Airsense 9 and 10 Motor Anatomy. Yes, it is possible to change the bearings...
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
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
“Men fight for liberty and win it with hard knocks. Their children, brought up easy, let it slip away again, poor fools. And their grandchildren are once more slaves.” - DH Lawrence
