rough pump rebuild tips

[hfredricks]

Hello,

I know this is slightly off-topic but anyone doing MS must deal with rough pumps (you know, those noisy things under the bench that leak oil and we can't live with/out!) so here goes: we have a high-school student visiting our lab for the summer and due to h&s restrictions he can't touch most of our routine lab work, fair enough, so I thought maybe rebuilding an Edwards E2M30 might be a fun project for him. I've bought a repair kit (with vanes) and I have exploded diagrams and all that, but I was looking for some general advice on how to start & go about rebuilding a rough pump. We're all pretty handy in the lab, but no one has done this before. Advice, anyone?

thanks, as always, Helen

[Consumer Products Guy]

From my auto mechanic experience:

(1) Use labeled sandwich bags for parts from each sub-assembly

(2) Take lots of good digital photos, draw diagrams. Funny, we think we remember which side of soething faced which way? Hey, the new part doesn't have that ridge?

[mckrause]

An M30 is a pretty big pump. In general, all rough pumps are relatively easy to work on, since the principles involved are simplistic. However, you're talking about having to move heavy iron in this case. Breaking the seal to open the case is going to be a real job.

[dim56625]

Hi Helen,
make sure that there will be enough space on your bench. Be extremely carefull with item 92 it is sometimes extremely difficult to replace it. You have the exploited view that came with the clean and overhaul kit but in any case you can find it in the link below.

http://1.bp.blogspot.com/-Bhm4s5WAz8A/T ... titled.png

If everything goes well you will get a vacuum of 3 to 4 x10-3 mbar

Good luck
Dimitris