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How can I unscrew the central axis from my vacuum cleaner's motor. It appears it is sealed with some sort of green substance and it doesn't move at all. I already tried dissolving it with acetone and WD-40 and had no luck. Thank you.

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  • looks like a locknut that you need to apply some torque to. Also see if you can lock down the axle to stop it rotating as you try and unbolt it Sep 7 '20 at 9:17
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Heat is a common method to make threadlockers let go - some specifically require it. Odds are excellent that it's Loctite Green or a knock-off of that. That specifically mentions "heat and hand tools" implying that it should not need high impact to remove once you heat it up.

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    If locktight some heat and it may spin right off keep in mind it may be a left hand thread also.
    – Ed Beal
    Sep 7 '20 at 14:51

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