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Marvin window fan blade removal  Rate Topic 
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 Posted: Mon Jan 30th, 2017 10:24 pm
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Ryan Blazei
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Hello! This Marvin has what appears to have 2 very stuck blades. What are the chances these are just really stuck or is there a way to remove them I'm completely oblivious to? Bearing puller didn't work, screw drivers didn't work, and the hub is drowning in penetrating compound. I'm out of luck! 
Forgot to mention that I did remove the set screw on the blade up and did spray penetrant into the hole.


Last edited on Tue Jan 31st, 2017 01:24 am by Ryan Blazei

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 Posted: Tue Jan 31st, 2017 11:08 am
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Tom Zapf
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that is strange they aren't usually hard to get off with a little bit of care and effort, and very little at that. IS it necessary to get them off? the fans looks pretty clean..... I was going to ask about the setscrew but you answered that. Strange that both are stuck on, I have had dozens of these fans in various configurations over the years and even the rusty junky ones came apart. The aluminum is very easily bent on the blade petals so be careful. I am surprised the screwdriver method did not work.. hmmmm

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 Posted: Tue Jan 31st, 2017 11:33 am
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Ryan Blazei
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It would be nice to be able to take it apart and soak the dry bearing in oil, but that isn't required. Interesting, thank you Tom. 

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 Posted: Tue Jan 31st, 2017 01:43 pm
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John Fengel
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Some fans have an additional set screw under the first one. Just a thought but you might check it out.

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 Posted: Wed Feb 1st, 2017 10:08 am
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Lane Shirey
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Can you try heating the hub with a heat gun? Might expand it little. Not much clearance though the way it looks. 

If not, give the penetrant time to work. Also try filling the setscrew hole with penetrant, let it soak in, and then rotate the blade 90 degrees and let it sit overnight. If still no luck, do it again and rotate the other way. 

It's likely the hub is aluminum and the shaft steel. The 2 dissimilar metals plus some moisture can cause galvanic corrosion binding the 2 metals together. Penetrant will eventually work. Be patient. 

Best of luck getting them off. 

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 Posted: Wed Feb 1st, 2017 11:43 am
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Tom Zapf
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The marvin fans do not have a second set screw under the first one as a bunch of fans do(learned that the hard way) . The blade is aluminum, I am not sure what the hub is, but since they are pressed together you have to be careful. try to focus on getting the hub to move on the shaft and don't use the blade for leverage. The bracket that holds the bronze bushing has a felt wick that will hold a good amount of oil, but you cant get the front motor cover off without removing the blade. If you were close by I could help you but I cant explain how I use a screwdriver as a wedge. Your fan doesn't look rusty so as lane says the penetrator should work!...

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 Posted: Mon Feb 13th, 2017 05:16 pm
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Tom Zapf
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how have you made out since?

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 Posted: Mon Feb 13th, 2017 06:34 pm
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Lawrence Smith
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that is all metal ,I would use heat on the shaft & a lite hammer tap to help loosen the bonding.I hope you are not using WD 40 for the penetrant.
 Lawrence

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 Posted: Tue Feb 14th, 2017 12:08 am
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Ryan Blazei
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Hello! I have to thank you all for your help, and I was able to successfully remove the blade. This will become a great runner on those warm summer days!

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 Posted: Tue Feb 14th, 2017 03:36 pm
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Tom Zapf
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they are good fans and will last forever with care. The plastic junk today isn't the same. The accordion side panels and the plastic itself just disintegrates especially if left in a sunny window, a shame too as most are pretty quiet and have features. Good luck with this one, it will be great in the summer. just the sound of them running takes me back to childhood.

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 Posted: Thu Feb 16th, 2017 08:39 pm
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Steven Hubschmitt
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Why not WD40?

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