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| You don't just stuff in the new brushes. Ideally you use a lathe to turn the commutator back straight, then a mica under cutting tool to remove some of the mica between the commutator bars so you have a fresh commutator surface, then you fit the brushes to the new commutator diameter.
As a minimum you need to fit the brushes to the commutator by wrapping a strip of sand paper the width of the commutator half way around the commutator cutting side out, then insert one new brush and slide the paper preferably in the direction the armature rotates to carve the inside of the brush to fit the commutator. Its much harder to get a good fit when the commutator is worn into ridges. Then you do the other brushes. If you don't fit the brushes to the curve of the commutator you will burn them rapidly and won't be good to the copper of the commutator either. An experienced auto electric shop can turn and re brush a starter in half an hour. If it needs that attention, it might also need bushings at an added cast. When the bushings wear the armature drags on the field poles and won't crank an engine.
Gerald J. | |
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Question about Delco Remy starters
