It should not be necessary to remove the upper stack (the "pipe"). One
Bruker Service Engineer in Germany told me, that the easiest way to clean
the upper stack is to form a ball of kimwipes, put a little ethanol on it
and then push it with a broom-stick through the pipe a few times.
This actually works quite well.
Some tips:
Of course non-magnetic tools are a must, and I think that Bruker used to
include a few screwdrivers in their package.
It might be a good idea to have a second person catch the shim assembly
when you loosen the screws.
Mark the outline of the shim assembly on the bottom plate. you can twist
it by several degrees when the screws are not completely tightened.
On Thu, 6 Nov 1997, Glenn Facey wrote:
> Dear Members:
>
> I have been having problems recently on my AMX-500 (Oxford 500, 51
> mm bore, standard Bruker shim set, standard sample transport
> system) with sample spinning, samples falling into the probe
> properly and large Q-modulation sidebands on an inverse probehead.
> Initially I thought the problem was with the probe. This, however
> is not the case. I now think that I must take out the spinner
> assembly and clean it. This is done by loosening the three long
> screws on top of the upper shim stack and removing the lower shim set
> and spinning assembly. I am a bit nervous in doing this. Is there
> any advice out there aside from the obvious screwdriver-suction
> problem.
>
>
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Juergen Schulte ! !
NMR Specialist U
Department of Chemistry ~
SUNY Binghamton Phone: (607) 777-4405
Binghamton, NY 13902-6016 Fax: (607) 777-4478
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schulte@binghamton.edu schulte@chemiris.chem.binghamton.edu
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