Back in the early 1990s, Jim Kindraka wrote an article in the NASG's Dispatch about what to do with problems found with this model. In general, they ran poorly out of the box. The source of the problem was that the builder didn't wire the units correctly. Wheel wipers are installed against the backs of the non-insulating wheels. However, upon removal of the body, you will discover that the motor leads are connected to the top of the gear towers. But, the gear towers are electrically isolated from the wheel wipers. The fix is easy; solder the motor leads to the wheel wipers. It requires removing two bolster plate mounting screws. No need to remove the drive shafts or disassemble the trucks.
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