Hello - I am having trouble removing a fan blade from a motor because it is rusted on. Please see the following pics for a good idea for the problem.

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The golden bolt is rusted onto the long metal bar. I tried WD40 but it won't budge. I don't want to damage the fan blade because I need to put it on a new motor.

Any ideas how to get the bolt off safely? It is 90 degrees here and my wife is pregnant; I would greatly appreciate any assistance.

Goodman AC Unit - Model #: CK30-1A
Fan Blade Part #: B1086756
Motor Part #: B13400251 (B13400-251)