Originally Posted by
Cari-in-Oly
These machines definitely have a "sound", the higher pitch of the 401 indicates to me that the upper motor bearing could use a drop of 30wt. oil. I keep a syringe of 30wt. just for these motors.
Cari
Thank you for this advice. I have a 401 that is super loud and whiny. When I received the machine the 'upper motor bearing' section was full of sunflower seed hulls! I cleaned it out as best I could, even removing the motor and taking it apart to clean it, but assumed the loudness was due to any debris that I may have missed. I am definitely going to give this idea a try!