Some additional details. Careful of the little ball bearings which you can see in step 7. They could fall out and get lost. It's kind of hard to put back together as well.

Also, At the end when I put it back together, there was some resistance to the fan moving. I set it horizontal, loosened the screws holding the motor to the casing (seen in step 10), turned the fan on, let it spin so it was happy, turned off and unplugged the fan, then tightened those same screws down and it seems happy.