ALWAYS NUMBER THE BELLOWS BEFORE STARTING ANY WORK

If the cloth on the striker bellows (pneumatics) is at all stiff, it should be replaced. There is no "easy way" to remove the strikers from the tier, but there are techniques for reducing the damage. The one I use most often, when the deck boards (the board that's glued to the tier) are either thin or reluctant to break off cleanly, involves heat. Basically, I cut open the bellows, fold the moveable boards back and out of the way, and then heat the deck boards with a clothes iron (set on Low) for a few minutes. Initially, you need to check how things are going every few minutes. If the board is reluctant to move, heat for a few more minutes. This usually softens the original hide glue to the point where the bellows will come off easily. To avoid warping or accidentally cracking the board in half when I take it off the tier, I use a heavy straight edge (like a chisel) and move the board off sideways. (see diagrams below the video).

Here's the link to the full size video at YouTube
https://youtu.be/jMjshmWi8n4

The other more common technique is to chisel the deck boards off of the tier. There are basically two tricks to getting the deck boards off with the minimum of damage. First, using a strong, sharp knife or a thin, sharp chisel, cut away the hide glue around the perimeter of the board. This is quite a bit more important than it might otherwise seem. The reason for removing the glue before attempting to chisel off the board is that the glue creates a very strong bond between the cloth and the tier. Breaking that bond greatly reduces the amount of force needed to remove the board from the tier. A second benefit to removing the glue first is that you are, in effect, scribing a very clear line which shows exactly where the board is located. This makes putting them back 'on' quite a bit easier. (Why this is important -click here.) The second trick is to carefully watch how the board is 'splitting' away from the tier. If it appears to be cracking in the same direction as the chisel angle, attack the bellows from the opposite end. If it seems to be cracking in the same direction again, attack the available side of the board. By attacking the board a little at a time from all possible directions, the amount of breakage will be reduced.

Here's the link to the full size video at YouTube
https://youtu.be/sEZYV77SY6A

Further, I have a basic "Rule of Thumb" when it comes to removing the deck boards. If I break three boards in a row, or if the total number of broken boards reaches six, I use the iron. Mind you, using the iron might not be practical in every case. If the valves and/or the pouches are in close proximity to the deck boards, they will get ruined by the heat. The same is true for any leather gaskets that are close by. So choose your method wisely!!

With regards to making sure that the bellows goes back where it belongs, the main reason has to do with the alignment of the sticker wires and striker fingers. If the bellows aren't in the right place, the wires or rods that are connected to the bellows won't be traveling straight up and down. This can cause a few different problems; like rubbing against the bellows on other tiers and/or causing undue wear on the felt bushings in the striker fingers.

Lastly, if by chance you are working on a unit that was previously rebuilt, care should be taken to insure that the bellows get put back in the right place. Generally speaking, this can be accomplished by accurately marking the position of the hole in the bellows and then making sure that the hole in the bellows aligns with the hole in the tier. This is accomplished by putting alignment marks (in pencil or chalk) on the outside edges of the bellows and the hole. In some makes of player actions this is extremely important because the valve stems stick out of the chest, and if the bellows is mounted too close to the inside edge, it could prevent the valve from fully opening -creating a large vacuum leak and causing the note not to work properly. When in doubt, the best approach is to clamp a few bellows to a tier before they're glued to the valve chest to make sure that there's clearance between the valve stem and the hinged end of the bellow.

=============================MORE INFORMATION=========================

Here's an email that arrived on January 26, 2004, and my response. It deals with removing the stationary striker boards when they have been previously glued down with a carpenter's type glue.

At 09:03 AM 1/27/04, you wrote:
John , 

I'll try to be brief.

I've been in the player piano field since 1980, filling my own local niche.
(Enough back ground) I now have a player in the shop that has the pneumatics 
reglued on the decks with what looks to be titebond or similar,about 20 years 
ago.I've been spared having to deal with this situation till now(i can't believe 
it) But I have had to deal with Elmers glued air motor boards, bellows cloth,
and the Perfex, PVC to wood mess. I have never seen anything written to actually 
deal with this problem, only that many have dealt and do.. and not to use the 
wrong glue pep talks for the novice...yada, yada, yada.

My only experience with yellow glue near this area ,is reconstructing poorly 
glued heavy joints that have fail from poor fitting.,,but not on player actions 
(so far)or delicate parts. I expect to make new stationary boards. It's 
preventing too much deck damage and salvage I'm concerned with.

Hope you can direct me to some helpful info..or a least moral support.

My regards,

David M. Saleh 
Player Piano Restorations,  Waterbury Conn.

P.S. Action is a Double Valve Standard in a 1914 York(Weaver) piano

---------------------------answer--------------------

Hi David,

There are really only two choices. One is quick and requires good 
tools and a high degree of accuracy. The other is hot and messy, 
and requires a lot of patience.
 
The quick way is to saw off the stationary boards with a table 
saw or a good band saw. The only trick is getting everything set 
up correctly so you don't remove any of the wood from the tier. 

The second method is to use a steam iron and super-heat the 
stationary boards until they come off easily. Once the moveable 
boards and hinges have been removed, you can usually heat 3-4 
boards at a time. I set the iron to the highest setting and leave 
it sitting on the boards for about 3-4 minutes - until the wood 
discolors or starts to smoke..... ;-) Then, using channel-lock 
pliers or a heavy metal straight edge, I move the boards sideways 
(not "up" like you might be inclined to think). This prevents any 
of the wood on the tier from accidentally pulling away - if the 
glue hasn't softened enough. If the pieces are reluctant to come 
off, apply heat for a couple more minutes. If they are still 
reluctant to come off, get a terry cloth towel, saturate it with 
water, lay it over the boards, apply the iron, and create "major 
steam". (This can be very dangerous because the steam will 'burst 
out' from around the edges of the iron and rise very quickly. It's 
best to wear heavy gloves to prevent the possibility of getting 
burned.)

You might wonder why I shy away from using steam in the first 
place. It's because that much steam, used over the entire length 
of the tier, will have a tendency to warp the tier. 

Sorry I couldn't be more brief.........

Lastly, considering your experience, would you consider a free 
player technicians listing at Player-Care? If so, just fill in 
the form at:

https://www.buysecure.com/playercare/techform.html


Musically,

John A. Tuttle
Player-Care.com
Brick, NJ, USA
=============================================

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