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Need to get Rusted NUT off Armature of Electric Mower from Hell.

I am trying to get the rusted on nut off of the blade on a Craftsman Electric lawnmower, 900370510. It turns with the armature. So, the square plastic washer spins under the square metal washer with the nut that is rusted on the motor.
I've used CRC, wrenches, 2x4's to brace it, propane & a little mapp gas. Problem is, the whole thing has plastic parts which will break if you chock it. It looks like the mower has quite a few years on it.
PS, it is a LH thread, @#$%!

Would someone tell me the golden answer? I don't want to buy the lady a new motor.

Thank you

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I find that nut splitter work ok on occasion if you can get one in there, and just replace the nut(sounds like that's going to happen anyways regardless) , or pick it up, set the nut on a solid piece of steel, so that it's supporting the weight of everything, and hit the other side of the nut with a hammer, or a hammer and chisel, with the chisel perpendicular to the shaft and the blade splitting it the long way. Other tricks, are to heat it up red-hot, and hit it with water immediately, or even canned air inverted(will freeze it instantly) in order to get the surfaces to change enough to break loose. Hope these helped; they've been standbys for me for years.

Posted on May 06, 2010

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