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6910, newish problem, leaky group handle

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  • andrewmills
    replied
    Re: 6910, newish problem, leaky group handle

    Hi Divad
    Have a couple of shots, of the No1 and No2 screens. But its pretty straight forward.
    1. Screw in No12 Nut. "Clinch , dont over tighten" Photo1
    2. Place No 1 Screen on blue group seal. Photo2
    3. Place No 2 screen over top No1 screen. Photo3
    4. Insert group seal into group housing and screw in Phillips screw.
    Voila

    Cheers Andrew

    Leave a comment:


  • divad
    replied
    Re: 6910, newish problem, leaky group handle

    Techo, do you have any pics of the assembly order of the showerhead, blue seal etc. What is the order?

    Leave a comment:


  • dumiya
    replied
    Re: 6910, newish problem, leaky group handle

    Thank you for the hole correction:   It indicates that the problem may be as below:

    I notice that when I fill the PF sometimes the grinds do not spread evenly and when I tamp it looks good - however recently had a similar problems as originally mentioned in the post.

    I pushed my finger down around the edge of the basket to check the tamp and found in some places the grinds were not tamped evenly.  If this happens the brew water finds the easiest way out and the brew is flawed.  

    (hat still in the ring)
    dumiya

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  • foul-up
    replied
    Re: 6910, newish problem, leaky group handle

    the water enters through the middle of the bolt and sprays out onto the top filter through the holes shown

    [img][/img]

    the soft spot you have mention at the rear of the cake may be under the hole at back left in the allo housing, under the showers. this is the exhaust port going to the 3 way. this is where the pressure is releasd from the pf

    graham

    Leave a comment:


  • dumiya
    replied
    Re: 6910, newish problem, leaky group handle

    Hi
    I speak hastily and out of turn- I do not have a EM69xx but I noticed from a picture (on page 2) of the underneath of the group what I think is the hole that brewing water enters.  It appears to be at the back.
    It crossed my mind that a small ss plate could act a a spreader behind the filter in front of the hole(s).
    This would spread the incoming water over the boiler side of the screen.  Then up dosing and wearing of the collar may not be necessary.
    If the idea is theoretically okay it may be necessary to made the plate wavy (corrugated) so it let the brewing water flow over it easily.

    hat in the ring
    dumiya


    Leave a comment:


  • marcstolk
    replied
    Re: 6910, newish problem, leaky group handle

    Techo is correct - Mine is the same...

    And for the record Wushoes, I flush all the time - a generous one at that, but unless I seriously updose, the shot will blonde early and I find this really frustrating...

    So I investigate and pull the Naked PF out - using a firm tamp using a pullman, carefully distributing.

    Step 1: Normal dosing - I find that pour always starts at the back of the basket (handle end) first, so it blondes before the rest of the basket starts to release the espresso. I end the extraction, pull out the PF and look at the puck - perfectly flat, no holes until I notice at the back of the basket I see a slight indent (not a hole) so I press at it and is indeed slightly softer than the rest of the puck.

    Step 2 : Updosing, courser grind, tighter to fit in the group - pull the shot... picture perfect. A solid colour from start to finish. The puck at the end was hard - all the surface. This, via updosing will wear out the Group Collar which is what Im experiencing now.

    I suspect for some reason the Sunbeam hits the rear of the puck harder than the other areas.. What Id like to know is, is this a normal thing with most machines or is it a EM6910 specific?

    Cheers,
    Marc

    Leave a comment:


  • foul-up
    replied
    Re: 6910, newish problem, leaky group handle

    hi techo
    maybe they have changed the shower configuration to make it easier for the customer to replace the seal and clean the filters.
    have been seeing a few myself of late and am awaiting answer from sunbeam

    graham

    Leave a comment:


  • Wushoes
    replied
    Re: 6910, newish problem, leaky group handle

    Thats why its wise to flush before and after you make an epsresso....regardless of what machine you use. It is good practice...not only will it solve your problem, it will spit all the gunk from your last espresso off the shower screen in to your drip tray.

    Leave a comment:


  • andrewmills
    replied
    Re: 6910, newish problem, leaky group handle

    Hi Folks
    My 1st post but have garnered some great information from you all thanks. I think there must be a different assemble of the present generation of 6910s. Mine (4 weeks old) has both screens fitted to the blue group seal both held into the group head by the phillips screw. There is no way the No2 screen could be held in by the No12 nut. As you can see from  photo 1 the  ridge that would hold the screen in place is well recessed and would never get to screw in with the screen acting as an enormous washer .
    [img][/img]
    Having said that I have wondered why the 2 screens are so close together, thought it must be to protect grinds getting up in to the drip prevent valve and to give better water dispersion.
    But youd think putting that much heat sink into the water path is going to be a real disadvantage when it comes to getting water temperature stability. Brew water temp: seems to be one of the struggles for the machine. I put a thermo probe in between the cleaning disk and an empty 2 cup basket. While idle, with the temperature set to +4, I measured 192.4F. As soon as the brew pump is activated the temp rockets ,down 5 seconds, to 160F. Now I know holding up the flow with coffee is going to slow down the temperatur drop but I suspect the volume of 192F water is quite short. Thats why the draw blonds so early for what is a large dose of coffee.Thats also why the single cup is such a better balanced drink. I dont suppose anyone knows what volume of water the thermoblock holds ?
    Still love the machine and its potential. Would love to have a bit more range in the brew temp though.
    Cheers Andrew

    Leave a comment:


  • foul-up
    replied
    Re: 6910, newish problem, leaky group handle

    if you pull the showers out you should find the nut screwed into the bottom of the boiler, the lower shower screw threds into this nut

    some units have been reaasembled incorrectly
    graham

    Leave a comment:


  • marcstolk
    replied
    Re: 6910, newish problem, leaky group handle

    Thats funny, mine is the same as m@ ...

    Something doesnt add up there.

    Leave a comment:


  • foul-up
    replied
    Re: 6910, newish problem, leaky group handle

    Interesting - my machine is different to the one in Sunbeams instructions; no locking nut on the second screen. Once Ive undone the screw, both screens and the (blue) seal come away easily.
    the boiler assembly hasnt changed, the instructions are the same for both models

    possibly someone has put it back together wrong

    graham

    Leave a comment:


  • Remy
    replied
    Re: 6910, newish problem, leaky group handle

    Originally posted by Thundergod link=1207018893/15#16 date=1207545377
    When you eventually do need to change the seal this is wahat Sunbeam sent me.
    Thanks heaps TG,.. I have printed it and put it in my manual. I also wrote on the printout what Graham and Mats comments were. Too easy thanks!!!

    Leave a comment:


  • marcstolk
    replied
    Re: 6910, newish problem, leaky group handle

    Thats because the instructions are for the EM6900 - a bit different on the Em6910

    Leave a comment:


  • Magic_Matt
    replied
    Re: 6910, newish problem, leaky group handle

    Originally posted by Thundergod link=1207018893/15#16 date=1207545377
    When you eventually do need to change the seal this is wahat Sunbeam sent me.
    Interesting - my machine is different to the one in Sunbeams instructions; no locking nut on the second screen. Once Ive undone the screw, both screens and the (blue) seal come away easily.

    Leave a comment:

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