Bunn Ultra NX Service & Repair Manual page 37

Torque Sensor Circuit Board
FIG. 15 CBA POSITION/TORQUE
SENSOR
Part Removal and Replacement:
1. Disconnect the dispenser from the power
source.
2. Locate the auger motor 4-pin connector,
push-in the connector tab to release connector
from the machine wiring harness.
NOTE: When removing or installing the motor
be sure the split pin in the motor shaft is turned
to a position that will clear the torque sensor
circuit board.
3. Use a 7/16" nut driver or deep well socket to
remove the 3 nuts securing the auger motor
bracket to the chassis.
4. Grab the auger motor with mounting bracket
and begin pulling motor away from auger shaft
being careful that the motor .188 pin clears the
board sensor.
5. Remove 1 screw and washer holding torque
sensor circuit board into drum housing slot.
6. Gently remove torque sensor board from drum
housing slots. See FIG. 15.
7. Disconnect 3-pin wire harness connector from
the torque sensor board and discard.
8. Reconnect machine wiring 3-pin connector onto
replacement torque sensor circuit board.
9. Install replacement torque sensor into drum
housing slots and secure with 1 screw and
washer from step 5.
10. Being careful, reinstall auger motor with bracket,
engaging the motor shaft into the auger shaft
torsion springs.
SERVICE - REAR COVER COMPONENTS
11. Reinstall the 3 nuts that secure the motor
mounting bracket to the chassis.
12. Reconnect the auger motor 4-pin connector to
the machine wiring harness.
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