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I had a similar problem many years ago with a Bachmann 4-8-4. This loco had the old "inline" motor, and the brushes were toast within 6 months of normal operation. Actually, it was the springs for the brushes that went. You might want to check and make sure that the brushes have enough pressure behind them to make good contact with the armature. If you find weakened springs, a trip to your local hardware store might find the cure. Don't get brass springs, that was the problem to start with. Brass will soften with heat. Look for steel springs of the diameter you need, and trim the length accordingly. You just want light pressure on the brushes. But, remember when cutting the springs, you can always cut more, but you cannot add. Experiment with different lengths, starting with longer, then cutting down. You want the motor to spin fairly freely with a hand twist of the shaft. If in doubt, just check the friction of a known good running motor. <br /> Hopefully this will help. <br /> Todd C.
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