Linea help/diagnosis

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Linea help/diagnosis

Postby James Hoffmann on Mon Mar 27, 2006 1:51 am

I am having trouble with the Linea I am using for competition practise.

I can't get the texture in the pour I need. I've run the coffee side by side through other machines and got the results I want. It is not temperature, and the pours are extracting evenly enough.

It just seems a little water as it pours. Part of me thinks it might be a pump problem, but the gauge on this machine just seems to show 9bars regardless of whether it is on or off, with a little twitch when you engage the pump.

I am pretty sure it isn't the water (other machines are using the same water source).

Have I missed something obvious?
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Postby jepy on Mon Mar 27, 2006 8:06 am

Does this machine use a small gicleur? I 've changed these on my machine for that reason.

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Postby James Hoffmann on Mon Mar 27, 2006 9:50 am

Yeah, but it had the 0.8mm ones installed recently and this problem was there before.
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Postby barry on Mon Mar 27, 2006 9:53 am

make sure the basket isn't cracked, and make sure the group gasket is sealing with the portafilter properly. i've seen watery pours from both of these situations, and sometimes the condition was non-obvious (eg, very small trickle of water running down back side of pf and underside of spout, merging with the espresso stream).
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Postby James Hoffmann on Mon Mar 27, 2006 10:27 am

New gaskets were put in with the gicleurs.

I've tried about 5 different baskets in there in a moment of pure desperation.

How accurate are Linea brew pressure gauges?
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Postby barry on Mon Mar 27, 2006 10:41 am

James Hoffmann wrote:How accurate are Linea brew pressure gauges?


about as accurate as any other espresso machine gauge.


are you sure it's not a temp issue (too cool)?
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Postby jepy on Mon Mar 27, 2006 11:24 am

How many groups is this machine? If multiple, are they all the same? If it's a single, maybe some scale or something is lodged in one of the feed tubes.
One time I had water filter starving the pump of enough flow, although you probably could hear that.

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Postby malachi on Mon Mar 27, 2006 11:36 am

Sounds like scale or a similar restriction to me.
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Postby Klaus on Mon Mar 27, 2006 11:41 am

Make sure you get a separate portafilter-gauge to measure the brew pressure. I've heard from our technician that the build-in gauge often isn't accurate. How high does the pressure go, when the heating element on the brew boiler is on? Is the over-pressure valve maybe set way too low? I'm just guessing here...
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