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MMD > Archives > December 2000 > 2000.12.16 > 04Prev  Next

Hammer Rail Lift Pneumatic in Duo-Art Grand
By Mike Knudsen

John McClure wrote in 001215 MMDigest:

> Of course, only four days before a party the toy is misbehaving.
> The hammer lift pneumatic on my 1925 Steinway Duo-Art XR is staying
> on all the time and I'm having trouble locating the pneumatic.

Very luckily, you needn't find the pneumatic, just its controlling
valve which is the third valve in the same box with your Theme valves,
to the extreme left of your spool box.

The sense line to this valve is teed.  One line goes to the tracker
bar's Soft hole, while the other side goes through the keybed to the
Soft pallet on your Normal-Soft-Dance switch.  I forget whether that
tube runs through the note blocks or through the block screwed to the
left side of the piano frame.  You have a total of three pieces of
tubing to check for leaks.

I'm assuming that your pneumatic itself or its linkage (even more
inaccessible) is not hung up, that is, the hammer rail returns to
normal when you shut off the power.

You'll have to slide your piano action out to get at the pneumatic and
linkage.  The pneumatic sits just in front of the hammer action, and
the linkage passes between a couple of hammer shanks.  Hope this helps
your holidays.

Mike Knudsen

(Message sent Sat 16 Dec 2000, 20:28:42 GMT, from time zone GMT-0500.)

Key Words in Subject:  Duo-Art, Grand, Hammer, Lift, Pneumatic, Rail

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