I have a Shark top/line vacuum machine and the motor that powers the floor brush quit. As luck would have it, I had a complete new head assembly that I put on and was back in business. Any other time I’d likely just found a matching motor online and replaced. Before I trash this old unit I thought I’d look it over. I believe the motor went bad just because turning the gear/armature produced a “lope”, not smooth. Possibly about 4-5 lopes in one rotation. Should be smooth turning, right? It has two brushes on the sides but I haven’t gotten to them yet—appears they are held in place with a drop of solder…

 

Maybe best to take the motor apart and check a few things, one would be the bearings for one.
I have one of those shrks two, and they do a good job.

 

Maybe best to take the motor apart and check a few thinks, one would be the bearings for one.
I have one of those shrks two, and they do a good job.

I got the brushes out and they were fine. And it still “loped” when turning by my fingers. Weird how it feels a little “rubbery” when it comes up against one of these little “segments”, slight pressure, and then release. I would think it would feel totally metallic. My mind is envisioning bearings of tiny rubber balls…LOL (still fuzzy from waking in the wee hours to pee)

 

Generally the bearings are simple Oilite brass/bronze sleeve versions.