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Topic: Silvia pressure adjustment (9 msgs / 138 lines)
1) From: homeroast
Since my most recent Silvia rebuild my shots are pulling EXTREMELY 
fast.  I have Rocky dialled down to one click above zero (!!!), fines 
are getting through my PF, and a 15g shot pulls in 17-19 seconds.  I 
suspect I inadvertently "adjusted" the pressure, which is something I 
recall reading in my now-missing manual.
I do have an exploded diagram courtesy of the distributor but without 
documentation I can't figure out which nut I need to un-adjust.  I'm 
hoping someone on the list can point me at it...
Thanks!
PS - even fast shots of Puro Scuro at FC++ are tasty :D

2) From: homeroast
I only know the older non-adjustable version (which I have modded to
open at a lower pressure) but from seeing pictures of the newer
overpressure valve, it looks similar.
If you take off the top of your Silvia,  you will see a brass fitting
coming off the right side of the boiler, with a silicone hose running
back to the water tank.  There should be a nut close to where the hose
connects that you should be able to loosen a little to lower the back
pressure adjustment.
I used to easily be able to choke my Silvia, without the OPV opening
(before I modified it),  so I'm wondering about grinder uniformity
being the issue instead of the OPV.  Did you take apart your Rocky
around the same time??
--mike
On Jan 16, 2008 10:03 AM, Slinkster  wrote:
<Snip>

3) From: homeroast
At 09:03 AM 1/16/2008, Slinkster wrote:
<Snip>
Look closely at  your filter basket -- it might have cracked.  I 
haven't seen that problem with my Silvia, but I had it with an earlier machine.
Also, you mentioned "one click above zero" -- have you disassembled 
Rocky recently?  Your new zero might really be somewhere below the 
indicated zero.
--
Terry Stockdale -- Baton Rouge, LA
My computer tips site and newsletter: http://www.DrawingOnTheWeb.comMy computer blogs:http://www.PCRepairSite.Info, http://blog.TerrysComputerTips.com,http://www.XPRepairSite.comandhttp://www.VistaRepairSite.comMy personal site: http://www.TerryStockdale.com">http://www.TerrysComputerTips.comMy web design blog: http://www.DrawingOnTheWeb.comMy computer blogs:http://www.PCRepairSite.Info, http://blog.TerrysComputerTips.com,http://www.XPRepairSite.comandhttp://www.VistaRepairSite.comMy personal site: http://www.TerryStockdale.com

4) From: homeroast
Terry Stockdale wrote:
<Snip>
My basket appears to be fine - I haven't sent it out for an Xray or 
anything but on close visual inspection I don't see anything suspicious.
<Snip>
Yes, I did tear down Rocky and clean him out thoroughly at the same time 
I gave Silvia her heavy maintenance.  When I say "zero" I mean the 
setting at which the burrs touch *shudder*, not the point on the dial 
labelled zero.  I'm relatively certain the grind isn't the issue - I 
ground into a glass jar and took it to a friend's, tested my grounds on 
her Anita and Anita nearly choked.
So yeah, I'm back to that pressure adjustment thing...

5) From: homeroast
Mike Koenig wrote:
<Snip>
Ok, I'll have a poke around after Silvia cools down following my last 
shot of the day.  Worst case, I disconnect water in or out and that's 
easy enough to fix ;D
<Snip>
See my below response to Terry.

6) From: homeroast
What shape are your burrs in? If I remember right, they should be changed every 40#. Mine are due and I'm having some funky things happening.
Tim
---- Terry Stockdale  wrote: 
=============
At 09:03 AM 1/16/2008, Slinkster wrote:
<Snip>
Look closely at  your filter basket -- it might have cracked.  I 
haven't seen that problem with my Silvia, but I had it with an earlier machine.
Also, you mentioned "one click above zero" -- have you disassembled 
Rocky recently?  Your new zero might really be somewhere below the 
indicated zero.
--
Terry Stockdale -- Baton Rouge, LA
My computer tips site and newsletter: http://www.DrawingOnTheWeb.comMy computer blogs:http://www.PCRepairSite.Info, http://blog.TerrysComputerTips.com,http://www.XPRepairSite.comandhttp://www.VistaRepairSite.comMy personal site:  http://www.TerryStockdale.com">http://www.TerrysComputerTips.comMy web design blog: http://www.DrawingOnTheWeb.comMy computer blogs:http://www.PCRepairSite.Info, http://blog.TerrysComputerTips.com,http://www.XPRepairSite.comandhttp://www.VistaRepairSite.comMy personal site:  http://www.TerryStockdale.com

7) From: homeroast
Tim,
    Should that be 400# rather than 40#?
         pecan jim
On Jan 18, 2008, at 12:08 PM, Tim Harvey wrote:
<Snip>

8) From: homeroast
I would hope not! Every 40# seems pretty excessive.
Sheila
Tim Harvey wrote:
<Snip>

9) From: homeroast
Here's a link from HB:http://www.home-barista.com/forums/rocky-burr-wear-t211.htmlThey are recommending 75-100 lbs, and after looking at my roast log, that's about when I started noticing funk.
Tim
---- Jim Gundlach  wrote: 
=============
Tim,
    Should that be 400# rather than 40#?
         pecan jim
On Jan 18, 2008, at 12:08 PM, Tim Harvey wrote:
<Snip>


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