible above the let off barrells?

Pwg


That's the first thing that came to my mind. I seem to recall doing that on several different actions.


David L. Jenson
Tuning - Repairs - Refurbishing
Jenson's Piano Service
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Re: Yamaha, letoff buttons blocking jack adjustment [Re: jsilva] #2868650
07/12/19 08:15 AM
07/12/19 08:15 AM
Joined: Jan 2019
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jsilva Online content OP
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Thanks for the tips everyone! I plan on going back in the next few days and give things a try.

Re: Yamaha, letoff buttons blocking jack adjustment [Re: P W Grey] #2868681
07/12/19 10:03 AM
07/12/19 10:03 AM
Joined: May 2012
Posts: 176
Surrey, UK
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Surrey, UK
Originally Posted by P W Grey
I migjt be mistaken but if you lift the whippen with one finger up to or through let-off, does not the adjustment screw rise to a point that is more accessible above the let off barrells?

Pwg


Often the case! However, I've seen quite a few pianos (plenty of Style-IV Blüthners while I was an apprentice...) where the barrels were only a couple of millimeters from the underside of the hammer rail; hopefully not the case on JSilva's piano! smile


Started work at the Blüthner piano re-building workshop in Perivale, UK, in 1989. Self employed since 2000. Learning something new about pianos every day... smile

http://www.hamiltonpianos.com/
Re: Yamaha, letoff buttons blocking jack adjustment [Re: jsilva] #2869828
07/16/19 12:57 PM
07/16/19 12:57 PM
Joined: Jun 2005
Posts: 252
Fitzgerald ,GA
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Steven Bolstridge Offline
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Steven Bolstridge  Offline
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Posts: 252
Fitzgerald ,GA
The tool needs to be perpendicular to the jack as much as possible. If not the screw may break off.


piano tuner/technician
Re: Yamaha, letoff buttons blocking jack adjustment [Re: jsilva] #2870351
07/18/19 02:24 PM
07/18/19 02:24 PM
Joined: Jan 2019
Posts: 249
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jsilva Online content OP
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jsilva  Online Content OP
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I was back there this morning and ended up taking off the letoff rail. It was quite easy, just maybe 10 nuts and it came out in 3 parts. That made the jack adjustments easy!

Thanks for all of the input.


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