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Thread: Problem with Bezzera BZ35E

  1. #1
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    Problem with Bezzera BZ35E

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi everyone,
    I have just bought my first commercial machine (2nd hand Bezzera BZ35E).
    It comes up to pressure and temperature, but no water comes out of the head.
    Any clues as to the problem?
    I am keen to repair it myself but at this point dont know how they tick.
    Thanks.
    Cam



  2. #2
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    Re: Problem with Bezzera BZ35E

    Hi Cam,

    I remember seeing this machine up on ebay - from memory the ad said the bottom right touchpad doesnt work?

    If it sounds like it is pumping, I would be checking out the three way valve. It might need a clean.

    Damian.

  3. #3
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    Re: Problem with Bezzera BZ35E

    Hi Damian,
    I will check out the valve when it arrives.
    (I posted this question before the machine arrived so I have some idea where to start).
    I dont even know if it is pumping yet as i am only going off the sellers description.
    It is good to know the valve may only be blocked rather than broken.
    (Im sure i have a lot to learn)
    Thanks.
    Cam

  4. #4
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    Re: Problem with Bezzera BZ35E

    the machine has arrived but came with no plumbing connection pipes (I would have thought they would come with it).
    Anyway, I opened it up to have a look, noticed some of the electrical connections looked corroded. I cleaned them up, connected a temp water supply and the machine works perfectly.
    The only problem is it has not been maintained and the buildup of gunk is terrible.
    Can anyone tell me how to clean thick gunk off the inside of the group and group handles?
    Where else will i need to clean?
    I suppose i will need to clean out the boiler as well. Can this be done without taking it out?
    Thanks all.
    Cam

  5. #5
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    Re: Problem with Bezzera BZ35E

    Cam:

    "I suppose i will need to clean out the boiler as well. Can this be done without taking it out?"

    No, you need to undo all the pipes and take out the heating element and the HX as well. I will probably recommended you to change the HX usually get a lot of gunk (if the previous owner did not use any filter.

    Barazi has the diagrams in their website if is any help.

    Do not forget to clean the group re-stricter jet and the fill re-stricter jet as well.

    Good luck and have fun.

    Renzo

  6. #6
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    Re: Problem with Bezzera BZ35E

    OK, boiler is out, all pipes are off, now how do i clean the boiler???
    What cleaner or chemicals are recommended?
    Yes, the exchanger has some gunk in it but can it be cleaned?
    What are the the "group re-stricter jet and the fill re-stricter jet"?
    Is there a good way to clean or soak the inside of the dirty pipes?
    Sorry I have so many questions. First time for me (having fun though).
    Cam

  7. #7
    Mal Dimal's Avatar
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    Re: Problem with Bezzera BZ35E

    Gday Cam,

    Welcome to CoffeeSnobs mate...... [smiley=thumbsup.gif]

    One of our Site Sponsors "Bombora" (link over on the L/H side of the page), have an excellent range of espresso machine cleaning and descaling products and would highly recommend your contacting them for specific information and the locale of their nearest retailer to you.

    All the best, :)
    Mal.

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    Re: Problem with Bezzera BZ35E

    Cam@mcl;

    good morning, so all pipes are out and you have the boiler now good.

    restricters jet are located in the in the pipes foing from the HX to the Solonoid.

    Resticter is located before the fill solonoid.

    Enclose link of the diagrams of your machine http://bezzera.it/pdf/BZ35_GB.pdf

    Any question give as a call will be happy to help.


    Regards


    Renzo

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    Re: Problem with Bezzera BZ35E

    Hey Cam

    You could probably learn a lot about the exercise by looking at some of the restoration threads in this category.

    I would suggest that http://coffeesnobs.com.au/YaBB.pl?num=1175840909 is probably one of the most informative in terms of what you are looking to do (and I wouldnt be using CLR either, but I do have a swimming pool....)

    Regards

    SD

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    Re: Problem with Bezzera BZ35E

    Thanks for the tips SD and Renzo.
    I cleaned all the copper and brass parts with Hcl acid and the rest with citric acid or detergent.
    All went really well.

    The machine is all back together & looks great but is not working.
    It fills with water, heats up, steams beatifully but the pump is not working.
    Water comes out of the group but there is no pumping sound and not much pressure.
    Any ideas?
    I am thinking it might be a solanoid. How would i check?
    Cam


  11. #11
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    Re: Problem with Bezzera BZ35E

    Water comes out of the group but there is no pumping sound and not much pressure.
    Any ideas?
    Try this first

    Have you fitted the PF in to give a little resistance ?
    Try it with a blind filter in the PF for about 10 seconds

    It may be as simple as that I hope :)

    KK

  12. #12
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    Re: Problem with Bezzera BZ35E

    That sounded promising but after trying a couple of times with the blind filter, no success.
    Plenty of back pressure but still no pump.
    Thanks
    Cam

  13. #13
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    Re: Problem with Bezzera BZ35E

    Hi again Cam,

    Dont know if youre "au fait" with reading electrical schematics, but have attached one for your machine that you might find helpful.

    Cheers mate, :)
    Mal.


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    Re: Problem with Bezzera BZ35E

    Im not much good with elec schematics.

    I have tried turning the shaft of the motor that drives the pump to see if it was freely turning.
    I found that it moves but only about 10 degrees. Seems that something is stopping it.
    I dont know if this is normal.
    Does anyone know?

    I will pull it all apart and check it out unless someone knows if this is normal.

    It still doesnt explain why there is no noise at all though.

    mmmmmmmm?

    Cam

  15. #15
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    Re: Problem with Bezzera BZ35E

    Quote Originally Posted by cam@mcl link=1215519871/0#13 date=1217163656
    Im not much good with elec schematics.
    Offer your local electrician some beautiful fresh coffee and see if he can help you out... ;)

    Quote Originally Posted by cam@mcl link=1215519871/0#13 date=1217163656
    I have tried turning the shaft of the motor that drives the pump to see if it was freely turning.
    I found that it moves but only about 10 degrees. Seems that something is stopping it.
    I dont know if this is normal.
    Does anyone know?
    Is this with the pump still attached to the motor? If disconnected and the motor shaft is still that hard to turn then Id say the bearings are shot and maybe even worse than that... :(
    If still connected to the pump, try separating the two and try again. The pump shaft can be quite tight but so long as it is smooth to turn by hand with no rough spots, etc it should be ok. If it is really rough or almost impossible to turn, even with a small spanner on the flats of the shaft, then the pump is probably cactused...

    Cheers mate,
    Mal.

  16. #16
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    Re: Problem with Bezzera BZ35E

    BEZZERA NOW FIXED AND WORKING BEAUTIFULLY. [smiley=happy.gif]

    The Pump was fine.
    A friend helped find a loose connection in the power to the pump.
    A quick fix.

    The machine is now all plumbed in and ready for some practice.

    THANKS TO ALL WHO HAVE HELPED ME.

    (I have had a lot of fun. might do it again)

    Cam


  17. #17
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    Re: Problem with Bezzera BZ35E

    Wow Cam - a work of beauty - and red! Congrats

  18. #18
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    Re: Problem with Bezzera BZ35E

    Excellent stuff Cam, great to see mate..... [smiley=thumbsup.gif]

    Mal.

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    Re: Problem with Bezzera BZ35E

    beautiful machine - im in the middle of repairing mine - will hopefully post again when its going well!

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    Re: Problem with Bezzera BZ35E

    quick question - does anyone here know how to disassemble the solenoid valves in the BZ35e, to descale?

    All descriptions Ive read say you undo a bolt, but mine have a clip-type arrangement on top - how does this come off?

    Cam, did you take these apart / do you know how to do it?
    thanks!

  21. #21
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    Re: Problem with Bezzera BZ35E

    Hi all,

    I have a 2nd hand BZ35e that has come into my possesion. I think it need a little work and was thinking it was too much effort. Your posts have made me re-think that though and now I am thinking about fixing it up.

    It sounds easier than I thought. Is there anyone still posting that has worked on one? And if so would you mind if I asked some more questions?

    Cheers,

  22. #22
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    Re: Problem with Bezzera BZ35E

    Its worth it! Its easier than it first seems - as long as you keep track of everything as you take it apart, note down wiring etc, and clean it up before reassembly. Go for it!

    Mine has given me faultless service for a year now. Worked on it at weekends, Jan - Mar 09, finished by March, minor tweaks since then (eg new legs for the machine).

    If you study the schematics, its simple enough.

  23. #23
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    Re: Problem with Bezzera BZ35E

    I just found another great post from wan at http://coffeesnobs.com.au/YaBB.pl?num=1276132432/0, I think a service will give me a good starting point and if it still wont suck water Ill go from there.

  24. #24
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    Re: Problem with Bezzera BZ35E

    what pump is in it?

    a rotary or vibe ?

    just be aware rotary pump (procon / rotoflow / etc) dont like to self prime and they need help with either line pressure or the water "above" the pump so water is always "at the pump"

    yes they will suck from a bucket but i have found they dont like to self prime

  25. #25
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    Re: Problem with Bezzera BZ35E

    Im not sure what kind of pump is in it. I can hear it trying and it sounds fine, but nothing is coing out. I did get it working about a year ago, then it went in the "later" basket. I pulled it out a few weeks ago and it isnt sucking.

  26. #26
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    Re: Problem with Bezzera BZ35E

    well i reckon you need to have a look :) you should be able to take the top off easy

    rotary looks like



    questions for you for us to try to help
    does it have a water tank or do you plumb it in?
    if plumb in how are you getting water to it
    if you can hear it trying make sure it has water.

    if your trying to run it via a bucket you can help it by holding the pipe to a tap and just pumping water into it so i forces some water up to the pump then it might prime and suck from a bucket.

    if trying the above i do it with the power OFF and just prime the pump, then turn it back on and test. BE SAFE 240 = DEAD !!!

    running the pump dry is bad if its rotary......



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