Quick question--my small electric motor in the front part of my furnace kicks on with the thermostat (to push air to the combustion chamber I assume, it is one of those sealed chambers with electric glow ignition)says to lubricate with SAE 20 wt. oil. My father always used 3 in 1 oil for such lubrication with no problems that I know of. Any recomendations out there? Thanks.
Electric motor on Furnace
- Thread starter lobo11
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Just use 3-in-1 SAE 20wt oil for electrical motors and oil it regularly (every 3 months or so) and you'll be home-free.
Don't worry to much about the rest of the problem for you are not dealing with an internal combustion engine to begin with (even bearing materials and operating properties are different)
Don't worry to much about the rest of the problem for you are not dealing with an internal combustion engine to begin with (even bearing materials and operating properties are different)
MolaKule
Staff member
Well Lobo, I posted an answer last night but wola, it's gone.
What I had suggested was 20 weight or 30 weight ND (Non-Detergent) oil for electric fans.
20 weight for fans inside the house, 30 weight for fans outside.
What I had suggested was 20 weight or 30 weight ND (Non-Detergent) oil for electric fans.
20 weight for fans inside the house, 30 weight for fans outside.
Thanks guys.
MolaKule
Staff member
My apologies Vetteman.
I don't think I am having any problems with 30W.
Since the air conditioner only runs usually above about 75 degrees I would like to ensure the oiling works good. The bearings or bushings must get hot as the motor only runs when it is hot. 90W synthetic gear oil seem like excellent stuff.
Jim
CYWG
Since the air conditioner only runs usually above about 75 degrees I would like to ensure the oiling works good. The bearings or bushings must get hot as the motor only runs when it is hot. 90W synthetic gear oil seem like excellent stuff.
Jim
CYWG
MolaKule
Staff member
Be careful with gear lube. It has detergents, dispersants, and high sulfur and phosphorus levels. Ever see S-P migrate into electrical windings and the resultant effects?
Recommend you use the mineral ND oil and make sure wicking and seals are in good shape.
Recommend you use the mineral ND oil and make sure wicking and seals are in good shape.
Don't use the gear oil on the bronze motor bushings. Think of the bushing as a sponge, soaks up the oil and maintains a film to lubricate the rotating shaft. The gear oil is too heavy or the individual molucules are too big to soak into the bronze. End result, loss of lubrication and seizure. This caused me to lose an AC outdoor fan. Been using Militec 1 for the past 10 years and things have been great since.
WDP
[ February 28, 2005, 09:24 PM: Message edited by: WDP ]
WDP
[ February 28, 2005, 09:24 PM: Message edited by: WDP ]
hmmn, the heater fan motors on my old Bmws are permanently lubed. Ive tried out several methods of re-lubing the bronze bushings. My latest scheme is to suspend the motor ends in a cup of ATF over night. Is this gonna work? Are the detergents in ATF gonna cause trouble?
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