Problem stsetch2 SNF 2011-02-22 10:51:31: Sticky roughing valve

mcvittie at mcvittie at
Tue Feb 22 10:51:31 PST 2011

During chamber pump dowm from atmoshpere, roughing valve was not oping and closing properly. Solved problem by taping on valve. I suspect the valve needs to be cleaned.

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