Dear Richard, Ron, List;
Thanks for your info. The tracker bar has only one hole with one tube leading to the valve. I'm going to order a new valve.
Daryl Matthies
West Bend, WI
pianotec@hnet.net
-----Original Message-----
From: Richard Moody [SMTP:remoody@easnetsd.com]
Sent: Wednesday, May 07, 1997 9:42 PM
To: pianotech@byu.edu
Subject: Re: Sting Player Shut-up
Just a guess as I havn't seen a Sting since 1978 or so. But the
valve that shuts off when you put your thumb over top hole, (the one
to atmosphere) usually means the valve stem is slow in rising, which
means the pouch is not getting enough air, or is leaking. (Or rare
that a mouse leaked on the valve stem and it is corroded thru the
guide). Its not getting enough air because the path from the hole in
the tracker is obstructed, or it is leaking some where along the
line. The first place to check for a leak is to make sure the valve
unit is screwed down tightly. Now this is where I forget how the
shut off mechanism works. If it is not mechanical, ie the flapping
paper after reroll hits a switch, then there must be two valves in
case one gets triggered by a tear in the roll, just as there must be
two valves for rewind else a tear trigger that. These valves have to
be triggered from the tracker bar and so as not to interfere with the
music they are usually the outer ones the ones closest to the edge of
the roll that frequently has tears in it. So the better players used
two holes to trigger reroll and shut off. The Sting does not fit
into this category, so you may be dealing with one valve, that is
activated by one tracker bar hole. Check that valve and see if one
or two tracker bar sized tubes run into it. Also check the tubes
themselves. Its been almost 20 years now, some may be getting
brittle and cracking or loosening around the brass connector tubes.
If all fails try replacing the valve. They can be ordered from
Player Piano Co in Kansas. Ask for a service manual also.
As to why putting your thumb over the opening makes the valve work,
you need a stop action diagram of the workings of the tracker bar
hole, the pouch, the bleed, the valve, and its two seats, and the
valve's connection to the chest vacuum and pneumatic. The seat could
be leaking, but you would hear a hissing sound. Also the linkage to
the switch should be able to be adjusted so that the pneumatic
doesn't have to go all the way closed to flip the switch. Slow valve
= slow pneumatic. Cheap way to "work around" the problem.
Richard Moody
PS If you are ever near the Bay Area, I can put you in touch with
the ultimate modern player piano guru. Or Minneapolis, his twin
brother is just as good.
PPS If you came up with the scotch tape "solution" yourself, you
should consider getting into player pianos more. Its like greasy
grimmey, smelly, knuckle scraping automobile engines, They are either
a marvel, or a madness.
----------
> From: Daryl Matthies <pianotec@hnet.net>
> To: 'pianotech@byu.edu'
> Subject: Sting Player Shut-up
> Date: Wednesday, May 07, 1997 7:50 PM
>
> Hi all,
>
> Players are not my favorite subject, but I serviced an Aeolian
Sting the
> other day that wouldn't shut off after the roll rewound. I fixed
the
> little bugger by taping off about 3/4 of the hole on the shut-off
valve.
> After cleaning the tracker bar, checking the reroll tubing, reroll
> pneumatic and cherry switch, I just couldn't figure out what could
be the
> culprit. I stuck my finger over the shut-off valve and it quit.
Now I
> know it works, but why? I was told by a player guru that shut-off
valves
> almost never go bad. Maybe this one did!
>
> Thanks folks,
> Daryl Matthies
> West Bend, WI
> pianotec@hnet.net
>
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