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Thread: Rancilio MD 50 refurbishment

  1. #1
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    Rancilio MD 50 refurbishment

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I posted some pics of the new vs old burrs for this and promised to post more detailed pics so here it is.

    I bought this grinder from an auction a little while ago. There was nothing wrong with it, it was just dirty and looked like it hadnít been cleaned in a while. The paint was all chipped and the stainless body looked like it could do with a bit of a polish. In the end I decided to strip it, polish the stainless and repaint the body. I took a heap of photos as I pulled it apart and reassembled it so I thought I would post them up for those who are interested. I myself find these posts interesting. I like to look at what others have done and find I get something out of the posts. So I thought I would post up what I did. Also I couldnt find a lot on the net about this grinder. I believe it is still sold and from what I had seen from the photos on the net there doesnt appear to be much that has changed. Mine is a 1997 model.

    original grinder



  2. #2
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    Re: Rancilio MD 50 refurbishment

    sideon




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    Re: Rancilio MD 50 refurbishment

    The grinder was pretty filthy, to me it was quite a bad build up of old coffee on everything. To follow are a few photos of various dirty parts.



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    Re: Rancilio MD 50 refurbishment

    Picture of the top minus the hopper. Two of the bolts were missing. It seemed the previous owner had somehow managed to snap them off. These were used to locate the hopper onto the top of the grinder. They are threaded internally and I think the hopper was screwed to these. However any bolts that may have existed were missing and the hopper was just sitting there. I didnt bother to replace them as it sits there ok and doesnt seem to move around. I managed to get the broken threads out. Once I disassembled the grinder I got my dremel in behind and cut a slot in the bolt from behind. That then enabled me to get a flat blade screwdriver onto them and unscrew them from underneath.

    The grinder isnít stepless as the smaller wheel is stepped and is locked via the pushdown button seen in the next photo. However for all intents and purposes it is stepless as the adjustments are fairly small.


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    Re: Rancilio MD 50 refurbishment

    Another photo of the grinder collar and adjuster. The hopper feeds into this collar bit. This bit was all gummed up with old coffee oils. Took a couple of soakings in coffee machine cleaner and hot water to shift this.


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    Re: Rancilio MD 50 refurbishment

    another


  7. #7
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    Re: Rancilio MD 50 refurbishment

    Photo of the spinning burr and grinder chamber. *All those loose looking grinds were actually sitting on top of coffee oil gum. *It all broke off in pieces.

    the previous pics were of the static burr.



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    Re: Rancilio MD 50 refurbishment

    Photo of inside the doser. The spindle was also pretty dirty with a nice build up. The ali box at the top was the auto shut off. This grinder is automatic. Every 6 pulls on the handle and it turns itself on. That box is the auto shut off. Once the grinds build up the black paddle is pushed back and it engages the switch in the next photo and turns the grinder off.


  9. #9
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    Re: Rancilio MD 50 refurbishment

    top switch




  10. #10
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    Re: Rancilio MD 50 refurbishment

    more photos of the doser internals



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    Re: Rancilio MD 50 refurbishment

    another


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    Re: Rancilio MD 50 refurbishment

    another

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    Re: Rancilio MD 50 refurbishment

    another


  14. #14
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    Re: Rancilio MD 50 refurbishment

    Some photos of the underside of the doser. You can see the mechanism for the counter and the auto on switch.


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    Re: Rancilio MD 50 refurbishment

    another


  16. #16
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    Re: Rancilio MD 50 refurbishment

    counter


  17. #17
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    Re: Rancilio MD 50 refurbishment

    bottom of the the grinder with the base plate removed. there is a bit of a mass of wires here


  18. #18
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    Re: Rancilio MD 50 refurbishment

    wrong button again


  19. #19
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    Re: Rancilio MD 50 refurbishment

    motor removed, its big and heavy. the body is pretty much all motor




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    Re: Rancilio MD 50 refurbishment

    closeup


  21. #21
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    Re: Rancilio MD 50 refurbishment

    reassembly commenced

    teh ali piece runs from the grinder burr chamber to the doser. It is quite long and was really gummed up when I disassembled it. I used food grade silicon to seal it.


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    Re: Rancilio MD 50 refurbishment

    motor attached

    The threaded rod is pretty much how it is all held together. The base screws to the top of the rods and holds the stainless sides in place. Similarly the doser is all really held together by the stainless rods you see.


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    Re: Rancilio MD 50 refurbishment

    doser going back on

    The doser was a real PIA to remove. The bolts that attach to the rod in previous photo are really difficult to get out. I didnt get a pict of the bolts, but they are really close to the side of the doser body so you cant get a socket onto them. The only way I could get them off was to use a 10mm open ended ring spanner and put a crescent and put that on top of the bolt and use a crescent to twist the spanner as in photo. Itís not that clear, but if you need to get it off you should understand what I mean.


  24. #24
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    Re: Rancilio MD 50 refurbishment

    doser assembled

  25. #25
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    Re: Rancilio MD 50 refurbishment

    forgot pict


  26. #26
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    Re: Rancilio MD 50 refurbishment

    couple more progress picts



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    Re: Rancilio MD 50 refurbishment

    another


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    Re: Rancilio MD 50 refurbishment

    another



  29. #29
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    Re: Rancilio MD 50 refurbishment

    Finished unit. There are two switches. Black one is main power switch. When that is on grinder will run once handle goes around 6 times and will auto shut off when doser is full. Orange switch will make it grind and it will again grind until doser is full.


  30. #30
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    Re: Rancilio MD 50 refurbishment

    Another finished photo. I hadnít quite finished here. I was still in the process of finishing the hopper with a plastic polish to eliminate the haze and remove some of the scratches. I had already done the doser screen. The hopper came up quite well once I had finished. There were still a few scratches though as it was scratched fairly deep, but I got rid of the haze and made it all glassy smooth.

    I had a blanket on the bench so I wouldnt scratch the paint (if you were wondering)


  31. #31
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    Re: Rancilio MD 50 refurbishment

    The stainless sides got a quick buffing on the bench grinder which brought them up quite well. I much prefer the black and chrome look to the original grey.


  32. #32
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    Re: Rancilio MD 50 refurbishment

    Nice job Clinto, it looks great all cleaned up and shiney! [smiley=thumbup.gif] [smiley=smiley.gif]


    Java "Hhhhmmm.....Shiney bits!" phile

  33. #33
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    Re: Rancilio MD 50 refurbishment

    Yeah, too right Clinto......

    Absolutely a top job [smiley=vrolijk_26.gif] and definitely a grinder to last the ages ;),

    Mal.

  34. #34
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    Re: Rancilio MD 50 refurbishment

    thanks guys

    yeh its a solid beast, with a big torquey motor. the original feet for it were all split so I ended up binning them. I was running it for a bit on the bench without any feet and it would cause the grinder to spin about 50mm every time you flicked it on.

    good way to get hold of a cheap grinder. I bought it at auction and had to replace burrs and feet so all up less than $220.

  35. #35
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    Re: Rancilio MD 50 refurbishment

    Quote Originally Posted by Clinto link=1163122347/30#33 date=1163135444
    good way to get hold of a cheap grinder. I bought it at auction and had to replace burrs and feet so all up less than $220.
    Yes Clinto,

    And even if it has had a hard life, its so solidly built that any ongoing maintenance that may be required into the future is not likely to cost an arm and a leg either. The motor bearings can probably be easily replaced if and when that needs doing, with readily available standard sizes..... the occasional clean out, etc to make sure the motor cooling channels/galleries are kept open. From looking at your photos of the Dosing mechanism, its so oversized for the job that I doubt this will ever wear out. All in all its one terrific grinder mate 8-). All the best.....

    Mal.

  36. #36
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    Re: Rancilio MD 50 refurbishment

    I just picked one of these up, sent you a PM about refurbishing it.

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    Re: Rancilio MD 50 refurbishment

    Thanks a ton for posting this. I just have a couple of questions. I have it ripped apart for the most part minus the hopper and the motor.

    How in the world did you get the motor off? What type of paint did you use? Did you strip the old paint off first?

    Thanks again.
    ~eric



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