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Re: Miss Silvia Problem

"Brewer Bob" < wrote in message
>A buddy of mine has a stock(no pid) Rancillio Silvia and is having the
>following problem:
>
> Power to the machine is good
> Water temps are correct ~200-203F
> He can here the vibe pump when he hits the brew button
> There is water coming out with an empty PF(no coffee)
> When he locks and loads the PF with espresso there doesn't appear to be
> enough pressure to extract the coffee.
> He is an experienced home Barista for 3 or 4 years so, I rule out operator
> error.
>
> Any Ideas?

If the pump is ok, what do alt.c Silvia owners think of the portafilter
pressure guage mentioned in this article http://preview.tinyurl.com/3mg8db
Is it worth spending $30 to get one? Useful for setting the brew at say 9.5
bar?

Whilst on the subject of OP valves, would a piece of grit or scale, stuck in
the PO valve spring, cause the valve to stick open?

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