18 years ago
weatherstripping was shot; leaks caused the motor to rust up and
seize. I was able to disassemble, free the bushing from the armature
shaft (which was responsible for the seize), and rewire the leads. I
also used some emory on the commutator, and cleared any crossover
between the segments. The brushes are in excellent condition.
I oiled and reassembled. The armature turns freely.
However, when I apply power (forward or reverse -- it spins in either
direction), it turns a fraction of a revolution, and locks up. I
remove power -- turn the shaft slightly -- and reapply power. Same
thing: A fraction of a turn.
Do I have a bad armature? Suggestions?