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- Posts: 114
- Joined: Fri Oct 22, 2010 8:53 pm
- Location: San Francisco Bay Area, United States
- Roughing pump appears to be working fine. It was completely rebuilt in 2017 due to oil leaks. Oil was recently changed (it looked good) and there are no oil leaks. We confirmed ballast is off, and mode is set to maximum vacuum.
- The foreline at the roughing pump had hardened considerably, so we cut off about a foot to where it became more flexible. No improvement. In fact, it seems like anything we do with the foreline makes matters worse. If it were easier to do, I'd probably just replace the foreline entirely, but I don't see how to get to it at the turbo pump end.
Again, it doesn't appear to be a leak at any of the common leak point; I've dealt with those in the past, but this doesn't seem like any of those.
Any ideas/suggestions what else to check?
Thanks
John