I have a # 3186 electric loco in for repair. I am not up on the motor's reverse unit on top of the motor, and additional coil & contact points at the end of the motor. The idler gear also contains a 'cam' type piece mounted ( removable ) on the idler gear. As arrived, it is wired up to run forward only. My main question is what is the end coil / contact unit used for? I thought maybe headlight reversing? bell ? Not enough room for a bell mount. Is this the right motor for this body? I have installed a new collector and wheel set, runs good. Thank you in advance. Harry
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