I have this motor I salvaged from a dryer, and I'm interested in reversing the direction of spin because it spins in the direction opposite of typical machine threads. 
The Capacitor is shown at the bottom of this picture(relative to the picture, just above the white letters): 
The cyan and white-red wires are AC lines. I can't figure out what the purple wire is, and the dryer wiring diagram says nothing about the motor aside from how it is wired in the dryer. Additionally, the connector that connects to the terminal block does not have a wire for the purple pin, leading me to believe that it is used in starting the motor. Using an ohmmeter, the purple wire is connected to all of the ac lines.
Answer
It looks like Charles' point that you can't get to the windings is the case. There looks to be three wires coming from the windings and no starter switch. so you have this case:
So it looks like the white/orange is tied to the two windings, main and aux, (the lower line). So unless you can reach into the windings and reverse one of those, you can't reverse it. If you can, you want to bring another wire out so you can separate the connection from main and aux. from the white/orange.
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