Cover pries up and there is a nut under it. Sometimes you need to rock the plastic a bit to get it loose. If the nut backed off I usually take the arm off, clean the splines with a pick and reinstall the nut. To keep it from coming loose again a drop of loctite or install a thin lockwasher and then a drop of nail polish to lock it in place.
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Sunday, December 14th, 2008 AT 8:50 PM