Scotsman TDE470 - Manual (Page 18)

Inspection: Auger
The auger is made of stainless steel. It has a
polished surface that may be either shinny or dull,
but must be smooth. After removal, allow the auger
to dry to inspect for scale. If mineral scale is found
on the auger’s surface, clean off the auger with ice
machine cleaner and a scrubbing pad.
Remove the water seal and clean off the shoulder
of the auger.
Bearings: The top bearing should spin freely with
no rough spots. If it feels rough when spun by
hand, replace it. There should be minimal rust or
dirt. If in doubt, replace the bearing.
Note: The top bearing used in the TDE470 is a
"directional" bearing. Note which way the inner
race is configured and install into the breaker. The
breaker is also available as a replacement part
with the top bearing already installed.
The bottom bearing must be removed from the
evaporator when replacing the water seal.
Remove bin cover.
To replace the water seal:
1. Remove old rotating half from the auger. Clean
the mounting area.
2. Place a bead of food grade sealant (such as
Scotsman part number 19-0529-01) onto the
shoulder of the auger where the rotating half of the
water seal will be installed.
3. Wash the new seal in water. While wet, slip it
onto the bottom of the auger, rubber side toward
the auger. Push up until seated against the
sealant. Do not allow any sealant to come into
contact with the face of the seal.
4. Wash the stationary half the water seal with
water. Slip it up into the bottom of the evaporator
until the bottom of the seal is inside the evaporator
about 1/4".
5. Push the bottom bearing against the water seal
until the bottom bearing is inside the evaporator
about 1/16".
6. Replace the evaporator on the adapter, and
re-attach the stand using the original bolts.
7. Attach the auger to the top bearing
and breaker.
8. Return the auger to the evaporator
and slide it down until the splines touch
the coupling.
9. Rotate the auger until the coupling
splines align with the auger.
10. Push the auger down, and rotate
the breaker until the screw holes line
up with the pilot holes in the evaporator.
11. When the auger is completely
seated, reinstall the breaker screws.
12. Replace permagum and foam top.
13. Switch on the water supply.
14. Check bin cover for electrical
grounds and switch on the electrical
power.
15. Observe operation. The unit should
make minimal noise while producing
ice. Catch first 2 minutes of ice and
discard it.
16. Replace the bin cover and all
panels.
Sealant
Here
Water Seal
Open
Sides
Inner Race
Wider on Top
Side
Outer
Race
Rubber
Smooth
Side
Remove the three bolts holding the
evaporator to the
gear motor adapter
and lift the
evaporator up
slightly. Tap the water
seal and bottom
bearing out from the
top down. Check the
bottom bearing the
same way as the top.
Replace the water
seal and install a
new bearing set if
needed.
TDE470
February 1995
Page 18