Product review (5 stars): A Quick Fix
the old unit was corroding at many points on the auger where the chrome plate had been knocked off by mineral fragments in the cold water. I had two options; buy a new auger and guess my way to dismantle the unit and rebuild it (for which there is no DIY procedure), or buy the entire bucket and auger. I opted or the more expensive assembly because installing it only involved removal and replacement of four screws. It only took a few minutes. The next step will be an in-line filter to prevent a recurrrence. That's unlikely because the refrigerator is now about 26 years old.