I have a couple lionel gp engines with pullmor motors...also have tmcc...want to get one to start running backward so can doublehead like is typically seen...which wires do I swap on the motor to reverse it?
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Gibson,
If both engines have TMCC, no need to swap any wires. You can run the two as one in a "train" mode. I have done this with my ATSF PA ABBA #2000 many times, works very well. Another way to do so, and I have seen work well, place the lead engine in forward, the second in reverse with their separate IDs, throttle up to equal RPMs and balance them. Again, there is no need for any internal wiring changes.
Hope this helps you...
Take care, God bless
Jesse
Forgot to say I run conventional. ..mentioned tmcc because I thought that might effect what I would need to change..the engines have it, but I don't use it..
Swap the two armature leads.
Woah! If these are Pullmor motors running under conventional control then you have to "sync" the e-units. Get the first loco running the way you want. Then take it off the track (holding it upright) and do the same with the 2nd loco.
The e-units are a mechanical system that will "remember" the state they stopped in unless you turn it upside down. If one loco loses contact or if you're too quick on the reverser they can get out of sync. To overcome this problem you have to "MU" both motors to the same e-unit.
To do this, you'll need a wiring harness between the locos. If you've already MU'd them and they're fighting each other, then follow John's advice about swapping the wires.
Originally Posted by Ted Sowirka:
Woah! If these are Pullmor motors running under conventional control then you have to "sync" the e-units.
The e-units are a mechanical system that will "remember" the state they stopped in. If one loco loses contact or if you're too quick on the reverser they can get out of sync.
He said his engines are TMCC equipped, so they most likely will have DCRUs in them, not electromechanical e-units.
Sorry, didn't see that part. The other fellows are giving you the correct advice.
Sorry!
You could lock out each engine using the run/program switch One in forward and the other in reverse howeveryou're stuck in one direction only.
TMCC engines start in forward and when set to program it locks the direction.
You could install a DPDT switch on the brush leads(per GRJ) to switch the brush polarity as desired.
I like the switch idea, that way you can change if necessary. 
Gibson,
What you're going to want to do, and what I do for my twin NYC TMCC/Pulmor Geeps, is set them up as a train in the remote and make the back one "reversed".
Use the attached quick reference card from Rocky Mountain Division of the TCA...
What I had to do is adjust the stall voltage of each unit so that they would run together, and do so quite nicely.
To do this, get the engine moving without stopping, press the SET button and lower the speed until it just stops. Press SET again... and done.
I hope this helps...
Thanks,
Mario
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Originally Posted by CentralFan1976:
Gibson,
What you're going to want to do, and what I do for my twin NYC TMCC/Pulmor Geeps, is set them up as a train in the remote and make the back one "reversed".
Use the attached quick reference card from Rocky Mountain Division of the TCA...
What I had to do is adjust the stall voltage of each unit so that they would run together, and do so quite nicely.
To do this, get the engine moving without stopping, press the SET button and lower the speed until it just stops. Press SET again... and done.
I hope this helps...
Thanks,
Mario
He's not running these in command. They're TMCC engines that he's running conventionally.
I do this with a pair of conventional SD40s. Both have mechanical e-units and dual pullmors.
I locked one e-unit in forward and the other e-unit in reverse. Coupled tail-to-tail they will run all day together, but only in one direction.
Eventually I will upgrade both engines with AC commanders.
