HomeRoast Digest


Topic: Silvia maintenance - done (9 msgs / 186 lines)
1) From: Slinkster
After many months of trying to get some basic routine maintenance parts 
through my local espresso machine repair shop (co-located with hte store 
that sold me Silvia in the first place) I finally gave up and ordered 
from that place in OlympiaWA.  Today I pulled the machine apart, 
replaced various bits (steam valve seat, good bye drippy steam wand) 
most notably, plus some O-rings and the group gasket.
The truth will be in the shot - waiting impatiently for the machine to 
reach working temp - but I'm hopeful that the extra-thorough cleaning I 
gave the group, plus the heavy descaling and general refurbishment will 
let me produce better shots than I have been of late.

2) From: miKe mcKoffee
Hopefully thorough cleaning included your grinder, complete PF too of
course. Highly suggest you now embark on a regular "routine maintenance"
regimen that'll keep shots pulling true.
1) When doing a series of shots flush group and rinse PF with off boil water
after each shot. Be sure to dry PF basket before filling for next shot.
2) At the end of every shot session water flush then do a couple water back
flushes. Even is the session was only one shot. Oils will sit and go rancid
in short time even from one shot.
3) If even one shot pulled daily approx' weekly detergent backflush. If
heavy use day like a couple dozen or more shots detergent backflush end of
day regardless the schedule. (Like after entertaining) Weekly good schedule
for through the grinder Minute Rice or Grindz etc. At the minimum weekly
soak and scrubby PF and basket. 
4) Monthly after detergent backflush remove group screen and make sure it's
completely gunk free on the back side.
5) Know your water hardness. My schedule with moderately hard water is
preventative citric acid descaling every 6 months. Time for grinder tear
down cleaning too! Need something to do while citric acid sitting doing it's
job and espresso machine out of production anyway:-)
6) Annually if on 12hrs or so a day replace group gasket, or every two years
if on less often. If you're getting leaking around the top of the PF during
a shot it's way past time and likely will have fun chiseling a rock hard
carbonized gasket out:-0
The time for espresso machine maintenance isn't when your shots start
tasting gross, that's way past time. There is no excuse for dirty coffee
gear!
Kona Konnaisseur miKe mcKoffeehttp://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must">http://www.mcKonaKoffee.comURL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must
first not know. And in knowing know I know not. Each Personal enlightenment
found exploring the many divergent foot steps of Those who have gone before.
Sweet Maria's List - Searchable Archiveshttp://themeyers.org/HomeRoast/
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3) From: Barry Luterman
He sounds like my mother and like my mother he is right.
On Dec 17, 2007 4:17 PM, miKe mcKoffee  wrote:
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4) From: Slinkster
Thanks Mike.  I do all these things regularly but no amount of cleaning 
and descaling keeps gaskets and o-rings and valve seats soft or 
counteracts my hard++ water.

5) From: Slinkster
SHould have said "no amount of "regular weekly"..."
Gotta pull the old girl apart once in a while and get after that 
limescale with the hammer and chisel no matter what I do.
Slinkster wrote:
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6) From: miKe mcKoffee
Just curious, prior to breaking out the hammer and chisel had you been doing
regular citric acid preventative descaling every couple of months? If yes
definitely sounds like you have water quality issues and filtering softening
is in order.
Seals be affected by heat is of course a different issue and to be expected
over time.
Kona Kurmudgeon miKe mcKoffee
www.mcKonaKoffee.com
URL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must
first not know. And in knowing know I know not. Each Personal enlightenment
found exploring the many divergent foot steps of Those who have gone before.
Sweet Maria's List - Searchable Archiveshttp://themeyers.org/HomeRoast/
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7) From: Slinkster
miKe mcKoffee wrote:
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I run citric acid solution through the machine every couple of WEEKS, 
not every couple of months.  Steam and pressure were getting unreliable 
so I pulled the boiler apart - there was a good 1/4" of scale build up 
in there despite the regular descaling.  I've had the machine for a bit 
more than 3 years, have had to use the 9% vinegar and brass brush on the 
boiler twice now, both times I replaced all the rubbery bits since i had 
the machine torn apart.  I could almost be persuaded she's a new machine...
And yes, our water sucks.  I've asked Santa for an RO unit for the 
kitchen this year.

8) From: miKe mcKoffee
Wow and ouch. Further just curious. When you ran "citric acid solution
through the machine" every couple of weeks each time did you let the
solution sit in the hot boiler for a few hours before flushing?
Regardless, at least you know Silvia's inner workings pretty well by now!
Kona Konnaisseur miKe mcKoffeehttp://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must">http://www.mcKonaKoffee.comURL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must
first not know. And in knowing know I know not. Each Personal enlightenment
found exploring the many divergent foot steps of Those who have gone before.
Sweet Maria's List - Searchable Archiveshttp://themeyers.org/HomeRoast/
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9) From: Slinkster
miKe mcKoffee wrote:
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Very much.  At least I don't need to worry about getting my daily 
minimum dairy - as long as I drink plenty of water I'm getting plenty of 
minerals and calcium :P  Other than being horribly hard our water is 
great - it tastes good, never fishy or "green".  In the summer it comes 
lukewarm from the tap, but that's Central Texas ground heating the muni 
supply lines, and no fault of the water itself.
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Of course.  I usually pull three doubles over the course of a morning.  
Every couple of weeks I make up citric acid solution (2T per quart), run 
it in, and run the pump occasionally to keep things moving in there.  
Fresh water flush and done.
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Well, yes and no.  I know what parts I need to order, but with an 
18-month mainenance cycle I don't see myself getting any faster at the 
work.  Familiar with her I am, competent enough to strip and rebuild her 
in less than 4 hours I am not :D


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