[Jukebox-list] Help! Rock Ola Tempo 2 Jukebox speed is about 40 RPM

[Ray Finch]

Hi Bill,

Funny it's called a Rock Ola Tempo and it's running slow! <G>  I pulled up 
a pic of it on Google - good looking machine!

If it uses a 115V AC motor, then almost certainly the replacement idler 
wheel is the wrong size or has another issue.  The speed of an AC 
(brushless) motor is set by the frequency of the AC current (60Hz).  As 
long as the motor is getting 60Hz it can't go any faster or slower.  The 
only thing that could cause it to go slower is friction - or appear to go 
slower would be an issue with the idler wheel.  Does the motor spin freely 
by hand?  Have you tried putting the old idler wheel back on?  If the old 
idler wheel runs the turn table at the right speed then there is an issue 
with the replacement idler wheel.

One other possibility: Does the motor shaft have two levels on it, one 
smaller than the other?  If so then perhaps the new idler wheel is 
elevated and riding on the smaller (33-1/3) level.  That would certainly 
make the turntable run slower even if everything else seems okay.  Check 
to see where the idler wheel lands on the motor shaft.

Is there some space between the top of the new idler wheel and the "C" 
clip holding it on?  If so then perhaps the idler wheel is riding up when 
the motor is on causing it to run on the 33-1/3 level.  If that is the 
case then you might need some washers between the idler wheel and the "C" 
clip.  On a recent Rock-ola I put back together a replacement idler wheel 
_almost_ rode on the 33-1/3 level.  Putting a couple of washers on over 
the idler wheel fixed that.

Does this jukebox support 45RPM and 33-1/3RPM?  Maybe it is stuck in the 
33-1/3 mode?

Ray Finch


On Sat, 3 Nov 2007, James McClave wrote:

> Bill, a couple of possibilities here. Are you sure you replaced the
> idler wheel with the correct size ?  Also ,  you might try plugging in
> the turntable direct to 115V  to see if there is any change, thus
> eliminating anything in your power supply.  For a temporary fix you can
> increase the diameter of the motor end piece which engages with your
> idler wheel by neatly wrapping some cloth-type electrical tape around
> the end piece. To get 5 more rpm, one time around or two times around
> should get it.  You can achieve the same effect by putting a layer of
> the same type tape on the inside rim of the turntable itself.  These are
> just temporary "fixes" to get it up to speed. The motor itself may be
> going bad , possibly a complete dis-assembly of the motor , cleaning and
> lubing may be required.   Jim
>
> E-mail us at: trollmasters at webtv.net
>
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