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
" The hose knows! "
