ELOG Solenoid

Solenoid logbook

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Entry time:	Wed Jan 15 13:07:15 2025
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> The leak check of the cold box diff pump fittings. Found a leak at the > base of the diff pump on the tee that is apparently used to fill the pump > with oil. The fitting was removed and a plug was removed that resembled a > dip stick (approx 1" long). Tbe dip stick was charred black as if it had > been hot. The seal between the dip stick and the tee was not an O-ring. > It looked like a high temperature glue? For leak checking purposes, an O- > ring was fitted to the dip stick and reinserted in situ. Only the top > portion of the tee was removed. The lower cap was slathered in vacuum > grease. Pumping back down was slow. After two hours the vacuum was down > to 2 torr. At 6:30 pm, the vacuum was 200 mtorr, so I turned on the > filament and tried again to leak check. I was able to get the throttle > valve open a little wider than previously, but we still had a big leak. I > checked at the tee and got a strong response, but I also checked at the > diff pump connections and also got a response, albeit much less. We may > have to blank off the entire diff pump to isolate the cold box so that we > can leak check the system. Dimo said he will be able to help tomorrow. > For now, I will leave the roughing pump on the cold box and isolte the > leak detector. See you tomorrow. > P.S. I left a voice mail re: welding at TITAN 8:30 am/blankets/work > permits/extractor. cb Encoding: HTML ELCode plain Suppress Email notification

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