No, they are really simple to disassemble, just a coupla bolts holding it together on the outside and 3 on the inside to take out... The brushes are held in by small bolts and use springs to press them against the sliprings, once you have them in you are set, you will need to use a paperclip or a piece of safety wire to hold the brushes back while you put the rotor back in, then just pull it out once you are back together and the alternator wil be as good as new...
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