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S
ERVING THE
W
HOLE
-B
EAN
C
OFFEE
M
ARKET
S
INCE
1968 [email protected]
Page 2 of 4
As you perform the following steps, watch for clues as to the cause of your problem.
a. Clear out all ground coffee packed in the discharge tube by inserting a wooden pencil
in the opening and gently stirring it. If the discharge tube is full of coffee, you
obstructed the flow of ground coffee by having a coffee bag smaller than the amount of
coffee being ground. Use a larger bag and be sure the grounds are being packed to
the bottom of the bag by tapping on the bag while grinding the last 3
rd
of the beans.
b.
Do not lift the hopper (funnel) while it contains coffee beans
.
c. Remove the coffee beans from the hopper, using a vacuum cleaner if necessary.
d. Remove the 4 corner screws holding the lid/cover assembly and remove it with the
hopper.
i.
On 804 model grinders
, loosen the right rear STOP lock.
ii. Hold the hopper assembly, twist it 30° counter-clockwise and lift.
e. Dismantle the stationary disc flange by removing the 4 cheese head screws. Pull out
the stationary disc and set it aside. If the stationary disc does not come out easily, tap
the circumference where the bolts are located with the handle of your screwdriver. This
should loosen any coffee grinds that may be wedged between the disc and the
grinding housing.
f. Check whether the lower grinding disc (on the rotating plate) is spinning freely. (Use a
socket wrench on the center bolt of the rotating plate to turn it easier). If the rotating
plate does not turn freely, your problem is a frozen bearing or a bad felt seal around
the rotating plate that needs to be changed. This could be caused by extended use of
flavored coffee.
g. As you turn the rotating plate, see if the wings along its circumference are wiping all
the coffee out of the exit hole. Is there a thick layer of coffee along the outer wall of the
grinding area? An easy measurement of the rotating plate is to use 3 standard-size
business cards:
i. Clean away the coffee between the end of each wing and the outer wall.
ii. Check if you can fit the 3 business cards between each wing and the wall. You
should have to push the cards into place. If they slide in easily or if you can fit
more than 3 cards in between any of the wings and the outer wall, the rotating
plate is worn and should be changed to avoid further clogging.
h. Clear the obstruction in the exit hole towards the discharge housing with a small
screwdriver or pencil. Be careful not to dislodge the rubber transition tube. The
transition tube between the grinding chamber and the discharge tube must be perfectly
round. Any crimp or tear in the tube will result in clogging.
i. If the discharge tube was not full, nor was the inside edge of the grinding chamber
around the rotating plate’s wings, then the clogging was due to a foreign particle in the
grinding chamber or worn out grinding discs. If you cannot find foreign matter and
everything else looks good, you need to change the grinding discs.
To reassemble the grinder, see Paragraph 4 on the following page.
