Some time ago I picked up a 4635 and now am getting around to redoing it. THis model has the Flyer automatic reversing unit and I suspect it is wired incorrectly. As long as the reverse unit is locked out the motor runs fine and can be manually reversed. Once the reverser is engaged the motor just hums. Does anyone have a wiring diagram for a Flyer pre war wide gauge engine with the reverse unit? Also other FLyer units with a reverse unit have a lever that extends somewhere outside the shell so the the reverse unit can be locked out. This one only has the lever internally and I see no place for it to extend externally, anyone have any idea or some pictures?