I know it does not just bolt in, you have to mod the loco, but I was under the impression it was the custom painting of the Emmett Kelly loco and associated cars that make the unique circus train that was to be retained.

If it was just any old battery operated big hauler, I would have advised to throw it away and start over with a nice used loco of non-battery vintage.

Looking at the paint job on the loco, perhaps an "ordinary" Big Hauler could be painted to match...

Several ways to skin this cat (sorry kitty!)

Greg

Well, the best thing is probably get a new chassis from Bachmann with the much improved drivetain

Find an old loco for cheap and take the part, paint as needed.

Track curve "diameters" and "radius" is measured center of track to center of track.

I have no clue on the "layouts".

Is there a link you can publish for reference?

I looked at the exploded diagram and it was hard to determine which were the springs in the drawing.

Did you call the Bachmann parts dept?

Umm... my opinion is that the original purchaser wanted the fancy valve action and took it and put it in his loco, and replaced it with what he could buy, since the chassis looks new.

OK, so the tender is a V7, most electronics there, and I would assume the chuff circuitry.

Now, are the 2 large connectors on the tender and are the corresponding sockets on the loco, and do those wires go to the motherboard on the loco?

trying to see how "far" the V7 wiring goes from the tender to the loco "guts"

That was our guess, V5 or 6 chassis in V7 loco and tender... seems so...

That board now comes with the chassis, as stated in another thread... Looks to try to be "universal"...

older model was mechanical switch, drum with contacts on axle. two wires. I'm not sure when/if the latest version has the ir sensor... I know the C19 has a blade inside the cylinder connected to the piston rod that is the trigger. Again, have not seen it apart, but I think it might be a led on one side and the sensor (+, -, trigger) on the other side.

hmm... looking at the C19 wiring diagram, the sensor has 4 wires...

Maybe someone knows, but does your chassis have the chuff "drum" on one of the axles?

Yeah, it's been out of production (K-27) for years. The first time I "saw" the PNP adapter was with the Dash 9 re-issue, but it may have existed earlier.

In any case, That's what john should start with, but he's not responded to my questions, so I cannot take him to the next step in debugging the problem.

Your K27 came with it? Hasn't it been out of production BEFORE the PNP adapter was even made?

Stan?

There is a thread on MLS about this.

So, no one has a schematic

I believe the board is designed to accomodate old and new wiring schemes, specifically chuff triggers.

One version is a simple switch, that is most likely the 2 pin connector.

The other style uses a sensor, which takes 3 leads...

That's our best guess.

Yes it helps... did not know it was being supplied with all current production locos with the socket.

So that's one less thing for jebouck to buy...

Thanks Stan

He posted on the last day, it was still working as of that day... I appreciated it.