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

1 Answer

Grinder will not turn off

When turning the grinder on to grind it will power one and grind. But, when I remove the filter from the doser it is still running. The power switch will not turn the machine off.

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It is possible that the relay, or the micro switches on the grinder are defective.

Posted on May 23, 2009

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Posted on Jan 02, 2017

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Tip

Rancilio Rocky w/ doser: clean sweep of coffee grounds


The Rancilio Rocky coffee grinder is a superb, highly recommended machine, but its doser is pretty useless in the home. First reason: you want to grind coffee instants before you brew or pull your espresso shot; otherwise, the grinds just lose aromatics and flavor. The doser only works for multiple doses, so you're better off just grinding the amount you need each time. If you're buying a Rocky, get the doserless model.

If you have the doser model, like I do, you also find that the vanes which sweep the coffee into your portafilter or cone leave a layer of grounds on the doser floor. If not cleaned out, they turn rancid. There are coffee web sites with fairly complicated instructions on how to modify the vanes to do a clean sweep. Here's the simple way:

Flip up the doser cover, and spin the vanes while pressing your finger lightly on the outer top edge of one vane. The vanes have enough play so the pressure brings one into light contact with the doser floor, sweeping 99% of the grounds into your waiting portafilter.

on Jan 03, 2011 | Rancilio Rocky Espresso Coffee Grinder -...

1 Answer

HOW DO I CHANGE THE GRINDING MECHANISM ON MY SPIDEM TREVI EXCLUSSIVE ESPRESSO MACHINE. I HEAR THE MACHINE GRINDING BUT IT'S REALLY NOT DOING ANYTHING. ANY SUGGESTIONS


When the grinder spins free and fast it only means that fresh beans are not feeding into the burrs. This happens when:
1- Grind setting is too fine and beans cannot enter the grinder mechanism.
2- Use of oily dark roast beans can clog the ground coffee chamber and preven the fresh beans entering the grinder.
3- The ground coffee chamber outlet is clogged due to oily beans or too fine coffee setting.

When you cleaned the grinder you may not have cleaned the coffee outlet to the doser on the left. You can clean the outlet to open the passage of coffee grounds to collect in the dosing device..
After cleaning the outlet, you should next make sure that coffee grounds are not packed in the doser. The doser is inside the door right above the brew group.
To access the doser:
1- Remove water tank.
2- Remove the brew group.
3- Lay the machine on its back for full view of the doser.
4- Pull the doser door open (it is like an Attic door.
5- Keep the doser door open and clean the inside with a brush. The outlet from the grinder is on the right side with a wire wiper cleaner that moves across the grinder outlet fills from the grinder. This opening.
Use a brush to clean the doser.
On the left of the doser space there is a plastic flap that is pushed to the left when coffee grounds fill the doser.
At certain distance push back (1/4") the notch on top of the flap pushes the doser micro switch pin to stop the grinder. Push the flap gently to the left to make sure that it is moving well. With each push back of the flap, one can hear the feeble click sound from the micro switch.
When the above cleaning is done, try the grinding.
If the conical burrs have not been replaced for over 2500 grinds, it is time to do so.

The above grinder and grinder doser cleaning instructions are available as download files on the following page link:

One can find many useful maintenance guides on one page.
Good luck.
http://www.partsguru.com/MaintenanceofEspressomachines.htm

Feb 10, 2015 | Spidem Coffee Makers & Espresso Machines

1 Answer

Our Saeco Vienna Superautomatica sounds like it's grinding beans but keeps running until the red 'bean' light comes on and we have to shut the machine off. Any suggestions?


The grinder is timing out and stops if the beans do not enter the grinder. This happens because:
1- The grinder outlet is clogged and fresh beans cannot pass through the burrs.
2- The grind setting is too fine and helping clogging in the grinding chamber or the ground coffee outlet.
3- Operator may have been using dark roast oily beans. Like it or not, the dark roast oily beans do not make stronger espresso. Please stop using such beans in fully automatic espresso machines.
4- The grinder has already made over 2000 grinds and the burrs are blunted and not grinding beans as needed.
To solve this malfunction, clean the grinder. Make sure the grinder outlet to the doser is cleaned. This outlet passage is about 2 inches or more. To clean it, lay the machine on its back (water tank side) to allow better view of cleaning the doser and the passage of coffee from the grinder to the doser. Use the link below to find instructions for cleaning the grinder and replace the burrs.
Gaggia Titanium and Plus Espresso machines parts and repairs Saeco...

Oct 18, 2014 | Coffee Makers & Espresso Machines

2 Answers

Why does no brewed coffee comes out? bypass preground does work


- coffee-channel is stuck.

check google for calibrating/cleaning your gaggia.

Aug 27, 2014 | Gaggia Titanium Espresso Machine

1 Answer

I have a mazzer luigi coffee grinder on which set is the best coffee you get


grinding setting is one simple operation but requires a bit patience:
1 turn on your grinder and continue setting to fine while burrs are spinning, you stop when you hear metal to metal touch sound(burrs maximally closed finest ginding) 2 from that point go back quarter of revolution and mark the spot where you stopped with marker to body of grinder and setting plate with one line 3 grind little amount of coffee only to fill one sector of dosser than test it at your machine(if it leaks too fast and with yellow color of cream you should go to more fine>><< if it does not leak from the filter holder or it leaks very slow you go to in opposite way. 4 you test grinding few times bit after each reset of plate grind little amount and take that in one other pot (that will provide to have pure new granulation) 5 after setting measure the grinded coffee that come out from doser it should be about 7 grams, better measurement you can get if you measure 10 doses in one place because you don't get never same amount from 6 sectors of doser.
PS: the pump pressure of coffee machine should be from 8 to 10 bar and steam pressure should be from 1.1 to 1.5 bar> depends on type of coffees you use.

Nov 14, 2010 | Mazzer Coffee-grinder SUPER JOLLY Electric

1 Answer

My Rocky is just out of the box yesterday and it seems to have jammed up. It still grinds, but I can't turn the top, at all. It is stuck, so I can't adjust the courseness. I can't see any obvious problem...


  1. stabilize the body of grinder
  2. provide block spin to be in release position
  3. get one 3 legged key for releasing oil filters
  4. put filter legs at upper holder of burrs
  5. start to release carefuly
be gentle at first, go forward and backwards to measure how much strength is required

Oct 31, 2010 | Rancilio Rocky SD Grinder without Doser -...

1 Answer

Hello. My Mazzer grinder doser Super Jolly (used


It could be that the switch failed, try this to check remove the top part or the grinder burrs and turn it on, if it turns then, grinder was jammed if not switch needs to be replaced.

Apr 11, 2010 | Mazzer Coffee-grinder SUPER JOLLY Electric

1 Answer

Grinder grinds but when I try to dose it won't turn inside to dose.


Doser lever failed. I diassembled the doser housing (three screws in the base) and found the return spring had fractured. I did not have any spring steel (such as a piece of clock spring) so I found it possible to cut a piece out of an old feeler gauge (38 thou) using tinsnips. I cut to the correct length and glued into the plastic housing as originally -just saved myself $100 and more importantly to me, all the pain of getting the grind setting correct on a replacement grinder

Nov 24, 2009 | Mazzer Coffee Makers & Espresso Machines

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

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