Hello,
I have a heavily PID'd Silvia that has recently developed a severe brew+extraction issue that I haven't been able to solve.
It started off a few months ago with the pump doing odd cycling (video here): 2012 09 03 09 15 36 - YouTube
Now, the pump isn't oscilating like above, but all my shots spray like ol' faithful:
This video best explains it: https://www.dropbox.com/s/fvsbmatzezr2818/2013-03-03%2015.25.11.mov
I've tried the following in multiple attempts to correct:
I'm thinking maybe there's a pump-issue, but before I start ordering parts I thought I'd get some opinions...
Many thanks!
I have a heavily PID'd Silvia that has recently developed a severe brew+extraction issue that I haven't been able to solve.
It started off a few months ago with the pump doing odd cycling (video here): 2012 09 03 09 15 36 - YouTube
Now, the pump isn't oscilating like above, but all my shots spray like ol' faithful:
This video best explains it: https://www.dropbox.com/s/fvsbmatzezr2818/2013-03-03%2015.25.11.mov
I've tried the following in multiple attempts to correct:
- Adjusted Grind size up and down (no affect)
- Adjusted Tamp preasure up and down (no affect)
- Tried different beans (no affect)
- De-Scaled with Citric Acid twice (no affect)
- Cleaned group head twice (no affect)
I'm thinking maybe there's a pump-issue, but before I start ordering parts I thought I'd get some opinions...
Many thanks!

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