[Phono-L] 4 spring credenza motor problem

[Ron L]

The owner of the machine said that even with the thump, it played more than
three sides.  However, the thump was so bad at one point that the needle
jumped.  I winder if it was so bound up that one or more of the springs
acted as if they were smaller/under more tension and so powered the motor
longer but not the full 20 min.   I also suspected that the springs may have
'softened' over time but I will try George Vollema's gear suggestion before
I do anything else.

Ron L

-----Original Message-----
From: phono-l-bounces at oldcrank.org [mailto:phono-l-bounces at oldcrank.org] On
Behalf Of Bob
Sent: Thursday, April 30, 2009 11:56 AM
To: Antique Phonograph List
Subject: Re: [Phono-L] 4 spring credenza motor problem

Ron,
    Did you wind it fully and play it before you changed the grease to 
eliminate the thumping?  If so how long did it play?  A good four spring 
motor should run about 20 minutes.  If it didn't, it's possible that the 
springs have lost some temper and are weak.    The only other possibility is

a bad record or needle but I'm sure you thought of that.
Bob
----- Original Message ----- 
From: "Ron L" <lherault at bu.edu>
To: "'Antique Phonograph List'" <phono-l at oldcrank.org>
Sent: Thursday, April 30, 2009 10:47 AM
Subject: RE: [Phono-L] 4 spring credenza motor problem


>I do have an electric C.   This is a repair for someone else.  The neat
> thing about the clip end/bent end springs is that it is impossible to
> assemble them into the cans in the wrong direction.   It is easy to mess
> them up when you have rivets in the cans and holes on the springs.  They 
> do
> not wind up, and in fact will distort the spring centers, with the real
> potential for breaking them.
>
> Ron L
>
>
> -----Original Message-----
> From: phono-l-bounces at oldcrank.org [mailto:phono-l-bounces at oldcrank.org] 
> On
> Behalf Of Douglas Houston
> Sent: Thursday, April 30, 2009 10:05 AM
> To: Antique Phonograph List
> Subject: RE: [Phono-L] 4 spring credenza motor problem
>
> This is a sticky one. I have a long shot thought. Victor has a procedure 
> in
> the service notes, that tells you whichn spring to load in the barrel, and
> its direction of winding.Is it possible that one of the springs could have
> nbeen installed in reverse? I'm not even sure if the motor could be nwound
> if that were done, but as I've said, it's a long shot.
>
> I have one of those 4 spring jobs apart now, and I've got to study the
> thing a lot before I re-pack the springs.
>
> (Maybe if you got one of those electric Credenzas like I have, you 
> wouldn't
> have this mess!!!!)
>
> Cheers
>
> Doug. Houston
>
>
>> [Original Message]
>> From: Ron L'Herault <lherault at bu.edu>
>> To: Antique Phonograph List <phono-l at oldcrank.org>;
> <phonolist at yahoogroups.com>
>> Date: 4/29/2009 10:55:02 PM
>> Subject: [Phono-L] 4 spring credenza motor problem
>>
>> Hokay, list experts.  I need help.  The original problem was thumping
>> springs.  So, you take them out (done that many times) clean them, and
>> reinstall/relube. This should be pretty straight forward.  And these are
> the
>> ones with the clip outer ends and bent over inner ends.  They only go
>> together one way.  It winds up fine but only plays 4 sides before it
> starts
>> to loose power and slow down when you try to play the 5th side. 
>> Sometimes
>> it makes a bit of a scraping sound but nothing is hitting the turntable.
>> What have I missed?
>>
>> Thanks,
>>
>> Ron L
>>
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>
>
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>
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