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Thread: Pump problems

  1. #1
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    Pump problems

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi,

    A couple of days ago, I was making a few coffees, and during the extraction of the 8th coffee, the machine started making a humming noise instead of the usual noise.

    I played around with the machine and found that it makes the humming noise when it tries to take water from the tank to refill the boiler. Even though the water tank is filled up, no water is sucked through the tube. I opened up the machine thinking it was the pump, but it vibrates away even if no water is being pulled through.

    Anyone with any ideas on what the problem could be or what I could try to solve it?

    Thanks.

  2. #2
    A_M
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    Re: Pump problems

    Quote Originally Posted by 43564D424257504156240 link=1268761168/0#0 date=1268761168
    Hi,

    A couple of days ago, I was making a few coffees, and during the extraction of the 8th coffee, the machine started making a humming noise instead of the usual noise.

    I played around with the machine and found that it makes the humming noise when it tries to take water from the tank to refill the boiler. *Even though the water tank is filled up, no water is sucked through the tube. *I opened up the machine thinking it was the pump, but it vibrates away even if no water is being pulled through.

    Anyone with any ideas on what the problem could be or what I could try to solve it?

    Thanks.
    Sorry Griffster... Without knowing what machine you are using it is a bit hard..

    Bit like how long is a piece of string :D

    My first guess is a solenoid after the pump... but that depends on if there is any components prior to the pump... even a filter for eg..

  3. #3
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    Re: Pump problems

    Thanks for the reply AM.

    My machine is an older style VBM Domobar Super, and there are no components prior to the pump.

    There are 3 pipes that plug into the pump. 2 go into the water tank (the ones draws water from the tank and the overflow I assume) and one goes into the boiler.

    Im not sure if its the pump that sucks water from the tank, but I unscrewed that third pipe that leads to the boiler (and put it in a cup) and turned the machine on. No water goes through this pipe and I still get the humming. :(

  4. #4
    Gra
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    Re: Pump problems

    The pick up pipe hasnt sucked to the bottom of the tank has it ??

    Cheers Gra.

  5. #5
    A_M
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    Re: Pump problems

    Quote Originally Posted by 6F7A616E6E7B7C6D7A080 link=1268761168/2#2 date=1268791281
    Thanks for the reply AM.

    My machine is an older style VBM Domobar Super, and there are no components prior to the pump.

    There are 3 pipes that plug into the pump. *2 go into the water tank (the ones draws water from the tank and the overflow I assume) and one goes into the boiler.

    Im not sure if its the pump that sucks water from the tank, but I unscrewed that third pipe that leads to the boiler (and put it in a cup) and turned the machine on. *No water goes through this pipe and I still get the humming. * :(
    For gawd sake be bloody carefull..

    This is 240V and if there was a blockage and or something happened and water went every where you could be in big trouble...

    Secondly, just because you get a cup full from the head; dont think that is what comes out of the pump.. *

    But without knowing the plumbing and cct I can still only suggest *a blockage or failed solenoid or the OPV valve has failed / got a bit of gunk in it..

    A sponsor that knows this machine could be around the corner..

    Unless this:

    Quote Originally Posted by 784D5E3F0 link=1268761168/3#3 date=1268793163
    The pick up pipe hasnt sucked to the bottom of the tank has it ??

    Cheers Gra. *
    If Gra is correct your fine... If this is not the problem;

    *** Get it to a service centre ASAP before you hurt the machine or *yourself..



  6. #6
    TC
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    Re: Pump problems

    Agreed AM,

    This will be either the solenoid coil or the pump...

    I would also recommend that this is a job for a service agent rather than guess work...

    Chris

  7. #7
    Gra
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    Re: Pump problems

    Quote Originally Posted by 5B6E7D1C0 link=1268761168/3#3 date=1268793163
    I mean the pipe from the water tank AM.. :-X

  8. #8
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    Re: Pump problems

    Quote Originally Posted by 536675140 link=1268761168/6#6 date=1268795067
    Quote Originally Posted by 5B6E7D1C0 link=1268761168/3#3 date=1268793163
    I mean the pipe from the water tank AM.. :-X
    Ya... As per usual txt does not read the way it does in my head..

    I was suggesting that if your suggestion is correct..

    Then great, if *NOT; then who ya gunna call ???

    My post edited to reflect what I think I said / meant / typed *:-/

  9. #9
    Gra
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    Re: Pump problems

    Quote Originally Posted by 220D0406112E020D0204060E060D17630 link=1268761168/7#7 date=1268795615
    My post edited to reflect what I think I said / meant / typedUndecided
    No probs mate, I have had it happen to me thats all Cheers Gra. :)

  10. #10
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    Re: Pump problems

    Quote Originally Posted by 6F7A616E6E7B7C6D7A080 link=1268761168/2#2 date=1268791281

    For gawd sake be bloody carefull..

    This is 240V and if there was a blockage and or something happened and water went every where you could be in big trouble...

    Secondly, just because you get a cup full from the head; dont think that is what comes out of the pump.. *

    But without knowing the plumbing and cct I can still only suggest *a blockage or failed solenoid or the OPV valve has failed / got a bit of gunk in it..

    A sponsor that knows this machine could be around the corner..

    Unless this:

    Quote Originally Posted by 784D5E3F0 link=1268761168/3#3 date=1268793163
    The pick up pipe hasnt sucked to the bottom of the tank has it ??

    Cheers Gra. *
    If Gra is correct your fine... If this is not the problem;

    *** *Get it to a service centre ASAP before you hurt the machine or *yourself..

    AM: Sorry, I must not have phrased it correctly. *No water came out of the pipe, and the pipe was placed in a cup in case so that if water did come out it would flow into the cup giving me time to turn the machine off.

    Gra: Nope, the pick up pipe hasnt sucked to the bottom of the tank so unfortunately this is not the problem. * Thanks anyway. *:(

    Thanks for all the responses... Ill make an appointment and send it in for a service at Veneziano asap.

  11. #11
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    Re: Pump problems



    Feel like a bit of an idiot, was just writing down an opinion on your problem but i think we repaired it for you last week!!

  12. #12
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    Re: Pump problems

    And for everyone else - A new ulka 5 pump sorted everything out nicely!!

  13. #13
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    Re: Pump problems

    Quote Originally Posted by 7B002330420 link=1268761168/10#10 date=1269672136

    Feel like a bit of an idiot, was just writing down an opinion on your problem but i think we repaired it for you last week!!
    ;D

  14. #14
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    Re: Pump problems

    Quote Originally Posted by 2B507360120 link=1268761168/11#11 date=1269672231
    And for everyone else - A new ulka 5 pump sorted everything out nicely!!
    Problem sounds as though the embedded Diode in the Pump Solenoid has failed.... A new Coil should fix that ;)

    Mal.

  15. #15
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    Re: Pump problems

    Quote Originally Posted by 3F446774060 link=1268761168/10#10 date=1269672136

    Feel like a bit of an idiot, was just writing down an opinion on your problem but i think we repaired it for you last week!!
    You did! *And I would recommend Craig at 9Bar Espresso Services to anyone who is having problems with their coffee machine. *Ive had him fix up a number of my machines over a few years and hes always been fantastic! * :)



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