Posted by John T on August 16, 2019 at 13:36:45 from (45.16.200.171):
In Reply to: DC Motor Repair posted by Vicinalvictor on August 16, 2019 at 11:58:09:
To answer "what usually burns up" a DC motor that could be armature or field windings.
To answer a common cause of non operation but its NOT burned up would be worn down brushes or brush hold down spring assemblies that are stuck or corroded and NOT holding brushes tight down against commutator.
Perhaps even a dirty oiled up or corroded commutator.
Other problems I've seen are badly worn down bushings allowing the armature to drag up against the fields NOW THAT REALLY HEATS THINGS UP.
Field wiring shorted to case is another possible cause I've seen
I've also seen burned and melted wires and solder where the armature wires connect to the commutator...
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