[3dem] Gatan 655/626 Maintenance

[Patricia Grob PhD]

Hi Bradley,

Taking the gauge off, shaking out debris (tap upside down over a paper towel) and blowing compressed air should take care of the stuck needle on you pumping station if it was mostly unused. If a more thorough clean up is needed you can take the gauge apart and scrub the parts inside with a non-magnetic scrub pad before rinsing with ethanol, drying and putting them back together. Make sure not to damage the cathode though (plug with protruding metal rod), it has a thin needle at the base that is very fragile so don't touch it during cleaning. 

Let me know if you need more detailed instructions.

Patricia

_________________________________
Patricia Grob, Ph.D.
Research Specialist
Nogales Lab
HHMI at UC Berkeley
Molecular & Cell Biology Department / QB3,
Stanley Hall #742
University of California, Berkeley
Berkeley, CA 94720-3220
Phone: (510)666-3335	Fax: (510)666-3336
E.M. suite B307: (510)666-3339
URL: cryoem.berkeley.edu
Email: pgrob at berkeley.edu



> On Dec 18, 2023, at 9:43 AM, Guilliams,Bradley <Bradley.Guilliams at colostate.edu> wrote:
> 
> Hi Everyone,
>  
> We have a Gatan 655 Turbo Pumping Station and 626 Cryo Transfer Holder that have sat unused for a number of years. The pumping station has been ‘on’ consistently pulling vacuum on the 626 holder, but the gauge is not working. I was hoping the community had a lead on replacement kits for the Diaphragm pump and the MDP (originally Kit #10546 and #05577, respectively) as no maintenance has been done on the pumping station for at least 3-4 years. The instruction manual that I have for the 655 has instructions to ‘service the Cold Cathode Gauge Tube’ which essentially entails blowing it out with compressed air—how often does this actually fix the gauge when it the needle is reading/stuck to the far-right of the gauge?
>  
> Any advice here or leads on replacement parts would be much appreciated.
>  
> Cheers,
> Bradley
>  
> Bradley F. Guilliams (he/him)
> PhD Candidate
> Ackerson Research Group
> Department of Chemistry
> Colorado State University
>  
> Biological Electron Microscopy GRA
> Imaging & Surface Science
> Analytical Resources Core (ARC-ISS)
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