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Take the back cover off the motor and then there will be four nuts that
hold on the back bearing cage of the motor. After removing that, you
will find 7 large screws in beside the motor that remove the gearbox.
Go to www.hobartservice.com, register, then go to select "food machines" in the Product Group, then "mixers"and look for the Discontinued Products, then find the N-50 mixer drawings, they are all there, even the old ones. Look through the "exploded" drawings for your extra parts. It seems to me that the tech who put this together should know if they belong to this mixer or not. Does he work for Hobart? Or is he a repair person who states that he knows how to repair Hobart products. If he does'n't work for Hobart, these parts may have been on his bench BEFORE he looked at your mixer. A true Hobart Tech has access to specs on ALL models and the ability to access the Service Manuals. If you find this solution helpfull, please rate it. ricardok45
Some of the N50's were packed with a white grease. It tends to seperate. So the oil portion finds it's way out. It sounds like it is getting into the motor case, and is running down the inside of the column. Hobart now uses a brown clay based grease --- Darina 2.
If the amounts are small, and the mixer is not excessively noisy, I wouldn't be concerned. If you wanted to fix it, the transmission would need to be removed, cleaned, and repacked. For a Hobart tech, 3 hours labor, $45 grease, plus parts.