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This screws into the top of the group head, the main nut is 36mm and the machined flats can be seen on the valve body. Seperate these and the little Jet and screen is inside
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Can I just clarify where exactly this valve is located? I dont seem to recognise it (though, that might be because I have never stripped my technika apart)
Originally posted by bowser View PostSorted, thanks to the help of a forum member who steered me in the right direction, much appreciated.
found the jet in the top mushroom bit blocked up. I pulled this out yesterday but didn't strip it this far.
What it now looks like, water flow is so much better, 30ml in about 4 seconds
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Good info for ECM owners. I'm sure it's still easier than disassembling other parts of the machine, so it's handy to know what to look for.Originally posted by kofekitt View PostTrue, but with the ECM machines it can be a little less obvious how to get to it, they don't have the usual 22mm nut on top of the mushroom, instead you have to separate the two halves of the mushroom using the upper 36mm nut and the lower half which has 19mm flats machined into it
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True, but with the ECM machines it can be a little less obvious how to get to it, they don't have the usual 22mm nut on top of the mushroom, instead you have to separate the two halves of the mushroom using the upper 36mm nut and the lower half which has 19mm flats machined into itOriginally posted by LeroyC View PostThe mushroom valve should always be the first thing that gets checked if you suspect there's a blockage. If there's scale present this is where you'll see it most easily. If the group head is clean then your problem is elsewhere.
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The mushroom valve should always be the first thing that gets checked if you suspect there's a blockage. If there's scale present this is where you'll see it most easily. If the group head is clean then your problem is elsewhere.
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Originally posted by kofekitt View PostWooohooo , glad to be of service... :-) Hopefully you tried that option before my other suggestion ? (checking the water valve mesh filter) ?
yeah didn't bother with the other one after I found this. It was easier to get to. Thanks again
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Wooohooo , glad to be of service... :-) Hopefully you tried that option before my other suggestion ? (checking the water valve mesh filter) ?
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Sorted, thanks to the help of a forum member who steered me in the right direction, much appreciated.
found the jet in the top mushroom bit blocked up. I pulled this out yesterday but didn't strip it this far.

What it now looks like, water flow is so much better, 30ml in about 4 seconds
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I had a play with it in the shed today, took the back and sides off to get a closer look at the water circuit for potential blockages.
Removed the line to the pump and blew it out with compressed air, then the line from the pump to the solenoid, the the lines to each boiler, then the line to the steam wand, then the line to the group head, the fully disassembled the group head, cleaned it and greased it. Removed the screen and the little thing under it with the 2 small holes, blew them out also. I didn't do all the lines as I didn't want to remove the boilers so the lines from the bottom of the boilers didn't get cleaned.
Over all there was bugger all scale in any of the lines. I was really surprised how clean they were given the 12 months of daily use.
Not confident it was fixed (as I didn't really find anything concerning) I reassembled it and plumbed it back in and turned it one, still no pre infusion flow and 30ml in 16 seconds same as before.
I don't think it is a pump or motor issue as pump pressure is still getting up to 10 bar, slightly higher than what it normally does with coffee in the PF, it normally gets that high when the blind PF is fitted and doing a clean suggesting a blockage or partial blockage somewhere after the pump.
Before I box it up and send it to a someone to inspect i was thinking of doing a full system descale using the inbuilt tank to pump descale solution right through the pump, boilers and all lines. Is this a good idea?
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I've just had a similar issue with my Technika. I spoke to Renzo at Di Bartoli who went through a few simple checks, in the end advised to descale and popped a bottle of descaler in the post. Took less than 10 secs on the first descale flush to clear the blockage. I hope your issue clears up just as easily.
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that was plumbed in flow rate.
Anyone know how the water flows through the machine? I'm thinking I have a blockage somewhere given the pre infusion no longer works and that doesn't use the pump
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Is that running off the tank? On my machine (plumbed) I get 30ml in about six seconds, with an empty basket in a naked pf.Originally posted by bowser View PostIf anyone has one of these machines, can you measure your flow for me? mine takes 16 seconds to flow 30ml with an empty PF
E-61 stripdown is pretty straightforward, so you could check for anything obviously restricting the flow there and change the seals while you're at it.
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+1 for Di Bartoli. Great people, great service. Whenever I visit that business, I always leave happy, knowing that the return trip from Maitland (4+ hrs) was well worth it
Cheers
Mal
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Di Bartoli are also in Sydney and are another option for providing excellent professional service...
Espresso machine service centre
Mal.
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Do you have one in stock you could do a simple flow test on for 30ml Paul?
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