Bunn Ultra NX Service & Repair Manual page 34

Auger Motors
FIG. 9 AUGER MOTOR
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: BUNN recommends the flats on the front
of the shaft that engage the auger nose are set
to a horizontal position, the pins will not be in
the torque sensor board before removal of the
motor assembly.
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 sensors.
5. If the replacement motor does not have the
mounting bracket, transfer original bracket/
screws from defective motor over to the
replacement motor by removing the 3 screws
securing the bracket to the motor gear box.
NOTE: Before install of new motor assembly,
ensure a small amount of Krytox grease
(M2548.1000) is present on the torsion spring
bearing that will engage the auger shaft torsion
springs.
7. Being careful, install replacement motor with
bracket, engaging the motor shaft into the auger
shaft torsion springs.
SERVICE - REAR COVER COMPONENTS
8. Reinstall the 3 nuts that secure the motor
mounting bracket to the chassis.
9. Reconnect the auger motor 4-pin connector to
the machine wiring harness.
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