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Emerson 77646-as. Blade removal?  Rate Topic 
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 Posted: Thu Sep 24th, 2020 01:42 am
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Dave Powell
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I have an Emerson 12”  77646 -AS   fan and mine apparently does not have the hole in the back side of the rotor to fit anything like a Phillips’s screwdriver into to allow for fan blade removal.  I have the oval hole in the outer casing as described in previous posts, just nowhere to go after that.   Suggestions?  Fan needs a deep cleaning and a new head wire. Also, I don’t suppose anyone has ever removed the cage on one of these without first removal of blades?

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Last edited on Thu Sep 24th, 2020 02:08 am by Dave Powell

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 Posted: Thu Sep 24th, 2020 08:58 pm
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Mark Olson
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I believe that if you examine the cage carefully, you will discover how the front may be removed, allowing full access to removing the blade. Often, removing one of the oscillator gear box screws will allow a binding bolt to be threaded in to lock the rotor, sometimes even fitting into an existing divot.

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 Posted: Fri Sep 25th, 2020 11:31 am
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Steven P Dempsey
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I recall that removing the rear bullet allows access to a hole to lock the rotor

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 Posted: Fri Sep 25th, 2020 12:24 pm
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Dave Powell
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Mark was correct. The left bolt that mounts the gear box is the key. NOT the oval hole as other posts suggested.

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 Posted: Sat Sep 26th, 2020 03:48 am
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Dennis Long
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I'm currently working on a 77646-AS too.  This is how I removed the blade, after tightening the screw against the rotor just enough to keep it from turning. :



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 Posted: Sat Sep 26th, 2020 02:07 pm
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Dave Powell
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YEP! And although it does not look it, the cage is two pieces. Loving this design/model.

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 Posted: Mon Oct 5th, 2020 01:33 am
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Dave Powell
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Next question- How do I remove the stator on this unit? Or the rotor for that matter! All four long case bolts are removed and the stator won’t budge. ... and that rotor, most fans I have worked on so far (not that many) the rotor just falls out when case is opened, this one seems to have a nut or something.

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Last edited on Mon Oct 5th, 2020 01:36 am by Dave Powell

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 Posted: Mon Oct 5th, 2020 08:44 am
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Mark Olson
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The 'cap' on the shaft in front of the rotor unscrews. Keep track of the fiber washers in front and in back of the rotor. After the rotor is removed, to remove the stator, find a piece of PVC pipe with an outside diameter just small enough to fit inside the stator. The pipe should be  around 18" to 24" long. Place the housing and stator over the pipe. Hold the pipe with the motor on top vertically with the other end of the pipe on the floor. Lift the pipe with the motor on top six to ten inches off the floor and drop it while keeping it upright.  This creates a gravity fed slide hammer contraption. The stator will begin to move down and out. Continue this dropping/tapping on the floor method until the stator falls free. Your hand holding the pipe vertical will keep the stator from falling to the floor and your other hand steadying the motor will keep it from bouncing off the pipe and hitting the floor.

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 Posted: Mon Oct 5th, 2020 08:13 pm
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Dave Powell
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right handed thread on that rotor nut?  or left handed.?

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 Posted: Mon Oct 5th, 2020 08:18 pm
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Mark Olson
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Right handed

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 Posted: Tue Oct 6th, 2020 11:49 pm
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Dave Powell
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Worked perfectly.  Thanks for the guidance!   

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