Question:
I have a Wurlitzer 1100 and need to take apart the motor for cleaning and
lubrication. The manufacturer of the motor is Emerson. How does this work? Does
this motor have motor brushes?
Answer: The Emerson motor is, in my opinion, the "standard" motor used in
W1015, W1080 and W1100. It is an AC motor and has no brushes.
This motor has two windings inside, one for "normal" run and a second one, which
is connected to the other when the motor starts (for more power in the first few
seconds, when the motor starts).
This second. winding for the first few seconds after the start is switched by a
centrifugal force connector, located in the rear part of the motor.
To open the motor is easy:
Unscrew the 8 nuts and take out the 4 long metal bars.
Take an old knife and find the line between main body of the motor and the front
cover (A-side of the motor).
Try to lift the front cover a little bit and take it away.
Now you can take out the armature.
Lift the rear cover of the motor carefully (the same way like the front side),
but be careful because on the inside of the rear cover are 4 wires connected:
two wires for an overload protection (mostly no longer working after 50 years)
and
two wires for the centrifugal force switch
If you have lifted the rear cover, you can unscrew the overload protector and
the centrifugal switch (be careful because the isolation of these wires is often
brittle and they loose their cloth covering easily.
After cleaning all parts, lubricate the centrifugal force mechanism at the rear
side of the armature and fill up the small oil reservoir inside the front and
rear motor cover (there is wool inside to hold the oil, so take time to fill
these reservoirs).
After these steps you can assemble the motor again.
Important:
The motor was build for 115 V AC and 60 Hz and it turns 1140 RPM with the 60 Hz.
If you connect the motor to 115 V AC 50 Hz, the motor turns only 950 RPM
(1140 : 60 = 19 and 19 x 50 = 950).
With these 50 Hz it is possible that the centrifugal force switch do not open (some
motors shows that).
Please read the following...it is important !!
If you test the motor with 115V AC and 50 Hz, the centrifugal force switch
should open after some seconds after connecting to the 115V line (you can
control that by using an ampere meter: if the centrifugal force switch has not
opened, you hear the motor hum and the ampere meter shows more than 10 A (AC);
if the switch opened fast after a few seconds, the current is only 1,2 A (AC)).
If you run the motor with closed centrifugal force switch for minutes, the
second winding would be damged because of the high current (more than 10 A
(AC)).
Without this second winding, the motor cannot start and you have to rewind the
complete motor (is expensive).
Frage:
Der Motor unserer Wurlitzer 2000 macht seit kurzem beim Drehen des
Plattenmagazins teilweise recht unschöne, kreischende Geräusche, so dass ich
glaube, dass er mal gesäubert und neu gefettet werden muss. Wie komme ich am
besten an ihn heran?
Answer: Der Selector muß abmontiert werden, um zum Motor zu
kommen. Er ist nur mit vier Schrauben angeschraubt und auf der Unterseite sind
fünf Stecker angesteckt. Zum Abmontieren dreht man das Plattenmagazin so, daß
der Sucherarm senkrecht nach unten steht. So kann man den Sucherarm am besten
ausfädeln. Die Schrauben befinden sich am inneren Rand der Selector -
Grundplatte. Durch das Abmontieren werden keine Einstellungen verändert, es
braucht also beim Zusammenbau nichts neu eingestellt zu werden.
Die Angaben haben keinen
Anspruch auf Vollständigkeit oder Richtigkeit.
Bei den (importierten) Boxen können im Laufe der Jahre durchaus
Veränderungen vorgenommen worden sein. Copyright.
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