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+--- Thread: Airsense 9 and 10 Motor Anatomy. Yes, it is possible to change the bearings... (/Thread-Airsense-9-and-10-Motor-Anatomy-Yes-it-is-possible-to-change-the-bearings)
Airsense 9 and 10 Motor Anatomy. Yes, it is possible to change the bearings... - Kingsway - 06-02-2023
Machine had done 6500 hours, and is only a couple of years old. But the 'whine' from the motor was quite noticable and likely to keep the user awake.
I already ordered and fitted a new motor from AliExpress - just over a week to arrive. Not much more than 20 minutes to change - easy job, as I had previously opened-up the machine to clean and sanitise the airpath, and give the foams a good wash and rinse. Machine is now very quiet indeed. Motor noise can only be heard if you put your ear to the air intake. (There is a very slight whine, which can only be due to bearing noise!)
Re-furbish the old motor?
Changing the bearings does appear to be do-able. Biggest difficulty in disassembly may be the need to make a puller to remove the bearing races from the shaft.
I removed both ends of the outer housing with a Dremel tool and cutoff wheel. Fans are a push-fit at each end of the armature.
Larger bearing and armature retained by a plastic ring - easily removed by cutting off the retainig tags with a craft-knife. Could be epoxied or CA glued in place on reassembly.
Larger bearing is an R 13400HH - the smaller bearing, I would need to make a puller to get it off and measure it / read the number. But looks like it is 4mm ID, 9mm OD.
One advantage of doing the work would be having the choice to use some high-quality SKF or other bearings - which might mean the motor is better than new!
Hope this may be of interest?
Cheers
RE: Airsense 9 and 10 Motor Anatomy. Yes, it is possible to change the bearings... - MoreBeers - 07-15-2023
Thanks for that, very interesting.
It could also be interesting to try that level of disassembly, just to properly clean a pre-used Motor. But, having gone that far just to clean one, it would be a shame not to also change the Bearings whilst it is apart. I appreciate cost is a factor but, someone must try this!
I may try, as I have one Motor that whines badly in a test S10 I have, so that one is an obvious candidate for a rebuild with new bearings.
Getting around to doing this is my main issue, but I do have a Dremel so, it would be a shame not to at least try!
MoreBeers