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Thread: Help! Compak K5 Refurbishing project

  1. #1
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    Help! Compak K5 Refurbishing project

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi, I am a new member here. I have posted this request on CoffeeGeek, but have had minimal response. Can any of you help me? It seems to me that the Compak brand is more common down under than it is in Canada.

    Here is what I have;

    An older model K5 used in a cafe for unknown years
    Burr fineness adjustment jammed
    I suspect it is glued to the casing with all the crud left on it
    How do I get the top burr carrier out?

    I have already taken apart everything I could and cleaned it carefully. I McGyvered the doser spring, it had been broken. I am just anable to get that top burr carrier out, and consequentially, cant adjust the grind or inspect/clean the burrs and interior.

    Any help would be greatly appreciated. I have 15 years of electro-mechanical experience, just not in the food sector.

  2. #2
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    Re: Help! Compak K5 Refurbishing project

    Well, this afternoon, I took a closer look at the upper burr carrier, and I also found a manual/owners guide for the Compak K5. The closer look at the burr carrier made me look closely at the owners guide. It seems the burr carrier is threaded and that the carrier needs to be turned clockwise in order to unscrew the carrier from the chassis. I tried lapping with a hammer around the sides of the burr carrier, and inserted a flat head screw driver into one of the three slots in the burr carrier, tapped the screw driver with my hammer, but it is still not budging.

    In a purely mechanical world where I wasnt worried about contaminted the food, I would squirt a little of WD-40 or other lubricant into the threads and try again. What do I do here?

    I am desperate now, I have to justify the purchase to a significant other who thinks Im crazy.

    Please help!

  3. #3
    Senior Member Magic_Matt's Avatar
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    Re: Help! Compak K5 Refurbishing project

    Maybe go the WD40, then clean everything well with boiling water before reassembling? Ive used WD40 in the kitchen before and it hasnt hurt me *twitch twitch* ;)

    What kind of fitting does the burr carrier have - just the three slots? If you could fashion some kind of fitting to attach to it, then use a large wrench or similar to twist the fitting, the extra leverage might do the trick.

    Also wonder if the grind fineness adjuster might explain why the burr carrier is jammed - does the manual show how these fit together? Eg, there might be a broken cog or some such from the fineness adjuster preventing the burr carrier from unscrewing. Could you disassemble the fineness adjuster first?

  4. #4
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    Re: Help! Compak K5 Refurbishing project

    This morning I woke up with the idea of trying some cooking oil for lubricant/penetrating oil and using a large pipe wrench to turn the upper burr carrier. If that doesnt work, I will probably try the WD-40. As for a three slotted tool, I dont have access to anything that would work for that. Hopefully the pipe wrench will work. Now, all I have to do is find it. Last time I saw it was three houses ago...

  5. #5
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    Re: Help! Compak K5 Refurbishing project

    runby

    I have a K8, its upper burr carrier unscrews clockwise, so I presume its a similar construction.

    The brass threads are beautifully machined, all in all a very nice piece of hardware. When I got mine it was gunked up with coffee, it was a little tight to move, but it felt well lubricated....coffee is more oily than sticky.

    Im surprised you cant budge it, I take it you tried both clockwise and anticlockwise rotations.
    My guess is that somehow the burr carrier has been cross threaded, rather than being gunked up with coffee, which is probably not good news.

    Also it will be hard to administer lubricant since the upper carrier effectivly covers the threads, but I suggest you try and get in as much as possible, leave it overnight and then try again.
    Once it fully disassembled it will be easy to clean out.

    As m@ suggested, I think you will also need to fabricate some kind of tool/wrench to get the maximum grip and torque.

    Otherwise, an ultra sonic bath may be able to shake some action.

    Good luck, I also have a generic compak exploded assembly diagram, If you want it send a pm with email.



  6. #6
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    Re: Help! Compak K5 Refurbishing project

    Thanks reubster,

    You confirmed a few things I was unsure of. When you read these Italian Translation (or in this case Spanish) you always wonder if they got the directions right. Is it clockwise, or anti-clockwise. Now I am 100% sure. Actually, it is also logical if you consider the mechanism for the adjustment is the raising and lowering of the top burr carrier. I really hope it isnt crossthreaded. I guess Ill find out.

    From what Ive seen so far, this is from another cafe that closed and looks like it was never cleaned during its full commercial lifetime. I had a really tough time removing the caked on gunk from the doser. I imagine the same thing has happened on the upper burr carrier. I found another guy that ran into the same thing with a K5, and he had to use four days of WD-40 along with some judicious tapping with a hammer.

    Wish me good luck. Any thoughts on using the pipewrench to twist the upper burr carrier? Good idea? Or not?

  7. #7
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    Re: Help! Compak K5 Refurbishing project

    Hey Just a obvious thought, in case weve overlooked it.

    At the front of the carrier [located under the doser cover] there is a grub/locking screw that is tightened to hold the carrier firmly in place...................have you loosened this?

    If this was done up very tight, it could certainly cause the locking problems you are experiencing.

    Re the pipe wrench, I wouldnt go there myself since brass is relatively soft and Id hate to damage it.
    My upper burr carrier has a plastic cap that is held on with three allen screws.
    Id consider removing this *cap and making up a tool eg: a piece of mild steel fitted with small three bolts [that could fit into the existing carrier screw holes]. This would give you a good grip/torque and be less likely to damage anything.

    Ive emailed you a more detailed exploded diagram and a contact that may be of assistance.

  8. #8
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    Re: Help! Compak K5 Refurbishing project

    Thanks reubster,

    I got it off! I finally found my pipewrench, but alas, it was too small. However right beside it, I had my humongous bench vice. It weighs about the same as the grinder.

    This morning, I used a toothpick to put a very light cooking oil into the threads and let it soak a while. I then very carefully tightened the bench vice onto the top burr carrier after removing the plastic cover, and turned. The first time, it slipped, so I tightened it a little more, and it moved. Fortunately, the threads were not damaged.

    There is an aweful lot of coffee crud stuck everywhere. It is almost like cement! I removed the burrs and the top carrier and am currently soaking them in coffee cleaner.

    Now I have a new problem, and unless I can jigger something up, I will have to make a jig something like you seggested for the top carrier to go into the bottom burr carrier screw holes. I want to get that off because some coffee crud got underneath it and is rubbing, causing the motor to not spin smoothly. It is the only thing I can think of to stop the motor from turning so that I can unscrew the nut holding the lower burr carrier to the motor.

    BTW, I didnt get the expanded diagram. Please send them here;

    run61athotmail.com

    replace the first word of my address with my username, and replace the second word with the symbol. That will work.

    Thanks,
    Byron

  9. #9
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    Re: Help! Compak K5 Refurbishing project

    OK, it is back together and grinding. I put a little light cooking oil into the threads of the upper burr carrier before I screwed it carefully back into the base. Everything seems to be working well, however I will have to do something with that doser! There is way too much wastage! And I may also try to figure out a way of increasing the number of grind settings in the espresso area.

    I got the bolt off, but I still couldnt get to bottom burr carrier off of the motor. I decided to clean things up as well as I could and then I put it back together. All is good. I ground myself some yirgercheffe beans...and ambrosia. Mmmmm, mmmmm. I love that flavour.

    The burrs are still sharp. In fact, they are quite a bit sharper than my nearly new KitchenAid Proline grinder. What a mistake that was! Unfortunately, by the time I realized I wanted a better grinder, it was too late to return it.

    There was no locking screw underneath the doser cover. I guess that is from a newer model.

    No regrets, an inexpensive fully functional commercial grinder now sitting on my counter. I wonder what my significant other will say?

  10. #10
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    Re: Help! Compak K5 Refurbishing project


    Runby

    Thats great news.

    Ill resend that exploded diagram today.

    On my K8, you can pull a lot apart from underneath, so this may be a solution to getting access to the motor and lower burr.

    Out of interest, does the nut that holds the lower burr to the motor undo in a clockwise or anticlockwise direction?...........Im not 100% sure, but since the motor spins anticlockwise, it would make sense to have this nut tighten in the anticlockwise direction.

    Bits required to fix the doser should be readilly available and Ill include the details in the email.

    The chute on mine also retains a large ammount of grinds [probably the only real gripe I have with it].
    For a while I used to sweep out the excess with my finger into the doser to complete the dose, but it took too long to wait for the grinder to stop spinning.
    I stumbled onto a great solution though, I use the rubber suction cup from a plumbers plunger to "airblast" the remains in the chute straight into the doser. It now doubles as the "lid" since I dont use the hopper.

    see the following link: http://coffeesnobs.com.au/YaBB.pl?num=1188905934

    The other thing I noticed after cleaning out the gunked up threads was that there was a little play between the upper & lower carriers.
    I wrap teflon tape around the thread and it works really well, plus no coffees ever going to gunk up that thread again.

  11. #11
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    Re: Help! Compak K5 Refurbishing project

    I got it reubster...Thanks. I also saw your post about using a plunger to get out excess coffee. I will have to try that.

    The nut that undoes the bottom burr holder unscrews clockwise...I think. I just looked at the top thread to verify.

    I didnt notice any play in the threads for the upper burr carrier and the case, but Ill check that out the next time I clean it.

    There doesnt seem to be anything wrong with my doser, except that it leaves a lot of coffee in the chambers. That is why I want to rig something up for it. Normally, I dont need to grind any more coffee than for two cappuccinos. It is possible, that my grinder being at least 5 years old, may not have benefitted from the latest mods by Compak.

    This household is a cappuccino household. So far, I havent acquired the taste for espresso, but that may change. I will try one of the local synessos to see what I think.

    Take care,
    Byron


  12. #12
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    Re: Help! Compak K5 Refurbishing project

    Runby,

    Mines a 2003 model so its probably a similar age.
    But there may be a difference between the models.

    Try sticking self adhesive velcro tape under each of the vanes [use the furry side] that may be all it needs.
    Other grinders like [I think] rockys had vanes that were a little too short so a common mod was to lengthen them with a bit of gaffa tape.

    I only put enough beans for a double into the throat of the grinder and then "grind through" the chamber.
    The doser is still very useful because it breaks up the clumps, and dumps beautifully into the PF, "thwack" as you grind so that each segment holds only a small ammount of coffee ......and youll get very little spillage.



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