Hi Joseph,  In response to your question on suction box motor failure,
the first thing that comes to mind is the brushes, especially if it's
an older motor.  As the brush wears, the brush holder should allow the
brush to advance toward the armature.  If the brush gets hung up, even
the slightest bit, it will lose connectivity. It may look like it's
connected, but it isn't.  Always tap on the brushes to see if they are
in contact with the commutator.

I buy a lot of motors for the Bergytone pumps I produce, and the
thermal fuses that are offered by makers like Ametek/Lamb are not
self-resetting -- they are one-time fuses -- and these are only offered
on the high-end pump motors that are quite expensive.  So if Lee Music
Mfg. had put a fuse in there, and it had opened, it wouldn't have reset
itself.  It would have been obvious on it's location, too, as I'm sure
it would have been mounted to the frame somewhere.

The fact that it did it once to you means it will probably quit running
again to your customer.  You may want to take the brush assembly out
enough to blow out the dust in the holder and verify that the brush
has free movement.  New brushes can be purchased, but it may be more
economical to buy a new motor.  Give me a call if you need one quickly,
I always have some in stock.

Eric Bergstrom - Pianopro Service & Bergytone Products
tel.: 1-630-772-1958
bergytone@yahoo.com.geentroep [delete ".geentroep" to reply]