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It is interesting to see the details of the anti-rotation stops for the traction motor.  You can see the two cast lugs on the motor case in Ed’s first photo, and the corresponding feature on the truck bolster that those lugs engage in the second photo posted by WSOR above.  It looks like there is a stack of rubber cushions built into the feature on the bolster.   <o:p></o:p> I wonder if that anti-rotation feature is known to have ever failed by breakage.  I suspect that it is designed so that even if there were a break, the motor would crowd into the bolster and be prevented from rotating down to the point where it would jam into the ties.
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