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Old 13th Oct 2017, 5:40 pm   #21
Nickthedentist
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Default Re: Grundig RC400 Turntable Help

Amazing!

But does it help you get the deck out of the radiogram?

Can you take the back off and peer in from underneath with the aid of a torch to see what's going on?

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Originally Posted by imull2001 View Post
The oil has helped, it now turns by hand but is still quite stiff. It still doesn't turn when energised.
When behaving, with the power disconnected, you should be able to give the pulley a sharp spin with your fingers, and expect the rotor to carry on spinning for a good few seconds.
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Old 13th Oct 2017, 5:48 pm   #22
imull2001
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Default Re: Grundig RC400 Turntable Help

OK, at the moment it only rotates with reasonable force from myself and certainly doesn't spin freely.

I can't get the back off easily to see. I've tried an endoscope but it's quite dark in there!
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Old 13th Oct 2017, 5:53 pm   #23
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Default Re: Grundig RC400 Turntable Help

Is there a model name as well as number? It might help if we know that plus some photo's of the radiogram if that's what it is?

Lawrence.
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Old 13th Oct 2017, 6:05 pm   #24
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Default Re: Grundig RC400 Turntable Help

It's a Mandello. Until your post I didn't know that the radio is the RC400!
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Old 18th Oct 2017, 8:50 pm   #25
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Default Re: Grundig RC400 Turntable Help

I dont have one in front of me but the way you get it out (if its the model I'm thinking of) is by lifting the front of the deck up as far as it will go (not very far) and you will see the release mechanism which you slide to one side I think to the right, it does work but is easier said than done.

You cant dismantle the motor as its riveted, but what I do is soak it for some time in alcohol and rotate the spindle till its free.

Allow the alcohol to dry off, then re-lubricate with sewing machine oil. BTW,its the bottom bearing that causes the problem so dropping oil down the top bearing wont really help.
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Old 24th Oct 2017, 6:23 pm   #26
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Default Re: Grundig RC400 Turntable Help

Thanks Michael, I'll give that a go. I think I know the bit you're talking about.
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Old 24th Oct 2017, 7:42 pm   #27
imull2001
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Default Re: Grundig RC400 Turntable Help

Got it out, Michael you're a star!

Now to soak the motor and get it up and running.
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Old 5th Nov 2017, 9:36 pm   #28
imull2001
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Default Re: Grundig RC400 Turntable Help

OK, so I've got it back up and running however the playback of 12" and the autoload is a bit hit and miss. I'm not sure if something is bent or if there is a tight spot due to old grease as the turntable seems to 'bog down' at times.

Any hints on what this might be?
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Old 5th Nov 2017, 11:06 pm   #29
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Default Re: Grundig RC400 Turntable Help

Why just on 12"? Old grease must be removed before you can really judge this.
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Old 6th Nov 2017, 11:29 am   #30
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Default Re: Grundig RC400 Turntable Help

Heavier (i.e. 12") records can sometimes cause an autochanger to grind to a halt if the drive to the platter is marginal or the mech is sticky and harder to drive than it should be.
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