ck72 Senior Member Joined: 15 Jun 2004 Posts: 79 Location: Melbourne, Australia Expertise: I live coffee
Espresso: San Marino CKX Grinder: Rocky Doserless
Posted Thu Jan 27, 2005, 2:05pm Subject: low discharge of water at the group
Hello follow CGs, I am seeking your opinios about something that happened to my machine a few days ago, I have a San Marino CKX machine aka Astoria CKX in the US as shown below. When I pulled a shot it took a very long time to extract and when it did so there was very little substance to it (very little crema and the consitancy did not look all that flash), I thought that the grind may have been too tight so I ground coaser with my rocky and once again a similar result. I then pulled a blank shot only to notice that the speed with which the water was being discharged was very slow. I tried backflushing and still no change, I have also noticed that the speed with which water was being discharged through the hot water outlet was also very slow. This led me to power up my old baby Gaggia, when pulling a shot at the last setting the rocky was on water just flushed through the PF so I tightened the grind and got an almost perfect result almost 50% crema, I tried again on my HX machine it felt like it took forever to pull a shot at the revised setting. I ran blank shots from both machines at the same time and the gaggia ran twice the amount of water that my HX machine ran. I have sent the unit away for repair but in the mean time these are the conclusions I have come up with and please let me know if you think I may be going off on a tangent. Oh one more thing recently I have been hearing a hissing noise that seems to have been coming out of the boiler and the pump started working more often than what it did when I first bought it.
-It seems as though the pressure at the group has reduced significantly (I have not measured this as I do not have a pressure gauge to measure extraction pressure).
-The Vibe Pump is on its way out?
-The internal filtration system may be clogged up (the machine is only 6 months old)
-could it be an o-ring that may be leaking ( there is no sign of significant water discharge in the drip tray or under the machine)
I am hoping to get my machine back in a weeks time and will post an update in the mean time I look forward to your contributions.
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