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My e61 group head on my Diadema UNICO Splendor exhaust port probs

My e61 group head on my Diadema UNICO Splendor 1group lever machine is not working properly. THe shot comes out ok but when you shut the lever off to finish shot, the excess water and pressure does not come out the bottom exhaust port like it should, the pressure comes out of the group head when i undo the group handle, thus spurt coffee grounds and more importantly hot water all over my hands and space. Please help. I have changed valve assembly's rubbers etc...dont know whats going on..

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  • marc724720 Jul 25, 2009

    Thanks so much for your help es, i will take the exhaust port apart again and see. All though i have redone this 2 times already and followed the instructions/pictures from the www.coffeeparts.com.au site on faema e61 group heads. The other thing i forgot to mention is that whilts the shot is in process and all thougth the shot comes out slow, the exhaust port does drip some water as the shot is flowing, it drips like a fast tap. So maybe i have done it wrong indeed. The 3 gaskets you talk about, what colour are they?? The rubbet ones brown? or the white plastic like ones.??
    Thanks again for your help ES. Most appreciated.
    Marcello - Australia
    marc724@bigpond.com

  • marc724720 Jul 27, 2009

    Hi again es, my machine head is an e61, if you have the time look at the pictures of it on this site.
    http://www.mokaflor.it/lang_ENG/unico_sp...

    that way you get a better idea of what i have.
    And it is a pump assisted lever and not a full old style lever.
    Hope this helps, as i took it apart again on the weekend and changed around some things, but still it seems to be blocked or water pressure coming out the group head....driving me nuts, i thought i had it.

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  • Master
  • 1,618 Answers

There might be one of 2 things going on,
1- the exhaust tube is blocked.
2- one of the three gaskets in the group is on backwards.

Posted on Jul 25, 2009

  • Ernest R
    Ernest R Jul 27, 2009

    O.k the second part of the advice I gave you was for the long lever model machine. The head on your machine is the same as the San Marco levers.
    Is the machine a full lever or a pump assisted lever?


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