Question about Bunn -o-Matic G3 (3 lb. Commercial Coffee Grinder)

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I have an 10 year old bunn 3g coffee grinder. I was wondering how I could clean and service and adjust the burrs.

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You will need a manual that has all the instructions for your machine, as this is too long a subject to answer here. The manual for your machine can be found at: http://www.bunn.com/pages/techdocs/manuals/grind.html

Posted on Feb 13, 2009

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1 Answer

I took off the grind settings knob on my Bunn G2 grinder... and now it won't grind!


oooooooooppppppppppsssssssssssssssss
you should not do this

the knob keeps two burrs together .The knob forces the screw (when you turn for grinding quality).
and adjust burrs far and close as needed
.reinstall it and turn the knob to the right until you feel tightness.Then,turn to the left 3 turns. and then adjust the grinding quality whatever you like .
thanks
please rate my work

Apr 27, 2011 | Bunn -o-Matic G2 (2 lb. Commercial Coffee...

1 Answer

I have a bunn coffee grinder that keeps on jamming up everytime you put coffee beans in it. I took the front part off to clean it out every time it jams,but it keeps on doing the same thing. The model bunn...


It sounds as though your grind is out of adjustment. The grinder is probably set too fine. I have not worked on a G3 grinder but I would think it is like the Bunn G2. On the front knob you will find 2 small set screws and one larger adjustment screw (in the middle of the knob)
1. Set the selector knob to finest setting (Espresso or Turkish)
2. Loosen the 2 set screws about 2 turns.
3. Activate the start switch (you must activate the "bag switch" behind the chute)
4. With the grinder running, SLOWLY turn the center screw clockwise only until you hear a very slight whirring sound (this is the burrs touching).
5. Then, back off the center screw counter-clockwise about 1/8 of a turn, shut off grinder and re-tighten the set screws.
Check the grind in the "drip" setting by running a few beans through... the grounds should be about the consistency of sand. You should get a better flow through the machine with the grind adjusted properly. You may want to check the cleanliness of the hopper in the top... I have seen these dirty enough to impede the falling of the beans to the grinder.
Also, whenever you remove (for cleaning) the 2 larger screws that hold on the front "plate", be sure to put them back in evenly... kind of like one would with a wheel on a car- Finger-tight then slightly tighten each on a little at a time (back and forth) until tight.
Hope this helps.

Oct 15, 2010 | Bunn Coffee Grinder

1 Answer

How to calibrate my Bunn grinder.


It would be easier to pick up the manual in the commercial section under products from bunn.com, rather than me explaining it.
You have to loosen the nut on the adjustment wheel, then pull out slightly and turn towards coarse a few numbers, then push back in and turn grinder on and slowly turn toward fine, until the burrs slightly touch, you will hear a little metal on metal, at that point turn the grinder off, back off about slightly, then pull out adjuster and turn it to Turkish and tighten screw.

Mar 13, 2010 | Bunn -o-Matic G3 (3 lb. Commercial Coffee...

1 Answer

Oily beans seem to have clogged our coffee grinder up. What can we do?


Rotate the bean hopper counter clockwise until it stops. Lift it off. Remove the outer burr with the 2 wings and clean under the burr. Clean the opening going to the chute for ground coffee(inside where the burr was).
Install the outer burr. Install the bean hopper. Rotate the bean hopper to the French press grind (coarsest) and operate the grinder. This will clean the burrs and the passages. If it starts to clog, repeat the last part to clean the burrs and passage. It must be grinding to go to a finer setting, but you can go to a coarser setting any time. Another thing. Turn the grinder upside down (empty) and rotate the bean hopper back and forth to clean the threads of the adjusting burr..

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1 Answer

Mini mazzer grind doesnt adjust


Can the silver collar turn? If yes then adjust, clean out all the grounds then grind for 3 secs, clean grounds then 10 secs(that will give you about 12-16 grams for a test shot). The 3 secs grind and clean is for the coffee that is already ground with the previous setting, there is still a small amount between the burrs and the chute.

Jun 28, 2009 | Mazzer Mini Burr Coffee Grinder with Timer...

1 Answer

Severe clogging


Try using long grain white rice works better than minute rise, if that does not help, then the burrs need to be replaced on grinder.

May 12, 2009 | Breville Conical Burr Coffee Grinder -...

1 Answer

My Bunn Grinder sounds like it is jammed. I have power but no mov


First turn grinder to coarse setting and try grinding some white rice through it, that will clean out the coffee oils, if that does not work then the you will have to open the grinder and clean out the burr chamber and the spout for the grounds.

Apr 21, 2009 | Bunn Coffee Grinder

1 Answer

Ginding problems, all clogged up


Follow these instructions to put grinder back together...

Items needed to clean grinder
1- #2 Phillips head screw driver
1 Cleaning brush
Prep:
Remove all beans from the bean hopper, vacuum out any
beans that cannot be scooped out by hand.
Remove the front and back screws and pull off bean hopper
container from the machine. (Note: The rear screw is longer
than the front screw.)
Note: Doser adjustment knob is available only on Vienna
Digital and Vienna Deluxe Rapid Steam.
Place screws in a safe place so that they will not be lost.
Cleaning the Grinder Viennas
back screw
front screw
grinder
knob
doser
knob
Before beginning to clean the grinder please be sure to turn the machine off and unplug it from the wall
socket. Grinder Tip: Using an oily bean will cause the coffee to build up quickly and clog the grinder.
Saeco recommends using a medium to dark colored bean that is not oily.
After cleaning the grinder and then brewing a cup of coffee it may take 2-3 grinding cycles for the machine
to dispense coffee.
Step 1:
Remove the black rubber gasket, then vacuum additional beans or grinds from the grinder area (Fig. 1).
Rotate the outer ring of the grinder counter-clockwise until the red line is at the 12 o'clock position (as
viewed from the front of the machine) or until the red line on the outer ring is 180º from the opposite red
line on inner burr ring (Fig. 2).
Lift the inner burr ring out of the assembly (Fig. 3).
Figure 1 Figure 2 Figure 3
Step 2:
Vacuum out any residual grinds from inside the grinder and clean the grinder burrs using the cleaning
brush (Fig. 5). Clean out the grinder coffee chute using the end of the cleaning brush (Fig. 5).
Remove the drip tray, open the service door, remove the dregdrawer and brew group. Gently pull
down the coffee doser door and brush out any ground coffee that may be inside the chute (Fig. 6).
Reassembly:
Be sure that the red line on the outer ring is still in the 12 o'clock position. Place the inner burr ring back
into the grinder making sure the red line on the inner burr is at the 6 o'clock position or 180º opposite from
the red line on the outer ring (Fig. 2). Once the inner burr ring is in place, rotate the outer ring clockwise
until it will not turn any further. At this time the two red lines should be aligned. The grinder is now at the
"0" position. Replace black round rubber gasket (Fig. 7).
Take the bean hopper container and rotate the grinder adjustment wheel to zero (0) (Fig. 8) and the doser
adjustment knob to the minus symbol (-) (Fig. 9). Slide the doser adjustment gear toward the left of the
machine until it stops. (Note: The Vienna Black does not have a doser adjustment knob. Only the Vienna
Digital & Vienna Deluxe Rapid Steam have a doser adjustment wheel.)
Reinstall the bean hopper container being sure to use the LONG screw in the back, then replace the finger
guard using the short screw in the front of the container. Once the bean hopper container has been
reinstalled, rotate each knob through the full range of motion. The grinder knob should rotate from (0) to
(18) and back, and the doser knob from the minus symbol (-) to plus symbol (+) and back.
Place the grinder adjustment knob at the eight (8) position and place the doser knob at the halfway
point between the plus symbol (+) and the minus symbol (-) symbol, or to your preferred settings.
For questions or concerns please contact Saeco Customer Service
at 800.933.7876 or email at support@saeco-usa.com.
Figure 4 Figure 5 Figure 6
Figure 7 Figure 8 Figure 9

Jan 12, 2009 | Saeco Vienna De Luxe Espresso Machine

1 Answer

Bunn G2 is caked and I need to remove burr gear


For this job, you will need detailed instructions. You can download a use and cleaning manual for this Grinder at this adress: http://www.bunn.com/pages/techdocs/manuals/grind.html

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