9
Motor
Location:
The motor is located in the upper wrapper under
the hopper.
Test Procedure:
1.
Remove the hole plug located on the right side
of the housing. Press the red “Reset” button vis-
ible through the opening. Listen carefully for a
“click”. This resets the motor protection circuit
and may indicate that something other than cof-
fee was inserted into the hopper for grinding.
If the grinder remains unable to start, proceed to
step 2.
If the grinder stops operating shortly after start-
ing, refer to the removal and replacement steps to
gain access-to the grind chamber. Remove any for-
eign materials that may be found.
2.
Disconnect the grinder from the power supply.
3.
Remove the electrical access panel at the rear of
the motor.
4.
Check the voltage across terminals L1 & L2 of
the motor with a voltmeter when the Off/On/Start
switch is placed in the “START” (right) position
and released. Connect the grinder to the power
supply. The indication must be:
(a) 120 volts ac for two wire 120 volt models.
(b) 240 volts ac for two wire 240 volt models.
5.
Disconnect the grinder from the power supply.
If voltage is present as described and the grinder
remains unable to start, replace the motor.
If voltage is not present as described, refer to the
Wiring Diagrams, and check the grinder wiring har-
ness.
Removal and Replacement - MOTOR
1.
Remove all wires from the Off/On/Start switch,
motor, and motor mounting plate.
2.
The entire wiring harness must be fed into the
bottom of the grinder housing through the hole
in the motor mounting plate.
3.
Remove both 6-32 screws beneath the upper
front inspection panel.
4.
Remove the six 10-32, hex head screws on top
of the motor mounting plate.
5.
Slowly slide the assembly out the rear of the
grinder housing. The mounting plate will have to
be raised to gain clearance for the motor hard-
ware and wiring harness bushing.
6.
Remove the four 5/16"-18 bolts and nuts to sepa-
rate the motor from the mounting plate.
7.
Mount the new motor and tighten the four bolts
and nuts. They should be tightened approxi-
mately one full turn past snug.
8.
Slide the motor mounting plate into the rear of
the grinder housing.
9.
Feed the wiring harness into the top of the hous-
ing through the hole in the motor plate.
10. Reinstall the six 10-32 hex head screws through
the motor plate and the two 6-32 screws through
the housing.
11. Reattach the green wire to the 10-32 stud on the
motor mounting plate.
12. Refer to the
Off/On/Start switch section when
reconnecting the switch wires.
13. Refer to the illustration below when reconnect-
ing the motor wires.
WHI/BLU to Relay N.O.
WHI to Cordset (120 v)
RED/BLK to Cordset (240 v)
GRN to Chassis Ground
SERVICE (cont.)
PERSO
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INJ
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HAZARD
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CA
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11191.0001
CO
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CLEAN GRIND C
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P1309
P1310
10171 121597