4988Jittery / vibrating group pressure gauge needle
- Aug 4, 2014
Is it common for my pressure dial to bounce / oscillate between 8-9 bar when pumping water through the group? I think there might be a problem with my pump's bypass valve, but I want to know if it's normal before I spend much time/money on this.
Things I've done to diagnose:
Blvd air from lines by building pressure and cracking open compression nut to the pressure gauge line: no change
Blank portafilter: pressure builds up to a steady ~10 bar.
Cleaned / lubed bypass valve nut o-ring: it leaked for a little while afterward but hasn't fixed the issue
Things seem to work fine otherwise. Still need to work on perfecting my technique.
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