Scotsman Prodigy Plus D Series Service Manual - Manual (Page 50)

N0422, F0522, N0622, F0822, N0922, F1222, N1322, F1522
Air, Water or Remote Service Manual
December 2014
Page 50
Auger and Evaporator Inspection
The auger must be carefully inspected for wear and
scale. The wear areas are the top bearing surface,
drive junction and the edges of the flights. The edges
of the auger have horizontal serrations and there are
highly machined areas in between. If the auger has
contacted the evaporator wall, it will have very rough
flight edges and should be replaced.
Scale forms on the auger during normal ice making.
If scale is still on the auger after cleaning in the
ice machine, the scale can be removed using ice
machine cleaner and a nylon scrub pad.
Inspect the auger, the critical areas of the auger are:
1. The auger body. It should be clean and shining.
Sometimes an auger will appear clean when wet, but
after it is dry it will be seen to be stained. Scrub the
auger with ice machine cleaner and hot water.
Caution: Ice machine cleaner is an acid. Handle it with
extreme care, keep out of the reach of children.
2. The water seal area. Because the auger has been
removed, the water seal will have to be replaced.
Remove the water seal top half from the auger, and
remove any sealant or debris from the shoulder of the
auger where the water seal was.
Inspect the evaporator's interior. The interior is
stainless steel that should be bright and shiny
when dry. If it isn't the scale on the surface must be
removed. To remove scale:
1. Remove the water seal; it will have to be replaced.
2. Use a brass wire brush and scrub the interior of the
evaporator vertically to remove any scale.
3. Clean up any debris from the top of the gear
reducer.
Example of a clean auger
Example of Scale Build UP on Evaporator Wall