875
Grindmaster Corporation
800 Series Coffee Grinders
Operation and Instruction Manual
for
Models 810, 835, 875 and 890
Table of Contents
Installation ....................................................2
Operating Instructions ..............................2-3
Grind Adjustment ..........................................3
Shear Disc Replacement..............................4
Cleaning Instructions ....................................4
Lubrication ....................................................4
Troubleshooting Guide ................................5
Exploded View ..........................................6-7
Wiring Diagrams ..........................................8
Grindmaster Corporation
4003 Collins Lane
Louisville, Kentucky 40245 USA
(800) 695-4500 (USA & Canada only)
(502) 425-4776
FAX: (502) 425-4664
www.grindmaster.com
© Grindmaster Corporation, 1995
PRINTED IN USA
0105 FORM# GR-380-13
Part# 83427
Prior authorization must be obtained from
Grindmaster Corporation for all warranty claims.
Model 890
Page 2 Grindmaster Corporation 800 Series Coffee Grinders
Installation Instructions
1. Please read this manual before operating the grinder.
2. Carefully remove grinder from carton.
3. Place grinder in position on shelf, counter or other flat surface.
4. Plug grinder into standard electric outlet. Avoid using an extension cord.
5. Grind a small amount of whole bean coffee following operating instructions as described in this manual.
6. If there is any problem, consult the Troubleshooting Guide in this manual, (also on back of grinder.)
7. If you still cannot correct a problem, call Grindmaster’s Service Department for help, (800) 568-5715 M-F
8 AM - 6 PM EST
.
Operating Instructions
Your new coffee grinder is easy to operate and maintain. Before you place it in service, please have all personnel
familiarize themselves with these instructions; then see that this manual is kept in a convenient place where it will
always be available for ready reference.
How to Operate
1. Turn the selector knob to the desired grind setting.
2. Fill the hopper with the desired type and amount of whole bean coffee. Close the lid.
3. Place the bag underneath the spout.
4. Press the start button. *810 model - Press the grinder switch to the ON position.
5. The grinder will automatically stop when the bag is removed.**
* 810 model - Once coffee is ground, press the grinder switch to the OFF position or grinder will
continuously run.
** On models 835 and 875 the STOP button may be pressed after the grinder has completed grinding.
6. Remove bag from coffee spout once coffee is ground.
Grinds
Before shipment, your grinder is adjusted to accurately grind for each brewing method indicated. The Grinding
Burrs are made of an extremely hard and wear resistant alloy. From time to time grind adjustments (see Grind
Adjustment section in this manual) may be necessary as the burrs wear. If the grind runs coarser than expected
after normal adjustment and the grind time has increased , the burrs may have excess wear and should be
replaced. The burrs are warranted for (3) years or 30,000 pounds of coffee. Ask for a copy of our complete
Warranty for details. New burrs should always be installed as a pair, never one or the other, as they are accurately ground and lapped in pairs.
Circuit Breaker
This grinder is equipped with a circuit breaker to protect the motor from overloading. When the circuit breaker
operates, the reset button will pop out approximately 1/4" which then cuts off power to the grinder. The reset
button is located on the front panel of the Model 810, 835 and 875. To reset the circuit breaker, push in the
reset button. You will hear a click as it resets. If the grinder does not operate after resetting the circuit breaker,
there may be an obstruction in the grinding mechanism that is stalling the motor. Turn the grind selector knob
all the way to the left. Try restarting the grinder. If the circuit breaker “trips” again, the obstruction was not able
to pass. In this case, the Grinder Head should be cleaned out as described in the Shear Disc Replacement section of this manual.
Current
It is essential that full voltage and amperage always be available as it takes full power to grind coffee. NEVER
connect to an overloaded line or a two or three way plug, otherwise serious damage to the motor will occur. DO
NOT USE AN EXTENSION CORD.
Grindmaster Corporation 800 Series Coffee Grinders Page 3
Protection
The grinder is equipped with both a circuit breaker and a shear disc release to protect the motor and burrs
if a foreign object, such as a nail or rock, gets into the the coffee.
Grind Adjustment
Tools required: Large blade and medium Phillips head screwdrivers
In order to adjust the grind, follow these steps (Refer to
figure A):
1. Remove all coffee from the hopper.
2. Set selector knob to the finest setting (Espresso or Turkish)
depending on the model.
3. Loosen both knob retainer screws in selector knob one turn only.
4. While pressing the bag switch, located behind the spout, press the
START button so that the grinder will run during adjustment.
810 model - Press the ON or START button so that the grinder will
run during adjustment.
5. With the grinder still running, turn the adjusting screw in the center of the selector
knob slowly to the right until a slight clicking noise is heard. Immediately turn the adjusting screw to the left
one grind setting. This is the finest grind obtainable.
6. Tighten both of the knob retainer screws. Once the ESPRESSO grind has been set (Turkish for Model 835,
875, 890), the other grind settings will automatically set correctly.
7. Press the STOP or OFF button.
IMPORTANT: Always be sure the grinding burrs are not touching while the machine is running on the
ESPRESSO/TURKISH setting. Otherwise serious damage to the motor may result.
Shear Disc Replacement
If the motor should run and no coffee is dispensed, the shear disc release may have operated. Should this
occur, perform the following operations in the sequence given (Refer to Figure B on page 4).
Note: See appropriate Exploded View for part numbers.
Tools Required: Flat Blade Screwdriver and Pliers
1. Unplug machine.
2. Remove all of the coffee beans from the hopper.
3. Remove the Grind Cap by taking out the 2 Cap Screws.
4. Pull out the Revolving Burr and Feedworm Assembly. Clean out the Grind Head, removing all coffee
particles from inside the Grind Head and the Grind Cap so that it can be reset properly.
5. Check that no obstruction has been caught on the surface of the teeth of either burr. Remove the Shear
Cap and broken pieces of the Shear Disc. You are now ready to reassemble the grinder mechanism.
6. Slide the Revolving Burr and Feedworm Assembly onto the Drive Shaft. Insert the shear drive so that the
Motor Shaft tongue engages into the shear drive notch.
7. Insert a new Shear Disc by aligning the slot in the Shear Drive with the slot in the hub of the feedworm.
8. Replace the Shear Cap and Grind Cap. Make certain that the Grind Cap is screwed on tight and is seated
properly, not cocked, against the head. Without a proper seat, a proper grind cannot be obtained.
9. Your grinder is now ready to grind.
Figure A
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