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Re: NEON- vacuum pump rebuild
Ron-
For what it's worth and if you're considering having a pump rebuilt; I'd
really recommend checking out an outfit in any way you can to verify the
quality of their work. I've had a bit of a nighmare going on after having
a 1402 rebuilt. The pump really sucks (no, no, really I mean 3-4 microns),
but has some "mystery" problem with it that is causing *all* units to
snake. Something they did, I'd assume, is still outgassing after weeks of
running (UGGH!), and causing this. I've done everything I can to isolate
the problem and I'm using a backup pump and not having the problem, so am
pretty confident that it's something they did.
Next time, I will pay a little extra if I need to to be confident with the
work. If you read the recent article by Wayne S. in SOT, it may help you
ask some questions of their "rebuilding" procedures.
I also have a local place, MassVac, that charges in the same ballpark that
you're mentioning that I believe is very good (not the one I used, oops)
and I think it's the one that Wayne took his to and discusses in the
article. If interested in their number, let me know.
Tom U.
>Has anybody had dealings with Johnstone Associates in Los Altos, CA? They
>have a web page at www.johnstone.com/index.shtml and are selling rebuilt
>vacuum pumps at a reasonable (I think) price. Like a Welch 1402 rebuilt
>for $550
>(pump only), they want $430 to rebuild yours and it is almost a wash with
>shipping charges from Wisconsin just to buy one of the rebuilt ones. Welch
>out of Chicago wants a min. of $495 to rebuild one and $1790 for a new one.
>Thanks for an info...
>Ron Anas
>neonron@nconnect.net
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