A/C blower motor question..

Yes ive seen the reference to turbine oil a couple times.
One person said it is distilled more times and so has less dissolved stuff in it?

Another said grease is a no-go as it dries out very quickly leaving behind all of the thickeners.

Years ago I had a clothes dryer that had a squeaking blower motor bushing which was an oilite bushing. I was told by repair shops to just reoil it with turbine oil. When I went to buy turbine oil I saw that it was just this oil that seemed to be about 20w motor oil. So I thought that was a bad recommendation and put heavy grease on the bushing instead. Well this worked for about 4 or 5 cycles and the bushing started squealing again. So I tried STP oil instead and, again, it lasted. about 4-5 cycles before It would start squealing again. So, out of desperation I finally tried the turbine oil almost knowing it was going to fail. But it lasted for years until I sold the old dryer and bought a new one. I was told that turbine oil can operate at temperatures higher than regular lubricants. Must be true!

Yes, i purchased a Fasco motor and it is in transit.
From Electric Motor Warehouse.

Those are good ideas. Maybe i will recondition the old motor and then try to rotate them.
In Arizona, it often gets to 115 deg ambient, so inside the AC cover, where it is shedding heat from the RV, its gotta be punishing temps. Ive heard people say the motors last 1-2 yrs. (car batteries only last 3-4 here...)

Cooking the bushings... i like that

I had my furnace blower motor out (PA winter where the furnace runs constantly), and was seriously thinking on how i could retrofit some ball bearings on the thing.

PA too cold
AZ too hot

the blower motor on our coleman lasted about 10 years, then started to emit a low pitched whine for a while on startup. Original motor was a FASCO, bronze oil lite bushings were dry, replaced it with another FASCO motor.

BTW FASCO motors are in our home AC and NG furnace, both over 20 years old and still purring along.

If you are mechanically inclined and you can tell the shafts and bushings are fair too good.

Our 2005 Coleman blower shafts dried and were loud in 2016. Motor shafts were stuck on both motor ends. Both sintered bronze bushings released by drilled rivets holding them on the motor ends. Cleaned dried grease from both shafts and bushing to release from both ends. Heated both sintered bronze bushings and dipped in grease and allowed grease to cool. Put bushings held back on motor bell ends using small screws rather than rivets. Reinstalled the motor on the AC and has been working for about 8 more years.

I think a replaced motor back then about something like $180.

Much more than about 2 hours for my time and no $.

Mr. C wrote:
There's nothing wrong with Fasco motors. They're very popular in the HVAC trade as replacement motors...

Fiasco is a motor I had very few problems with when I was I was working. Seems like Fasco was the only double shaft aftermarket motor any of my suppliers carried.
I used a Fasco on my 10 yr old Coleman 2 years ago. I allways replaced the run capacitor when installing new motor

There's nothing wrong with Fasco motors. They're very popular in the HVAC trade as replacement motors...

........ and, I just zoomed in on their product picture.

they are showing a picture of a Fasco motor on the AO Smith product page.

oops.. heres their website

http://www.tek4ufast.com

They want about $50 more than the cheap blower motors that are available. Also, their website seems legit, but none of the little safety icons at the bottom of their website. No paypal either.

I only find these folks selling Century (formerly AO Smith?) brand blower motors for the Coleman Mach (foil tag shows this model no. 48204-666).
I have what looks like the most basic/common Coleman AC.