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EM6910 Sidecover removal

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  • Rusty
    replied
    Re: EM6910 Sidecover removal


    Originally posted by 5D6D7A68727E711F0 link=1254111162/12#12 date=1254365433
    facts dont have to be presented in a drab manner (that can be left to accountants
    Not the good ones.... we can make "youre business is heading down the gurgler" sound like a real attention getter

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  • A_M
    replied
    Re: EM6910 Sidecover removal

    Originally posted by 6C5C4B59434F402E0 link=1254111162/36#36 date=1254697630
    Originally posted by 3F332026203B2A520 link=1254111162/34#34 date=1254659804
    are you gettingany coffee through when you try and pull a shot as normal?  
    Originally posted by 133C3537201F333C3335373F373C26520 link=1254111162/35#35 date=1254662753
    And what happens if you try for HOT Water...If that little spring valve in the head is playing up you will have all sorts of issues.  
    Everything is working as normal except for the pressure relief in the head when you cut the brew cycle. This is ok if I get it right as the liquid can still trickle out the group handle but if I overdose or grind too fine it all stays under pressure with the resulting spurt of grinds everywhere when the handle is released. Also makes inspection of the puck difficult. Im still making coffee however and when I get it right it is as good as ever. The gauge is registering no pressure but it does work (used martrix air trick to check it) so it all points to a blockage in that line b/w C and B.

    Im fairly certain the blockage is in/near C just where the tunnel does the right angle turn to the rear of the head.

    The spring/non-return valve in the centre (A) was removed and cleaned. It appeared to have no problems.

    The fact that I can still make coffee has me tossing up whether I should live with it as it is :-/ However now that I know its not meant to be like that itll play tricks with my head

    ROFLMAO...  So true.... Many a time I have persisted and ended up mush worse off and then questioned my intent  ;D

    However, in this case, it is about getting a dry puck and allowing excess pressure to be safely managed...  Thus I would persist from a WHS point...  

    As to teh gauge working... That is a side issue  

    UPDATE: With teh system OFF - Using my small compressor; air was input at C and the gauge moved slightly, with the excess coming out the drain..

    Thus I can only assume that there is a blockage in the head and or tubing from the take off for the gauge to the head...

    CLEAN and SUCK and BLOW - Do this for the actual components ONLY... Other wise you could move the offending crap into another section and cause further issues...


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  • Brewman
    replied
    Re: EM6910 Sidecover removal

    Originally posted by 3F332026203B2A520 link=1254111162/34#34 date=1254659804
    are you gettingany coffee through when you try and pull a shot as normal?
    Originally posted by 133C3537201F333C3335373F373C26520 link=1254111162/35#35 date=1254662753
    And what happens if you try for HOT Water...If that little spring valve in the head is playing up you will have all sorts of issues.
    Everything is working as normal except for the pressure relief in the head when you cut the brew cycle. This is ok if I get it right as the liquid can still trickle out the group handle but if I overdose or grind too fine it all stays under pressure with the resulting spurt of grinds everywhere when the handle is released. Also makes inspection of the puck difficult. Im still making coffee however and when I get it right it is as good as ever. The gauge is registering no pressure but it does work (used martrix air trick to check it) so it all points to a blockage in that line b/w C and B.

    Im fairly certain the blockage is in/near C just where the tunnel does the right angle turn to the rear of the head.

    The spring/non-return valve in the centre (A) was removed and cleaned. It appeared to have no problems.

    The fact that I can still make coffee has me tossing up whether I should live with it as it is :-/ However now that I know its not meant to be like that itll play tricks with my head

    Leave a comment:


  • A_M
    replied
    Re: EM6910 Sidecover removal

    Originally posted by 3B372422243F2E560 link=1254111162/34#34 date=1254659804
    are you getting  any coffee through when you try and pull a shot as normal?
    And what happens if you try for HOT Water... If that little spring valve in the head is playing up you will have all sorts of issues.

    Leave a comment:


  • martrix
    replied
    Re: EM6910 Sidecover removal

    are you getting any coffee through when you try and pull a shot as normal?

    Leave a comment:


  • Brewman
    replied
    Re: EM6910 Sidecover removal

    [QUOTE=58777E7C6B547877787E7C747C776D190 link=1254111162/32#32 date=1254648251]
    Originally posted by 6A5A4D5F454946280 link=1254111162/31#31 date=1254643225
    So what is the ACTUAL problem that you believe, your having...  
    There is a blockage in the head in the line b/w C on the diagram above and the rear of the head. I disconected and cleaned all the copper lines b/w rear of the head and the 3-way. I can blow air through them but not from rear of head through to C.


    Two symptoms: no reading on pressure guage & pressure not released after in head after brew is stopped.
    I cant blow air from B through to C

    Pic again to make it easier

    ps you cant see it from this pic but copper line runs left-to-right out from the 3-way/soleniod straight to the back of the head.

    I am correct in thinking that when the brew cycle is stopped that the solenoid should open allowing the pressurised liquid in the head to run out through C, past B, through solenoid valve then into the drip tray?

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  • A_M
    replied
    Re: EM6910 Sidecover removal

    Originally posted by 6A5A4D5F454946280 link=1254111162/31#31 date=1254643225
    I have access to an ultrasonic which is why I threw it into consideration. What are the pitfalls I should consider before deciding whether to attempt it?
    For one ya need to know what your cleaning.. Sounds silly, but nothing worse that putting in ONE item and then finding springs and little balls etc.. Opps how does this all fit back together

    The rubber blind... Just blocks for a moment and as your cleaning tab dissolves, it also releases some of teh pressure and cleaning fluid flow through the group... When checking ya Gauge... Either the Rubber a OR double floor used... Then in manual after a min or so teh gauge will reach a value... That is the SB sweet spot... Do a search as there is plent to read up on...


    So what is the ACTUAL problem that you believe, your having...

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  • Brewman
    replied
    Re: EM6910 Sidecover removal

    Originally posted by 527D7476615E727D7274767E767D67130 link=1254111162/29#29 date=1254626784
    The rubber blind is usually inside and attached to the rear door...  Or you can use the double floor baskets as it does the same thing..

    A solid Blind is a NO NO on these units...
    Now I feel like a real goose. The rubber thing never seemed to work. Im gueesing I was using it incorectly :-[

    Originally posted by 527D7476615E727D7274767E767D67130 link=1254111162/29#29 date=1254626784
    I would be cleaning and flushing all the lines prior to replacing teh head... That could be more than the unit might be worth..
    All the lines bar the galley through the head are flushed. I was surprise at the lack of scale but thats not siurprising hink9ng on it now, its hardly had any water through them if my guess is right.

    Originally posted by 527D7476615E727D7274767E767D67130 link=1254111162/29#29 date=1254626784
    I do use an ultra sonic but one needs to take some care with some items and the removal and refitting is where YOU / ME introduce a fault and they are the worse kind.
    I have access to an ultrasonic which is why I threw it into consideration. What are the pitfalls I should consider before deciding whether to attempt it?


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  • martrix
    replied
    Re: EM6910 Sidecover removal

    watch this vid. At the 38sec mark is the "pshht!" which is the relief valve letting go of the built-up pressure in the head and exiting it to the drip tray below. You can see it happen if you remove the stainless tray.

    Does this happen to yours?

    [media]http://www.youtube.com/watch?v=vfdkJoZkwqU&feature=player_embedded[/media]

    Leave a comment:


  • A_M
    replied
    Re: EM6910 Sidecover removal

    Originally posted by 4777607268646B050 link=1254111162/28#28 date=1254626141
    Originally posted by 2B273432342F3E460 link=1254111162/25#25 date=1254620235
    Did you completely remove and disassemble the solenoid valve to clean it?
    Yes, thanks to your thread its spiffy clean inside now
    Originally posted by 07282123340B27282721232B232832460 link=1254111162/26#26 date=1254623748
    The SB blind has a hole in it for good reasons... If you left a normal blind in it... Naughty....

    Rather that forcing any crap further into the system... The trick is to work in the reverse ...IE.Suck via a vacuum system or apply pressure from the other end..

    However all pathways need to be manually open as you dont want to do this when the system is ON..

    Matrix took some time and will confirm that at the end of teh day.. It is rather straight forward, but you have to take ya time and no SHORT CUTS...No matter how good they might sound..
    Obviously I am naughty, the crap will be well and truly forced in now :-[ Ive only had a blind filter for a few days, the machine didnt come with any - unless you mean the dual floor baskets :-/

    Would some time with the head in an ultrasonic bath be worth a shot? The other thought I had was contact cleaner :-/ You can squirt that down the orifice with the tube applicator.
    I have a compressor so Ill take the blow from the back option but I reckon its (the blockage) been there for two years and has had plenty of time to bake itself in. It wont be easy is my guess. Maybe the new head option would be worth it for the saving in time/aggravation

    The guage is working which is why I reckon the blockage has been there since the dial stopped moving. Ill remove the head and go from there.
    The rubber blind is usually inside and attached to the rear door... Or you can use the double floor baskets as it does the same thing..

    A solid Blind is a NO NO on these units...

    I would be cleaning and flushing all the lines prior to replacing teh head... That could be more than the unit might be worth..

    I do use an ultra sonic but one needs to take some care with some items and the removal and refitting is where YOU / ME introduce a fault and they are the worse kind.

    Of to Ballet so will check back in a couple of HRs..

    AM

    PS. Matrix... How is yours going and your Group Handle ?

    Leave a comment:


  • Brewman
    replied
    Re: EM6910 Sidecover removal

    Originally posted by 2B273432342F3E460 link=1254111162/25#25 date=1254620235
    Did you completely remove and disassemble the solenoid valve to clean it?
    Yes, thanks to your thread its spiffy clean inside now
    Originally posted by 07282123340B27282721232B232832460 link=1254111162/26#26 date=1254623748
    The SB blind has a hole in it for good reasons... If you left a normal blind in it... Naughty....

    Rather that forcing any crap further into the system... The trick is to work in the reverse ...IE.Suck via a vacuum system or apply pressure from the other end..

    However all pathways need to be manually open as you dont want to do this when the system is ON..

    Matrix took some time and will confirm that at the end of teh day.. It is rather straight forward, but you have to take ya time and no SHORT CUTS...No matter how good they might sound..
    Obviously I am naughty, the crap will be well and truly forced in now :-[ Ive only had a blind filter for a few days, the machine didnt come with any - unless you mean the dual floor baskets :-/

    Would some time with the head in an ultrasonic bath be worth a shot? The other thought I had was contact cleaner :-/ You can squirt that down the orifice with the tube applicator.
    I have a compressor so Ill take the blow from the back option but I reckon its (the blockage) been there for two years and has had plenty of time to bake itself in. It wont be easy is my guess. Maybe the new head option would be worth it for the saving in time/aggravation

    The guage is working which is why I reckon the blockage has been there since the dial stopped moving. Ill remove the head and go from there.

    Leave a comment:


  • martrix
    replied
    Re: EM6910 Sidecover removal

    Bman, I would suggest first you disconnect you pressure gauge line (at B in pic above) and then blow compressed air through it to see if anything registers on the gauge.
    Be super gentle with this copper line as it is hollow and will only take a few bending sessions before it will develop a crack.


    If that checks out with no major leaks then I would be removing the solenoid valve and clean it as per my post. Make sure all the little rubber items are moving correctly, study the little bugger and soak, clean, soak clean in Cafetto.


    http://coffeesnobs.com.au/YaBB.pl?num=1249003655/64#64

    Leave a comment:


  • A_M
    replied
    Re: EM6910 Sidecover removal

    Originally posted by 6A5A4D5F454946280 link=1254111162/24#24 date=1254618028
    Im now convinced that the two are related. The first option was to leave the blind filter under pressure overnight with the machine in standby mode in the hope that the cafetto and pressure would release the blockage. All this achieved was to deform the blind filter
    The SB blind has a hole in it for good reasons... If you left a normal blind in it... Naughty....

    Rather that forcing any crap further into the system... The trick is to work in the reverse ... IE. Suck via a vacuum system or apply pressure from the other end..

    However all pathways need to be manually open as you dont want to do this when the system is ON..

    Matrix took some time and will confirm that at the end of teh day.. It is rather straight forward, but you have to take ya time and no SHORT CUTS... No matter how good they might sound..

    At the end of the day.. Matrix / Myself could assist but or time and getting it to us is teh issue...

    Keep working on it... But slow and steady... Also do not break the fine tubing to the Gauge...

    I have done about 8 major repairs and all have been basic problems, often due to misuse or lack of cleaning (Correct cleaning that is). I still try to short cut and get caught every time...



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  • martrix
    replied
    Re: EM6910 Sidecover removal

    Did you completely remove and disassemble the solenoid valve to clean it?















    Leave a comment:


  • Brewman
    replied
    Re: EM6910 Sidecover removal

    Ok sidecover off and fitting nipped up (it wa sthe one at the bottom od the copper tube that feeds the steam thermoblock) Thanks agian AM. Martrix will be served one of my best beers when we meet ;D

    The story now continues -
    I went to Jetblack for one of their home barista courses last week (excellent course from Deb and Charlie who know all the ins and outs of the various domestic machines. I can highly recommend it)
    Charlie noticed that the pressure guage wasnt working. It stopped in the first week we owned the machine and I figured that the pain of losing the machine for 1-2weeks while it was repaired was more than the pain of living without a guage. Once we started pulling shots Charlie observed that the three way valve was not working. Im now convinced that the two are related. The first option was to leave the blind filter under pressure overnight with the machine in standby mode in the hope that the cafetto and pressure would release the blockage. All this achieved was to deform the blind filter
    While the cover was off I used the link above to check a few things. I removed and dissaembled the 3-way valve which was in surprisingly clean condition. I clreaned it anyway
    I then back-tracked using Martrix air trick and located a blockage in the group head bw C and the swage fitting at the rear of the head. Ill pinch his diagram to explain

    When I blow through B. Air it doesnt come out C. I had the 3-way valve disconnected but Im fairly confident its not the culprit as I can hear the solenoid clicking when I hit the brew button and Ive just cleaned it internally.


    Im right in thinking that air should come out C. yes?
    I spent all afternoon squirting cafetto down into the orifice (from both ends) with a syringe and poking with s/s wire. Left it o/night with cafetto soaking but still no air would travel though. I reassembled this morning because I wanted a coffee and I was hoping in my heart that a backflush would blow out the blockage after the attention of yesterday. But Im still in the same situation.

    Im hoping to draw on CSs collective brainstrust to offer me a better way to unblock it or am I just gonna have to bite the bullet and buy a new group head?

    The machine is two years old so its well out of waranty and Im not prepared to put up the fight with SB that its a waranty job because it occurred during the warantee period - two chances Id get a good result from that one I reckon :-[

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