Phil Guillor very kindly verified that the disconnect does work. The second is that the machine be restarted in the presence of ORS staff so an immediate survey can be performed. The two requirements will probably add less than a day to the downtime. At long last we have an on-line manual for mbe2. Because the machine is almost entirely hand-operated the identification of valves is very important.
Annotated photographs are the best way to let users know which valve does what.
Taking the pictures is fairly easy, and linking them into the web page is also fairly easy. The text portion of the manual is up, the pictures will follow as soon as practical. The adjustment was re-set and the pump restarted without incident. The temp rose to about 25 K and the valve didn't close. Second, when the water sensor trips it's impossible to manually close the main gate valve.