Left & Right Auger Shaft Assembly - Bunn Ultra NX Service & Repair Manual

Left and Right Auger Shaft Assembly
Auger Shaft
Assembly
FIG. 26 AUGER SHAFT ASSY
Location:
The Auger Shaft Assembly is located in each of the
cooling drums.
Rear Cover Removal:
1. Remove 4 screws securing rear cover.
2. Grab cover and pull away from machine.
Test Procedures:
NOTE: The condition of the auger shaft torsion
springs can be viewed by utilizing the machine
software
informational screen called "Display Temp & Torque"
menu. Torsion springs can become weak or damaged
because of improper mixing of product or
become weak over a long period of usage/operation.
The left or right number on the screen is a real
time operation number (torque) related to the
"Thickness" setting multiplied by three during
normal auger load(slushy product or chilled
product) auger rotation or no load (empty hopper)
auger rotation.
1. Enter the software program and press the
"Right DOT" switch to answer "Yes" under the
"Daily Operations" menu.
2. Press the "Center Dot" switch to advance to
"Set Thickness" menu.
3. Press the "Right Dot" switch to enter "Left
Thickness" setting menu. Record left thickness
setting number. Press "Center Dot: advance
onto "Right Thickness" setting menu. Record
right thickness setting number.
SERVICE - REAR COVER COMPONENTS
4. Exit software program.
5. Press and hold "Left & Right Dot" simultaneously
for 5 seconds to enter the "Display Temp &
Torque" screen. See FIG. A.
NOTE: The informational screens will
automatically toggle back and forth.
6. The left and right torque number will be
displayed in real time during auger rotation.
The auger can be under no load (empty) or
under load (rotating slush) in the hopper.
See FIG. B.
7. If the left or right hopper is empty and techni-
cian presses the user panel left auger button to
turn on the left auger (rotation), the thickness
number recorded in step 3 multiplied by 3 is the
number that will be represented on the top left
line of the display. The number will count down
during auger rotation and should achieve zero
on the display.
If the auger torque number does not achieve
zero (0) during auger no load rotation and stops
at a relative higher number than zero, like 6,
that is an indication of possible weak torsion
springs within the auger shaft.
8. If the left and right hopper are rotating slush
product, the technician can view the left & right
torque number in real time to see if the product
is still refrigerating to achieve product
"Thickness" setting for that side.
Example: Right Thickness is set at 10.
10 x 3 = 30
The right refrigerant valve Off point will be 30
plus 1.
The torque/load number will increase until
31 has been reached, product is ready for
consumption.
I
10:45:30 AM
O
off
press & hold
FIG. A DISPLAY TEMP & TORQUE
47
off
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