OK. I got a similar blower from a different AliExpress store (higher price but free shipping, so it came to about $50 either way). https://www.aliexpress.us/item/3256805778594612.html It's missing a 2-pin connector. The 3-pin in the picture is the motor drive, so I installed it and it works properly...

Update: I got the blower from Aliexpress... the only modification needed was to cut off three molded plastic legs that the M-series doesn't want (the blower is supported underneath by the molded foam). Unfortunately the one I received was not good - the bearings were slightly noisy (audible when win...

Unfortunately, although the new bearings did help somewhat, it's still way too noisy to sleep with :( The problem is most likely the balance, as I mentioned, but there is no way for me to rebalance the assembly to the required tolerances. In the meantime I was interested in comparing relative noise ...

Inside the blower. There's one plastic spacer missing (fell on the floor, rolled away and it took me half an hour on hands & knees to find it). Unfortunately I realized I may have screwed up... if the rotating assembly is balanced as a unit, I didn't mark the orientation of the brass "hat" to the im...

This looks like a possible direct replacement blower. It even has the same connectors. The gasket on the output looks easy to remove. I think I'll gamble the $50 (with tax and shipping) in case my attempt at a rebuild doesn't work!
https://www.aliexpress.us/item/3256806603465735.html

Today I removed the blower (only a 5-minute job now that I know where the outer case screws are) :wink: and took it apart again. Pressing the bearings (actually R3 Z upon close inspection) and the center ring magnet from the shaft was a delicate process because sintered/pressed magnetic objects tend...

I sent ACBio an inquiry, thanks again. But I'd be surprised if blowers were even available, let alone for sale direct :wink: I also asked how much they'd charge to fix it themselves (most likely not worth it for a machine made in 2007...) As an MD and an EE, fixing old machines for my personal use d...

Thanks... that site is in Colombia and looks like one of those where they don't actually have any parts, just take requests and then see if they can get it somewhere and mark it up. :roll: Meanwhile I was able to disassemble the blower. It's a simple three-phase brushless motor. With a scope, I can ...

I have two otherwise good Remstar Pro M-series machines in need of repair... one with a bad motor and one that is noisy. I'm quite capable of swapping the motor myself, or even doing internal repair on it, but I can't locate a replacement. There does not appear to be a non-destructive way to disasse...

Having recently worn out my second Remstar Pro C-Flex, and discovering just how expensive machines have become (especially since I now have a high insurance deductible), I was pleased to buy a used (1700 hr, or about 7 months) Pro 2 C-Flex. Unfortunately it was from a smoking home. The tubing was ju...