Re: Help! Silvia Leaking Grouphead Seal?
M5x12 C/S machine screw. I have a pile of them
PM me with your address and Ill send you a couple.
The OPV on the Silvia is nicely shown in the thread http://coffeesnobs.com.au/YaBB.pl?num=1326254123 The actual OPV is the screw in bit on the LHS of this. It is pretty cramped, but the mechanism is basically trivial - a spring and (if memory serves correctly) a brass plunger. If it is stuck, disassembly and cleaning might actually fix it. I did take mine apart when I set the pressure, but I cant remember a blind thing about how I did it. I suspect it is pretty straight forward since it doesnt stick in my mind.
Id be really surprised if it was stuck closed though. Adjusting involves measuring the pressure at the group head. You can make a gauge with a 3/8" BSP Tee screwed into the portafilter - one arm to a gauge and the other to a valve so you can let the 25ml/30secs flow through.. It is bulky and only just fits.
As a first cut - if you do disassemble the OPV - just count the number of turns and screw it back the same amount. Itll be close!
Geez - I hope you get this sorted soonish!
/Kevin
Originally posted by 332837253D20333B520 link=1327195828/13#13 date=1328007640
PM me with your address and Ill send you a couple. The OPV on the Silvia is nicely shown in the thread http://coffeesnobs.com.au/YaBB.pl?num=1326254123 The actual OPV is the screw in bit on the LHS of this. It is pretty cramped, but the mechanism is basically trivial - a spring and (if memory serves correctly) a brass plunger. If it is stuck, disassembly and cleaning might actually fix it. I did take mine apart when I set the pressure, but I cant remember a blind thing about how I did it. I suspect it is pretty straight forward since it doesnt stick in my mind.
Id be really surprised if it was stuck closed though. Adjusting involves measuring the pressure at the group head. You can make a gauge with a 3/8" BSP Tee screwed into the portafilter - one arm to a gauge and the other to a valve so you can let the 25ml/30secs flow through.. It is bulky and only just fits.
As a first cut - if you do disassemble the OPV - just count the number of turns and screw it back the same amount. Itll be close!
Geez - I hope you get this sorted soonish!
/Kevin

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