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 Posted: Thu May 21st, 2020 01:01 am
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Tim Moyers
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This fan has been in my family since before I was born, it has kept me cool upstairs for many years. I tore it down and removed the rust/paint it was a lot of fun giving some love to something that took care of me. I cleaned out the motor found a couple bad shaft shims which explained the shaft travel it always had but ran whisper quiet. After reassembling everything the fan spins freely but im getting a knocking sound when the blades load and push it to the rear. I removed the blades and put a tiny bit of pressure on the shaft pushing it to the back and the sound returns. I have tried multiple combinations of adjustments and it continues to do it. Any clues?

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 Posted: Thu May 21st, 2020 01:35 pm
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Tom Zapf
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IT MIGHT BE THE TYPE OF SHAFT SHIM YOU PUT ON THE BACK OF THE SHAFT TO TOUCH THE REAR BEARING. FIBER OR SORT OF A PHENOLIC INSTEAD OF METAL MIGHT STOP THE NOISE 

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 Posted: Thu May 21st, 2020 06:32 pm
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Tim Moyers
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Thank you for the reply Tom, I did try a nylon washer but it still does it. Looks like I am going to have to experiment with different types as you stated. I will definitely give feedback when I get time to try other materials, thank you.

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 Posted: Thu May 21st, 2020 08:04 pm
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Tim Moyers
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Ok, took the fan out to the shed opened it up tried a shim i made between 2 originals in the back. I made it out of gasket material which is very tough and thin. Put it back together and the noise is still there. took off the fan blade but noticed the set screw was loose so i turned it on without the blades and no rattle , reinstalled the blades and put a little more torque on the set screw PROBLEM SOLVED. Shes running as quiet as ever and putting out hurricane winds. Thanks again for the idea it definitely was part of the problem. 

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 Posted: Fri May 22nd, 2020 02:01 pm
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Tom Zapf
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GOOD DEAL . THAT IS ONE OF MY FAVORITE FANS, I HAVE 2 F THOSE AND ALSO AN EARLY 4 BLADER AND AND LATER 4 BLADER PLUS A MID 50S 3 WING THAT REMOVES FROM THE STAND AND TILTS TOO. THE BIGGIE IS I HAVE ONE OF THE DOUBLE MOBILAIRES ON THE STAND WITH TWO OF THOSE MOTOR UNITS AND FAN BLADES...I ALSO HAVE ONE OF THE 60S VERSIONS TAN AND BROWN, LIGHTER MATERIALS BUT TILTS TOO 

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 Posted: Fri May 22nd, 2020 02:11 pm
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Tim Moyers
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I would LOVE to find one of the double ones, they look like powerhouses. I would love to find the original logo badges for this fan also (made one from a printer and lexan ).  Im very happy how it turned out from before to after though. Heres a before pic.

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