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I got my bearings rather quickly. They are regular ball bearings, not the specialized Hoover bearings. The part number is 1602-ZZ. They are the same inner bore diameter and outer diameter, but not as thick. I used a stack of four 1/4" washers to take up the slack. I was able to immediately tell the difference in the brushroll. The new replacement bearings I had installed previously were rough, and you could hold the end of the brushroll in your hand and twist it and feel the roughness. You could even feel it just by holding the bearing between your fingers. Which is a shame, I guess they are not OEM bearings, but they are still new and shouldn't be... crap. Besides, all four of the original bearings felt the same. Well, three, one of them was completely shot.


With the new regular ball bearings installed, the brushroll is super smooth. I also replaced the two identical bearings on the outer ends of the transmission input shaft. I had some trouble with that, as the dimensions must be just slightly different. With the nuts tightened down, the shaft became stuck. I thought I could find a very thin washer to put on the shaft, to space the bearing up the shaft a bit, but could not find a washer that was small enough in diameter not to interfere with the spring washer that provides thrust for the bearing. Interestingly, my transmission only had one such spring washer (the brushroll has two). I found the solution was to simply remove the spring washer, and that loosened it up just perfectly.


For anyone else attempting this, note that you will have to make the appropriate thrust adjustment as needed, because I doubt these were built to a tight tolerance. In fact, the surface finish quality on the transmission case is garbage.


I wasn't able to run the machine tonight, I finished while everyone in the house was asleep, so. However I am seeing some roughness in the motor as well. I'll have to check that out too. But later, I don't much feel like taking it apart right now.


I was thinking these bearings wouldn't take the thrust forces, but now that I think about it, there really isn't any thrust force. Just a tiny bit from those spring washers.


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