HomeRoast Digest

Topic: GINO ROSSI RR45 grinder: how do i clean it???? (5 msgs / 145 lines)
1) From: deerslammer
I just picked up a rossi rr45 grinder at the thrift shop for $35.. the hopper is cracked and its very dirty. it runs and is very quiet for such a large machine. anyone know how i might take this beast apart to clean it? also what do i look at on the burrs to see if they need replacing? or do i tell by the grind ? it must have been my day because i also found a zassenhaus 156 in great shape for $18. it looks to be a knee mill.
?? thanks in advance
??? dave in pa.
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2) From: Barry Luterman
All my thrift shop has are old Mr. Coffees. I guess there are no estate
donations here. All the true coffee drinkers are still alive. Another proof
that coffee is our friend
On Feb 19, 2008 12:29 PM,  wrote:
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3) From: Paul Helbert
Around here you'd usually have to put parts from four or five thrift shops
together to get one working  Mr. Coffee.
I did score a Z&D roaster for cheap late last year, which only needed
cleaning. I had fun with it for a month or so, then sold it on eBay. Had to
get back to basics.
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4) From: miKe mcKoffee
Used commercial grinder from thrift store, order new burrs, end of story. 
Kona Kurmudgeon miKe mcKoffee
URL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must
first not know. And in knowing know I know not. Each Personal enlightenment
found exploring the many divergent foot steps of Those who have gone before.
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5) From: Allon Stern
On Feb 19, 2008, at 8:02 PM, miKe mcKoffee wrote:
I agree. They're easily available, as are a bunch of other RR45 parts.
The RR45 is what I have. I just replaced the burrs on it.
You don't need to worry about the hopper, at least for now. I  
actually removed the hopper from mine; more on that further down.
Press down the regulator button to the left of the regulator ring -  
that's the thing that you turn to adjust the grind. Then turn the  
ring counterclockwise until it comes out. Careful when you let go of  
the button - mine doesn't have a retainer and will cheerfully shoot  
up in the air if you let it go quickly.
The burrs are held in place by three screws each. Remove the burrs.
There will be crud - oh yes there will be crud. You'll probably have  
to pry the burrs out of the crud.
Scrape with a nylon tool, such as a spudger, if you have one. Get a  
stiff nylon brush to help out. Keep at it. Can you see brass? Good.  
Keep going till the crud is gone.
The lower burr sits on a carrier that has three arms which sweep the  
grinds out of the of the grinding chamber. These will also have crud  
built up on them. Scrape their tops too.
There is a big nut in the middle of the lower burr carrier. Don't  
mess with it. I tried to remove the lower burr carrier to clean under  
it and I could not get it off - you have to be careful not to  
misalign the carrier. I hope I didn't.
The threads on the adjuster will need lots of brushing, as will the  
threads they mate with. You might practically have to "chase" the  
Dismantle the doser star. It probably won't be as sludgy as the  
grinder section, but you should clean it as much as you can. The  
center of the doser unscrews and lifts out, along with the upper star  
and a metal plate that separates the upper and lower stars. Then  
carefully remove the C-clip at the top of the spindle to remove the  
lower section. You shouldn't have to dismantle more than that to do a  
really thorough job.
Note that newer RR45s have fancy automatic shut-offs with magnetic  
sensors and all that stuff. You don't need any of that, but most of  
the other parts should be interchangeable.
Don't bother getting a built-in tamper.
I bought the grinds tray and portafilter fork for my grinder, but my  
home espresso portafilter doesn't fit with it installed. Oh well,  
I'll keep 'em for when I get a REAL espresso machine.
Anyway, if you want to remove the fork, or if you want to install one  
to replace a broken off one, you have to open the bottom. PULL the  
feet off - they're just friction fit - and undo the screws in the  
bottom. Then you should be able to see the screw that secures the  
fork. Needless to say, do this with the unit unplugged, m'kay?
Alright, now to the hopper....
If you're gonna be going through 2lbs of beans a day, then by all  
means get a new hopper.
Otherwise, it's one more thing to clean.
I leave the hopper off. I have a tamper that has a back end that fits  
inside the throat of the grinder, but rests on protrusions from the  
upper burr assembly which keep it from actually touching any moving  
parts. I know that if I put enough beans in to cover the visible  
metal parts inside the throat, that's just enough for a double shot  
of espresso. Then I put the tamper on top and grind. Finish with a  
pastry brush to get the last bits in, and sweep out the doser.
The doser is useless for home espresso. Again, another thing to keep  
clean but it isn't too bad to sweep out with a brush each use.
FWIW, the funnel from the aeropress fits nicely in the top of the  
grinder :)
Others on the list are fond of canning funnels.
Oh, and watch your fingers.
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