aicaramba Senior Member Joined: 16 May 2013 Posts: 3 Location: singapore Expertise: I live coffee
Posted Thu May 16, 2013, 1:51am Subject: Need help with Rancilio S27 OPV
This is my first post and i need some help with my machine.
I own a Rancilio S27 that has been serviced. I bought a portafilter gauge to measure brew head pressure and it measured 7 bar. I tried to increase the pressure by tightening the screw on the OPV and it went up to 8 bar. When i try to increase further, they pressure would drop to 5bars and the sound of the motor would sound different (less rumble) with a squeaky noise. It seems like the maximum pressure i can go to is 8 bar. any slight adjustment and it would drop back to 5 bars.
Anyone out there with similar problems or solution? I guess i can live with 8 bars but it's just one of those things i need to solve if not i wouldnt be able to sleep peacefully =). Thanks guys/girls!
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