I was working on a Bachmann GP-35 and somehow got the polarity reversed. Now when I run the train, it goes in the opposite direction as indicated on the power pack. I did not dismantle the motor I only tested the unit while I had the shell off. Is there an easy way to reverse the polarity without disassembling the motor assembly? Thank you for your help.
Switch the wires from the powerpack to the track and it’ll go “in the direction as indicated.”
Is this the only engine you have? Try it with another if you have one… If they both move in the same direction, than use the previous suggestion. If they move in different directions, then you have a problem with the engine.
Lee
Yes moving the direction switch from left to right doesn’t necessarily mean the engine is supposed to move to the right, just that it will move in the opposite direction of what it was running. Only way to make them match if you want it a certain way is to reverse wires going to the track or to the power pack (but not both) or add a DPDT switch so you can reverse polarity so the track power matches the power pack switch.
I’d also check the engine, I can’t see a way just by looking at the engine’s insides you could do cause the engine to reverse polarity. You’d have to change the wiring…unless you put the body back on the chassis wrong-way-around of course.
If this engine worked the way you expected before you took the shell off, and you did not remove the motor or modify any wiring, then Stix has the answer. The shell is on backwards.
I’ve sometimes used a silver or black (depending on the color of the chassis’ metal) marker to add an arrow or “F” to the front of a chassis, when it’s a chassis that can be put on wrong way around and still fit.
OR, simplest of all, pick up the engine, rotate it 180 degrees, and put it back on the track.
My brain is going on something about this question…
anyways, if you have a 2nd locomotive (DC ony, not DCC but most DCC engines can run on DC)
when you turn the throttle on do they run the same direction, the you have no problems.
Just reverse the wires on your powerpak.
yehright, just flip the engine 180 degrees thatll fix it…
If the engines do run in opposite directions, you will have to rewire the engine, or if the motor was removed and perhaps placed in 180 degrees from what it was, some motors are designed like that, some not, so its a good check.
I have no idea if shells have an effect on direction, but if wiring is integrated on the shell to transfer power, maybe that could happen if the shell replaced backwards.
Otherwise, big nopers on the shell idea.
True. The simplest idea is usually the correct one.
put the one going forward in the front and the one that is going backward in the rear.
pc