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What have I done? (Cimbali Jr thread)

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  • #16
    Well, everything is looking nice and shiny onside now, my parts have all arrived (thanks Pedro) but I've hit a snag & I was hoping somebody who has done this rebuild may be able to give me a couple of pointers.
    I thought that I had photographed every piece of wiring I possibly could, however I have found this earth cable and I have no idea where it is supposed to clip to. There are two clips there, one clips to the cover of the electronics compartment, I can't for the life of me find a spade for the other one to go on. Amy clues?



    The other thing is, I don't know what that thing there is called, what it does, or where the hose from the back of it is supposed to go.



    Thanks, I can't wait to get this thing fired up!

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    • #17
      The ground wire most likely connects to the panel that mounts near it. The hose is probably the one that connects the overpressure valve to the drain box. The overpressure valve is the brass part in the foreground of the picture. The nipple where the hose attaches is on the side away from the camera. There will be a similar nipple on the drain box.


      Java "Getting to know a new toy is so much fun" phile
      Toys! I must have new toys!!!

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      • #18
        OK, I figured out that the spade the earth wire was supposed to connect to had snapped off, so have soldered it in place for now. The hose from the overpressure valve is connected, I have replaced the antivac valve (thanks Chris), my brother in law (sparky) has checked the electrics and now I think I am ready to fire it up. I currently do not have it plumbed in (it is in the shed) and am wondering what to do to prime the boiler. I assume if I switch it on, the element will switch on immediately and burn out if there is no water in the boiler? I can take it inside to plumb it in if required to fill the boiler, however I would like to bench test it in the shed before moving it inside.
        So, am I right in thinking that it is a BAD idea to turn it on without any water in the boiler, and if so, is there a way to fill it before the element turns on?
        Cheers

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        • #19
          hJust realised that the autofill probably controls the element, correct? I think I'll just go ahead and try it out, wish me luck and thanks for the help!

          Edit: well, I plugged it in and switched it on for about 5 seconds. The pump didn't turn on so I switched it back off. I felt the side of the boiler after this and it was a little warm, so I guess I was wrong about the element not switching on. That, or my autofill is faulty, which could explain why the pump isn;t switching on I guess. I am out of time for today, will have another crack on my next day off.
          Last edited by magnafunk; 13 July 2014, 07:51 PM.

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          • #20
            If you're worried about a dry boiler and potential long fill time, the best option is to isolate the element and then try the the fill. If all goes well, power down and disconnect from the power and then bring the element back in.

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            • #21
              +1 to above.

              However if you don't want to isolate element , then you can always remove a fitting on the top of the boiler (eg pressure relief valve) and manually fill the boiler using a small funnel, (and then reinstall removed fitting/valve).

              Obviously ensure power is isolated to machine prior to removing covers and accessing internals of machine

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              • #22
                Thanks that was my next idea when the brother in law is next over. For now I must spend some time with my partner and explain to her why I need to spend so much time on this machine when the gaggia ts works perfectly

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                • #23
                  That's a really good idea Mouldy, back to the shed with me.

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                  • #24
                    Welcome, just remember not to overfill, you just want to ensure that the element is at least fully covered. That way, when you switch on you can see if auto fill is working without worrying about element.

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                    • #25
                      Well, I turn it on and hear the pump click and nothing happens. It looks like it takes the same Ulka pump as the Brasilia I have in the shed so I will try and swap pumps after the Brasilia has cooled down enough to disassemble...

                      edit: Ok, so it isn't the pump, looks like I just have to have it hooked up to mains pressure to fill the doser. In other good news, it got up to 1 bar pressure and it had only sprung one leak. I released the pressure, put some teflon tape around the errant seal and it is now all sound. However, trying to run a shot through and water is spraying everywhere around the group. Have just replaced the gasket, maybe I have not seated it right, will check it again on next day off, when I will also be dragging the beast inside to see if she works!
                      Last edited by magnafunk; 13 July 2014, 10:51 PM.

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                      • #26
                        Group head may be gunked with coffee resin. Commercial-grade back flush may be required. Sometimes I remove the group and soak it in detergent and boiling water to loosen the old coffee oils.

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                        • #27
                          Addendum: replace shower as well.

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                          • #28
                            ... and only because you look very handy at disassembly. A cleaned up group produces such good clean water.

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                            • #29
                              OK, it's been a long time between posts, I have had plenty of other things on so this had taken a back burner. I have gotten the old girl reassembled and set up inside and it is making great shots. The water spraying out the group was simply because I was missing a screw! However after getting the grinder dialled in and learning to use the machine (the steam power is phenomenal!) I went and did a few things up the street and came home to about half a cup of water on the bench. Somehow I have lost a piece of the "dosing chamber" somewhere between disassembly, descale and reassembly. The problem is, I don't even know what I am looking for. There don't seem to be any parts diagrams around for this model, coffeeparts don't stock any bits for the dosing chamber and I have called Coffex who don't really sound interested in such an old machine. I was hoping somebody who has the same model can have look at the 2 photos and tell me what I am missing, and hopefully it is something that can be replaced with a generic or jury rigged part.





                              There is something missing that goes between the inlet pipe and the nut that holds the chamber in and I have no idea what. Here is a photo of another guys resto that you can see something but it's hard to say what. (Image is from Izambard's rebuild thread on HB)



                              Thanks everyone for the help so far.
                              Last edited by magnafunk; 19 August 2014, 12:45 PM. Reason: credit due

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                              • #30
                                Hard to say from the pics included but you would need at least one if not two washers. One between the nut and the chamber for sure I would think, and possibly another underneath the chamber. With-out at least the one you won't have a watertight seal there. Any material that is soft enough to form a watertight seal, designed for constant water exposure, and is food safe should do the trick. A silicone one should work nicely.


                                Java "Long live Cimbali!" phile
                                Toys! I must have new toys!!!

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