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Re:Gran Gaggia disassembly advice? - 2007/11/16 11:36 A short update: my Gran Gaggia recently returned to its previous persnickety behaviour. Before I made the trek out to Espressotec, I thought I’d try one last fix: remove the bolt in the centre of the grouphead (onto which the dispersion screen attaches) and go from there.

After a few turns with the socket wrench, I had the bolt out. It’s a spring loaded gizmo with a small rounded gasket at the tip which sits inside the group. I presume this mechanism regulates the water flow from the pump through the group.

I then ran several courses of water through the group, which resulted in a good deal of flaky scale in my pitcher. My unscientific diagnosis? The steaming action must force the scale against the little gasket, blocking the opening and not allowing any water to come through when I go to brew a shot of espresso.

I’ve had to complete this procedure two or three times now, with a little less scale coming through each time. Hopefully we’re soon at the end, and a diet of filtered water and regular descaling will prevent the problem from returning.

If nothing else, this little project has taught me a lot about the inner workings of my machine…
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Gran Gaggia disassembly advice?
Kevin R 2007/10/09 23:54
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colin 2007/10/10 19:24
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Kevin R 2007/10/12 16:33
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colin 2007/10/12 21:38
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Kevin R 2007/10/18 11:51
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Kevin R 2007/11/16 11:36
How is the current economic crisis effecting your coffee habits?
 
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