file Leaking Gaggia

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13 years 3 months ago #1418 by John Mitchell
Leaking Gaggia was created by John Mitchell
I have had my Coffee Gaggia for a year and it has recently started to leak. I took it bak tot eh vendor and they said it needed to be cleaned. After paying $40, I took it back home and it was still leaking! I have taken of the mesh cover and the block with hex keys. I can see the gaskets but the water appears to be coming from the bolt in the middle. Any ideas on the next step? Any suggestions on where to buy gaskets in Montreal?

Thanks
John

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13 years 3 months ago #1419 by colin
Replied by colin on topic Leaking Gaggia
It needed a bit more than a cleaning I think...

So - you say that it is leaking or leaping
ABOVE the shower screen at the nut?

Does it worsen when you switch into STEAM
mode? (not opening the wand or anything...)

More specifically -- when you press the steam
switch and start waiting for the unit to
heat up, does water run out this area MORE or
LESS?

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13 years 3 months ago #1420 by John Mitchell
Replied by John Mitchell on topic Leaking Gaggia
Hi Colin,

The machine does leak more when I am in steam mode. I have tried it with the creen off and I can see water (and steam) bubbling out around the nut bove the shower screen. You seem to know what is wrong. Hope it is easy to fix.

JOhn

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13 years 3 months ago #1421 by Zazenmaster
Replied by Zazenmaster on topic Leaking Gaggia
Hi John;

If you're saying that it's dripping while you're not actually brewing, then I don't think replacing the group head gasker will help. Perhaps the return hose that routes overflow back to the tank is blocked.

I'm used to the Topazio where you have to physically remove the two hoses to refill the tank. Not sure about the arrangement on the Coffee, but I'd suggest you look for either the shorter of two hoses or perhaps an opening near the top of the tank and make sure it's not blocked.

Robb

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13 years 3 months ago #1422 by colin
Replied by colin on topic Leaking Gaggia
What is happening here (I think...) is:

Under this nut is yet-another-screw that holds a spring that has a little rubber "pea" or "mushroom" stopper attached to it.

The mushroom thing kinda presses down on the boiler exit into the shower-screen and portafilter so that when the machine is idle (or in steam mode), water is kept from bubbling out of the unit into the portafilter until the brew switch is pressed.

The thing is, with the boiler containing hot water, there is steam and (resulting)bar pressure (without the pump running...) anywhere from 1.X bar to 3 Bar or higher.

If you were to pull the hose off the input of the boiler with this "live steam pressure", you would be in for an unpleasant surprise.

So - this "pea" or "Mushroom" stopper acts as a valve (spring loaded) that keeps the steam and water in the boiler during idle moments.

When you press "Brew", the boiler kicks in and the Bar press in the boiler quickly ramps up to 9 to 12 BAR.
Somewhere between 6 and 9 Bar, the pressure pushes this "Rubber cap" down do the brew water can get into the portafilter.

Can you know see what would happen if this mechanism got clogged by sediment from a gunked up boiler... or if it became caked with lime scale...
like a stopper in your bath-tub that could not hold the bath water in...

so to speak..

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13 years 3 months ago #1423 by Zazenmaster
Replied by Zazenmaster on topic Leaking Gaggia
Here's some photos of the dissembly process thoughtfully uploaded by a fellow with a similar problem:

http://owenegan.com/pix/espresso/gaggia_espresso/index.htm

Robb

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