Yeah, it's a fairly straightforward process. The top bearing isn't actually a bearing at all, but a simple piece of flat steel that basically just holds the to

Yeah, it's a fairly straightforward process. The top bearing isn't actually a bearing at all, but a simple piece of flat steel that basically just holds the top spindle of the blower in place. When you take the fan apart, you'll see what I mean. It's lubricated by some cotton infused with some pretty thin lubricant, and over time, that lubricant/cotton combo loses its lubricity. Mine was starting to make noise, so I took it apart and slathered wheel bearing grease on that contact point, and it's been going for six months now with no problems.