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Thread: Yikes In the red

  1. #1
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    Yikes In the red

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hiya ,
    I inherited what seems to be a "La Cimbali Junior" , I think its a model D/1 ( cant make out exact ). Fired her up this morning ( in the shed/ studio) . I was enjoying my first baristatic attempt , when I glanced down and saw pressure gauge needle gently move south out of the red and off the scale ( 2.8 bar +) after scalding all mouth parts and some throat , slopped hot coffee onto lap whilst lunging for the of switch.

    I cant imaginge operating pressure to be more than green zone ( about 1.8 bar max)
    sooooo
    Is gauge faulty ( no steam / hot water venting / relief was happening?
    Is it worth fixing?
    Is there a manual somewhere?

    Appreciate any help :)

    Isleofview

  2. #2
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    Re: Yikes In the red

    Yes it is worth fixing!


  3. #3
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    Re: Yikes In the red

    I would say that a +/-$3000 USD machine is indeed worth fixing. if that high pressure occurred on your first attempt at using the machine it would not be unreasonable to assume one (or more) of the following:
    - the pressurestat had been fiddled with by the previous owner. Be aware that turning the adjustment screw too far can damage the pressurestat, so do some research on that model of Pstat before adjusting.
    - the line to the pressurestat or its diaphragm is scaled or clogged with crud (my first guess)
    - the contacts are fused on the pressurestat.

    Pull the shower screen and the hot water wands screen (if so equipped). These will be basic indicators of the machines maintenance history. Next is to pull the water level sensor out of the boiler to check for scale. DO NOT just pull the sensor rod out- loosen the comperession nut and take the entire assembly out. If the rod is scaled and you just pull it out there is a good chance of damaging the seal.

    From there you can make further assessments as to what to do next.

  4. #4
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    Re: Yikes In the red

    Thanx for advice ,

    so far
    Background - machine was suposively " serviced" before sitting for aprox 1 year , up until a few days ago.

    1 I have checked water level sensor found minimal scale
    2 I have cheched copper line from boiler(reliefvalve) to pressurestat , no scale , diaphram good nick, no scale.
    3. pressurestat contacts wired to 1 of 3, loose-ish connections and badly pitted contacts.

    Q1. Can I move to one of the other ( seemingly unused) contacts.

    Pressure is still reaching 2.8bar +


    Overall unit is in good condition , with some minor scale/ verdigris build up on some joints/connections/pipes.

    Thanx for any help

  5. #5
    TC
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    Re: Yikes In the red

    Hi Isle,

    Sounds pretty much like a dead pressurestat to me...

    Good luck with it...

    2mcm

  6. #6
    A_M
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    Re: Yikes In the red

    Quote Originally Posted by 7A78696A28190 link=1262045700/3#3 date=1262323163
    Thanx for advice ,

    so far
    Background - * machine was suposively " serviced" before sitting for aprox 1 year , up until *a few days ago.

    1 I have checked water level sensor found *minimal scale
    2 I have cheched copper line from boiler(reliefvalve) to pressurestat , no * *scale , diaphram good nick, no scale.
    3. pressurestat contacts wired to 1 of 3, loose-ish connections and badly pitted contacts.

    Q1. Can I move to one of the other ( seemingly unused) contacts.

    Pressure is still reaching 2.8bar +


    Overall unit is in good condition , with some minor scale/ verdigris build up on some joints/connections/pipes.

    Thanx for any help
    I was leaning towards what 2mcm said...... So where are you located ??

  7. #7
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    Re: Yikes In the red

    Thanx again for more solid advice

    Is it possible to rewire pressurestat to other , non pitted contacts?

    Im in Bunbury WA

    Ta :)

  8. #8
    TC
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    Re: Yikes In the red

    Hi Isle,

    I suspect that you might find that the membrane in the pressurestat is the culprit rather than pitted contacts.

    Depending on what it is, you may be able to source a new membrane kit. A replacement pressurestat will not be too exxy though.

    Cheers

    2mcm

  9. #9
    A_M
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    Re: Yikes In the red

    Quote Originally Posted by 2022333072430 link=1262045700/6#6 date=1262345489
    Thanx again for more solid advice

    Is it possible to rewire pressurestat to other , non pitted contacts?

    Im in Bunbury WA

    Ta :)
    Agree with 2mcm... Unless you can confirm it is the contacts... You just wasting time and effort...
    Try this sponsor.. http://www.coffeeparts.com/cimbali/cimbali-spare-parts-7.html

    PS... Electronic / Electrical work (all across Australia) should be performed by a qualified person BUT shall be tested by a licences person, prior to turning on.......

  10. #10
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    Re: Yikes In the red

    Once again great advice !

    whilst waiting for replacement pressure stat .

    Thought it be good idea to inspect element and boiler.

    found coating of scale on element and boiler AND loose chips and chunks of scale in the bottom of the boiler.

    Im tempted to strip the whole thing bare and rebuild/clean from the ground up.

    Q.1 Is this nessessary or is there some sort of magic pill that I can somehow inject to dissolve and flush away all the scale?

    Ta

  11. #11
    A_M
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    Re: Yikes In the red

    Quote Originally Posted by 7173626123120 link=1262045700/9#9 date=1262395642
    Once again great advice !

    whilst waiting for replacement pressure stat .

    Thought it be good idea to inspect element and boiler.

    found coating of scale on element and boiler AND loose chips and chunks of scale in the bottom of the boiler.

    Im tempted to strip the whole thing bare and rebuild/clean from the ground up.

    Q.1 Is this nessessary or is there some sort of magic pill that I can somehow inject to dissolve and flush away all the scale?

    Ta
    1: So what water are you using and how old... Will always be some scale... But teh Age and quality of water will be the major factors...

    2: magic pill - If ya find it... EVERY one will be ya friend ;D :D ;)

    Chemical de scale is slow and it all depends on the amount and type of scale.. With good water the odd desacale is more than enough...

    Just look at this one... http://coffeesnobs.com.au/YaBB.pl?num=1259915287/

    Had to sandblast teh boiler to get clean after 2 x 48hrs of soaking in de scaler... And teh elements were so far gone that the only option is to replace... Bugger..... Not funny... WHY... Non filtered tap water... :(

  12. #12
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    Re: Yikes In the red

    Thnx for response,
    I had a look at the link you posted, hmmmm
    put some pics up of my project.

    Unit has been shelved for about a year.
    Water was from mains through some sort of filter.

    http://picasaweb.google.com/Isleovview2/LaCimbaliJunior#

    The instants looking better by the minute !

    Be blunt , thick skinned

    Ta

    PS Ignore date on pics they were taken today

  13. #13
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    Re: Yikes In the red

    By looking at your pictures this machine needs a bit of love.

    regards

    Di Bartoli

  14. #14
    A_M
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    Re: Yikes In the red

    Quote Originally Posted by 4865534E6D7E786360650C0 link=1262045700/12#12 date=1262406258
    By looking at your pictures this machine needs a bit of love.

    regards

    Di Bartoli
    I recon a LOT of LOVE and PATIENCE...

    Some re wiring, NEW pipes and Brackets and clips... There has been some heat and or some one in with a blow torch....

    Ya may get away with the elements... But for any extended use... NEW...

    Love to see what an EST would show...

    Now, what should I charge for some sand blasting ??? You pay postage both ways and a few $$$ to cover beads and a donation to FC ;)

  15. #15
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    Re: Yikes In the red

    Update

    Onward with the love and patience!

    Its in bits (glad I took some pics).

    Very generous offer of bead blasting from Anger, tempting but!

    Im not sure this project wont end up binned.

    Started cleaning and inspecting.

    Amazing what hydrochloric acid does to scale (and copper too) dont leave it on there to long.

    There was some straining removing connections from boiler , was wondering if its silver braised or soldered? I may re do some /all welded joints.

    back to the 43 for now :-[

    Ta :-*



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