Results 1 to 41 of 41
Like Tree19Likes
  • 3 Post By level3ninja
  • 1 Post By Javaphile
  • 1 Post By herzog
  • 1 Post By ekrabappel
  • 2 Post By ekrabappel
  • 2 Post By Yelta
  • 1 Post By Javaphile
  • 1 Post By Jackster
  • 1 Post By Javaphile
  • 2 Post By Javaphile
  • 3 Post By ekrabappel
  • 1 Post By Javaphile

Thread: Help needed - 20 years of grinds in La Cimbali MD6

  1. #1
    Junior Member
    Join Date
    Jul 2019
    Posts
    18

    Help needed - 20 years of grinds in La Cimbali MD6

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I recently got hold of a La Cimbali MD6 grinder from a closed cafe. Although it is working, it has not been serviced in at least 10 years. In short, it needs a good clean (and probable burr replacement). The grind selector was stuck which indicated a lot of bound muck. After a bit of elbow grease I managed to remove the top brass burr holder. OMG - there was so much caked on grinds (even starting to oxidize the brass). I managed to get the top fixed burr off (after removing a stack of caked on grinds) and discovered a colony of mites or insects living under the burr. I suspect there may have been a few insects parts served with the coffee! I also finally managed to get the lower moving burr off however i need to get the brass holder off as I suspect there is a lot of crud under it. Trouble is, not quite sure how to do it. There is a central black plastic knob. I suspect I need to detach the burr holder from the motor axle but have no idea how. With brass being a brittle metal I don't want to force anything so am hoping some experts can help out. I also want to remove the grinds hopper and give a good wash in soapy water as it is filthy. But how does one do this in minimal steps?

    Also, stupid question, but what is the black projection that sticks out above where the portafilter used for?
    Oh, and when I take the top off the grinds hopper, there looks like a screw hole but no screw. Should there be one for some reason?

    Thanks

  2. #2
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    Worked out the black projection is a tamper. The bottom portion is broken off so I didn't recognise it as such.
    Replacement burrs - $600. What!!!! Think I'll wait a bit on that one. They're not razor sharp but not dull either so should be some life left in them.

  3. #3
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,771
    Welcome mate...

    Pretty sure you can get them for a lot less than $600...
    https://coffeesnobs.com.au/grinders/...mbali-md6.html

    Mal.

  4. #4
    Senior Member
    Join Date
    Aug 2013
    Location
    Rockingham W.A.
    Posts
    1,380
    I use a "double water trapped" compressed airline (full sized compressor) at 40 psi for all such issues. It may be your best friend...

  5. #5
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    Quote Originally Posted by Dimal View Post
    Welcome mate...

    Pretty sure you can get them for a lot less than $600...
    https://coffeesnobs.com.au/grinders/...mbali-md6.html

    Mal.
    Thanks for the welcome.
    Well that was the price listed at Coffeeparts as a special order. Are there any other parts suppliers in OZ besides Coffeeparts. These are the guys I have used before and the prices didn't seem that bad back then.
    Thanks for the link. Problem is, there is a big black ball on top of the shaft that prevents slipping a socket over. As it stands I can't get to the centre nut. I have a photo but it seems I can only link to photos on the web.

  6. #6
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    Quote Originally Posted by TampIt View Post
    I use a "double water trapped" compressed airline (full sized compressor) at 40 psi for all such issues. It may be your best friend...
    If I can get the parts out it might to the trick. To date I've been levering chunks out the a screw driver and chisel.

  7. #7
    Senior Member level3ninja's Avatar
    Join Date
    Nov 2013
    Location
    Sydney
    Posts
    1,463
    Quote Originally Posted by ekrabappel View Post
    If I can get the parts out it might to the trick. To date I've been levering chunks out the a screw driver and chisel.
    You'll leave less marks with something a little softer like a bamboo skewer.
    Dimal, lestone and 338 like this.

  8. #8
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,771
    Quote Originally Posted by ekrabappel View Post
    Thanks for the welcome.
    Well that was the price listed at Coffeeparts as a special order. Are there any other parts suppliers in OZ besides Coffeeparts. These are the guys I have used before and the prices didn't seem that bad back then.
    Thanks for the link. Problem is, there is a big black ball on top of the shaft that prevents slipping a socket over. As it stands I can't get to the centre nut. I have a photo but it seems I can only link to photos on the web.
    Yep, Coffee Parts are excellent to deal with but I did find a couple of other places that listed the burr-sets for a similar or slightly higher price than that listed in the thread I linked to. Google is your best friend in these situations.

    You only need one more post and then you'll be able to upload and include photos...

    Mal.

  9. #9
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    Quote Originally Posted by Dimal View Post
    Yep, Coffee Parts are excellent to deal with but I did find a couple of other places that listed the burr-sets for a similar or slightly higher price than that listed in the thread I linked to. Google is your best friend in these situations.

    You only need one more post and then you'll be able to upload and include photos...
    Will do. I've noticed a few posts relating to the use of Mazzer burrs in place of Cimbali but I've yet to find a post to confirm this can be done without problems.

    Ah... that explains it. I'll upload some pics soon. Thanks

  10. #10
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    Quote Originally Posted by level3ninja View Post
    You'll leave less marks with something a little softer like a bamboo skewer.
    Good point although a bamboo skewer might be a tad soft for this congealed gunk. A thicker bamboo spatula or the like would be good.

  11. #11
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    Hmmm... looks like I'm still stuck with posting image URLs. Bugger.

  12. #12
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,771
    Quote Originally Posted by ekrabappel View Post
    Hmmm... looks like I'm still stuck with posting image URLs. Bugger.
    Hmmm...

    Used to be that only five posts were required; might be ten now?

    Mal.

  13. #13
    Super Moderator Javaphile's Avatar
    Join Date
    Dec 2004
    Location
    Earth!
    Posts
    15,582
    Or he's not going about it in the right way.


    Java "Picture what?" phile
    Dimal likes this.
    Toys! I must have new toys!!!

  14. #14
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,771
    Quote Originally Posted by Javaphile View Post
    Or he's not going about it in the right way.


    Java "Picture what?" phile
    Yeah, there is that...

    Mal.

  15. #15
    Senior Member
    Join Date
    Dec 2009
    Location
    SYD
    Posts
    564
    Just putting it out there, but Iím not sure plowing good money into this machine is a great idea. Based on your description, it sounds pretty clapped out.

    Unless youíre wedded to the idea of doing it as a restoration project, throwing 600 bucks at it would probably be throwing good money after bad.

    That money would go a long way towards a quality new or lightly used grinder that will give you many years of service.
    Leaf_Bean_Machine likes this.

  16. #16
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,771
    Quote Originally Posted by Dimal View Post
    Welcome mate...

    Pretty sure you can get them for a lot less than $600...
    https://coffeesnobs.com.au/grinders/...mbali-md6.html

    Mal.
    As per above...

    Mal.

  17. #17
    Site Sponsor Leaf_Bean_Machine's Avatar
    Join Date
    Jul 2017
    Location
    Bibra Lake, Perth, WA
    Posts
    31
    Quote Originally Posted by herzog View Post
    Just putting it out there, but I’m not sure plowing good money into this machine is a great idea. Based on your description, it sounds pretty clapped out.

    Unless you’re wedded to the idea of doing it as a restoration project, throwing 600 bucks at it would probably be throwing good money after bad.

    That money would go a long way towards a quality new or lightly used grinder that will give you many years of service.
    Agree with herzog as there are probably a lot of companies out there, like ourselves, who rebuild grinders and sell them reconditioned with new blades too Cimbali has always had a bit of a reputation for costly and difficult to source parts. If you would like to contact us with a picture of your grinder, I could check if any of our blades are interchangeable and cheaper for you?

  18. #18
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    Quote Originally Posted by herzog View Post
    Just putting it out there, but I’m not sure plowing good money into this machine is a great idea. Based on your description, it sounds pretty clapped out.

    Unless you’re wedded to the idea of doing it as a restoration project, throwing 600 bucks at it would probably be throwing good money after bad.

    That money would go a long way towards a quality new or lightly used grinder that will give you many years of service.
    I don't believe the machine is "clapped out". Just dirty from 10+ years without a clean. The motor runs fine. All parts are intact except the broken tamper (I can live with that). The burrs maybe could do with replacement. When I purchased it I googled cimbali burrs and saw posts talking about $100-150. I paid $115 for the machine so am happy to spend $150 for new burrs, not $600.
    Dimal likes this.

  19. #19
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    Quote Originally Posted by Javaphile View Post
    Or he's not going about it in the right way.


    Java "Picture what?" phile
    knob.jpg

    No, I was going about it the right way. I now have access to computer file as well as URL. Maybe I was too quick to try and upload a picture after getting 5 posts.
    Dimal and Javaphile like this.

  20. #20
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    OK Previous post shows picture of the black ball on top of the shaft (was going to say black knob but it just didn't feel right!). The machine seems identical to other MD6 posts except for this. How do I remove the ball the access the nut holding the burr holder to the shaft?

    Will post an image of the whole machine this weekend.
    Last edited by ekrabappel; 19th July 2019 at 08:22 PM. Reason: More information

  21. #21
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    Attachment 22812

    The pupae of the critters living under the stationary burr.

  22. #22
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    The actual critters (Insecta coffeegrindus)

    Attachment 22813

  23. #23
    Senior Member Jackster's Avatar
    Join Date
    Nov 2017
    Location
    Maddington, Perth. Wa
    Posts
    976
    I can nearly smell that grinder from here

  24. #24
    Mal Dimal's Avatar
    Join Date
    Oct 2004
    Location
    Warwick, QLD
    Posts
    16,771
    Quote Originally Posted by ekrabappel View Post
    Attachment 22812

    The pupae of the critters living under the stationary burr.
    Oh yuk...
    At least it can be cleaned up.

    Mal.

  25. #25
    Senior Member
    Join Date
    Dec 2009
    Location
    SYD
    Posts
    564
    Quote Originally Posted by Dimal View Post
    Oh yuk...
    At least it can be cleaned up.
    Or repurposed as a boat mooring.

  26. #26
    Senior Member Yelta's Avatar
    Join Date
    Jun 2009
    Location
    Moonta SA.
    Posts
    6,866
    Quote Originally Posted by ekrabappel View Post
    Attachment 22812

    The pupae of the critters living under the stationary burr.
    I don't see the pics in posts 21 and 22, comes up with message "Invalid Attachment specified"
    level3ninja and IrisGanache like this.

  27. #27
    Super Moderator Javaphile's Avatar
    Join Date
    Dec 2004
    Location
    Earth!
    Posts
    15,582
    Quote Originally Posted by Yelta View Post
    I don't see the pics in posts 21 and 22, comes up with message "Invalid Attachment specified"
    Ditto.


    Java "Delete and re-attach" phile
    level3ninja likes this.
    Toys! I must have new toys!!!

  28. #28
    Senior Member Jackster's Avatar
    Join Date
    Nov 2017
    Location
    Maddington, Perth. Wa
    Posts
    976
    Not sure I want to see
    Dimal likes this.

  29. #29
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    File was 3.3MB so maybe it got rejected? Odd that it was showing for a while. Have resized.critters.jpg
    Not as clear though. Back to my original post, any ideas on how to remove the black ball from the shaft?

  30. #30
    Senior Member level3ninja's Avatar
    Join Date
    Nov 2013
    Location
    Sydney
    Posts
    1,463
    I would try a spanner on the nut and some rubber or something grippy on the ball with your hand

  31. #31
    Super Moderator Javaphile's Avatar
    Join Date
    Dec 2004
    Location
    Earth!
    Posts
    15,582
    Remembering it's likely a reverse thread.


    Java "Both the nut and the ball" phile
    Dimal likes this.
    Toys! I must have new toys!!!

  32. #32
    Senior Member level3ninja's Avatar
    Join Date
    Nov 2013
    Location
    Sydney
    Posts
    1,463
    Having another look in the shadow under the ball appears to be a square section. Is that part of the same piece as the nut or could you put a second spanner on that and separate them?

  33. #33
    Senior Member Jackster's Avatar
    Join Date
    Nov 2017
    Location
    Maddington, Perth. Wa
    Posts
    976
    I think the square section is part of the shaft. Surely the ball will pull off or unthread by hand.

  34. #34
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    Quote Originally Posted by level3ninja View Post
    I would try a spanner on the nut and some rubber or something grippy on the ball with your hand
    Trouble is the ball is just below the rim so hard to get a grip on it. On the previous MD6 thread I wonder if the square section came off with the nut?

  35. #35
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    Quote Originally Posted by level3ninja View Post
    Having another look in the shadow under the ball appears to be a square section. Is that part of the same piece as the nut or could you put a second spanner on that and separate them?
    It is hard to get any spanners on to them as they are sitting at the bottom the the well. That is why I suspect the ball must come off so a socket can go over the hex nut. But whether the ball and square section are permanently joined or whether the ball screws onto a thread arising from the square section, I have no idea.

  36. #36
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    Quote Originally Posted by Jackster View Post
    I think the square section is part of the shaft. Surely the ball will pull off or unthread by hand.
    Not to date. It needs some leverage as it has been 10 or even 20 years since it was last removed. Trouble is, once I apply leverage, I may break it if trying to unscrew the wrong piece.

  37. #37
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    Quote Originally Posted by Javaphile View Post
    Remembering it's likely a reverse thread.


    Java "Both the nut and the ball" phile
    Ah yes, that thought has crossed my mind. Another reason for my reluctance to apply leverage without knowing which way to turn it.

  38. #38
    Super Moderator Javaphile's Avatar
    Join Date
    Dec 2004
    Location
    Earth!
    Posts
    15,582
    Per its parts diagram it appears to be a separate part.


    Java "RTM to the rescue again" phile
    Dimal and Jackster like this.
    Toys! I must have new toys!!!

  39. #39
    Junior Member
    Join Date
    Jul 2019
    Posts
    18
    ball.jpg
    Update - finally remembered I had a pair of tongue and groove piers with leather glued over the business end. Carefully tried lefty loosie but seemed to shift a fraction and stiffen so I tried reverse thread undo and it worked. Surprisingly the ball seems permanently fixed to the shaft (unlike as shown on the parts diagram) and the shaft with the square sides at the bottom actually screws onto the motor shaft. Even more surprisingly, the hex nut that I thought would be the primary nut for holding the burr bracket on the motor shaft is just a spacer and has no thread.
    Have now removed the bottom plastic casing and noticed the critters have been dropping pupae and their own dead bodies all over the internal electrics (plus a few cockroach eggs to boost) so I won't sleep well until I have torn it down and cleaned it well. Will tackle some more this weekend.
    Dimal, Javaphile and level3ninja like this.

  40. #40
    Super Moderator Javaphile's Avatar
    Join Date
    Dec 2004
    Location
    Earth!
    Posts
    15,582
    Reality wins!


    Java "" phile
    Dimal likes this.
    Toys! I must have new toys!!!

  41. #41
    Senior Member Jackster's Avatar
    Join Date
    Nov 2017
    Location
    Maddington, Perth. Wa
    Posts
    976
    That would be living out in the garage..
    Might scrub up ok though. Good on you for having a go



Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •