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Here it is on the workbench (cluttered because I interrupted another project in mid-stream to do this).Slide1

 

Four screws hold the body to the chassis, located near the corners, like just about every other toy diesel loco.  Here, I've removed the two on this end and you see only the holes.

Slide2

 

After removing the tabs the body will not come off without some urging.  These for hook-like tabs hold central body to chassis.  If you can't pull them loose by just grasping the cab and pulling, you can reach them through slots in the chassi, underneath, and push them back from engaging a bit with a screwdriver tip, etc. 

Slide3

 

Before removing the body though, pay attention to the railings.  On mine, all of the places where they touch the body were loose - they were a not-too-tight slip fit into small holes made for them.  The railings are plastic, and flexible, and I just pulled them loose, then removed the body.

Slide4

There are two boards, one mounted at each end, each directly over a truck.  The larger appears to be the motor-control board and the smaller the sound board.  This is the motor control board.  Two screws remove and it loosens and you can get at and remove the screw to the truck underneath.  Note the two clear-plastic insulating washer.  If you remove this board (NOT necessary to wire the motors in series - I'm doing it just to have a look) BE SURE to put those insulated washer back on when reassembling.

Slide5

 

Not much to see here, and confusing, four wires go into the truck, two red, two black.

Slide6

 

Here we are with the board attached (and the two washer in place) and after a bit of diagnosis with the multi-meter.  To the right are the wire connectors that bring power from the from the pickups and wheels of each truck.  RATHER confusing on my loco, the wire colors are switched: on one truck, the red is the outside rail and the black the center, but on the other, the black is outside and red is center.  Not important though, 'cause you don't need to fuss with them.  The leftmost two clips go to the power leads to the motors.

Slide7

 

I simply snipped the black lead from one and a red lead from the other and tied them together . . . the motors are now in series.

Slide8

 

I reassembled the loco and only then noticed a potential problem.  I;m certain this damage came from the factory.  I pushed the roller and its pin back in and resolved to fix it later, but go ahead and test the loco now.  

 

Slide9

 

Here is a very short video of it running.  Those who have one, unmodified, with the motors still in parallel, will appreciate how much slower it is running.  this is the very first time I fired it up and I think with practice I could adjust it slower still, but this is a good speed.   I ran it only this distance in deference to the very bad roller.  I have a spare somewhere and will replace it later this afternoon.

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Last edited by Lee Willis
Original Post

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Suprised to see motors in truck blocks.

Leaves lots of room for ERR Cruise and Sound and maybe even a larger speaker. 

What about Electro-Couplers? Original couplers appear to be body mounted with little room between mount and truck.

How easy is it to open the truck blocks to gain access to the motors? 

Are there traction tires?

Last edited by ctr
Originally Posted by L.I.TRAIN:

Lee

Overall not an electronics person, what benefit do you expect from this conversion?

Steve

Steve, as Lee said in his original post:   Those who have one, unmodified, with the motors still in parallel, will appreciate how much slower it is running.  this is the very first time I fired it up and I think with practice I could adjust it slower still, but this is a good speed.  

 

 

Lee, I'm impressed... You don't waste anytime before you get into these projects. This isn't the first time you've been the FIRST person to make a post about some sort of modification you've made to a newly issued product.

 

I admire your willingness to repaint, kitbash, modify, and improve trains to your liking. When I saw the photo of your mini-GP from the RMT BEEP shells placed on a K-Line S-2 frame, I was impressed. I had thought I was the only person who had done such a thing.

 

And for those who consider themselves unqualified for such projects, all I can say is you never learn until you get started. Begin with something simple, like a Plasticville kitbash, and as your skill level (and confidence) begin to rise, you might surprise yourself in how much you CAN do.

 

Yes, there are some real skilled modelers on this forum, but don't compare your abilities and work to theirs. Use their project ideas as a goal or aiming point, and work to your own level.

 

And of course, guys like Lee and AMCDave, make some project a little easier to approach as they have walked through them with posts about them on this forum.

Here it is on the workbench (cluttered because I interrupted another project in mid-stream to do this).

 

That's funny... you always seem to have 3 or 4 things going on at the same time.  Thank you for sharing.

 

I have a WBB switcher I hated because it it ran so fast.  If you lowered the volts to get the train to run anywhere near the correct speed the sound would not work.  I upgraded it to PS2 and swore I'd never buy a WBB  ever again.

 

You may have given me reason to consider them again.  If this is a common issue, why don't they wire them in series at the factory?

 

Ron

 

Not to hijack this excellent thread, but can someone point me any info about modifying the S2 K-Line switcher? This sounds really interesting, and I've already got the parts to do it. I've tried a search with a bunch of different catch words, but cant find anything.
 
Originally Posted by brianel_k-lineguy:

I admire your willingness to repaint, kitbash, modify, and improve trains to your liking. When I saw the photo of your mini-GP from the RMT BEEP shells placed on a K-Line S-2 frame, I was impressed. I had thought I was the only person who had done such a thing.

Originally Posted by Dtrainmaster:

All those convenient plug-ins.......ready for the Bluetooth upgrades.

 

Lee how about a video without the train noise in order to get a better idea of the sound file. I would like to know if it's as good as the one paired with the Bachmann N-scale version.

 

Dave

The other thread I have, sort of a review of the 44-tonner, has a video of it running, as it is here.  The problem as I discuss in my comments on it in that other thread is that I can't hear the motor noise when it is running - its not much loader than the wheel/roling noise the loco makes.  At idle its okay, but . . . 

Originally Posted by gceno:

Thanks Lee. Very nice tutorial. Do you know why the manufacturers wire the electronics in parallel? It seems to me they should do it in series and if anyone wants a speeder they can rewire it.

^ ^  This relates to my question.  

 

Any chance you did any sort of load test before changing to series?  While I think this is a nice, quick and dirty way to slow the engine, and I've seen quite a few threads about doing this on various dual motored locos, wouldn't the end result be a significant loss of pulling power, as from the motor's point of view they are only getting half voltage?  It may be a non-issue if the thing has plenty of pull anyway.  The idea piqued my curiosity as I've been fiddling here and there with a Pulse Width Modulation device to slow conventional engines without significant loss of pulling power. 

You just need to cut one motors ground and the other motors positive wire and connect them. 

So instead of the first motors ground being a ground, instead it is a hot lead which will then power the next motor and that motors ground will complete the circuit. 

 

I think I will do this to my Lionel NJ Transit switcher. That thing is just ridiculously fast in parallel.

Originally Posted by JohnGaltLine:

...wouldn't the end result be a significant loss of pulling power

I think you miss the point.  The issue isn't pulling power, but rather jackrabbit starts.  As long as you have the track voltage range to get the motors up to a decent voltage in series, you'll still have plenty of pulling power.  The issue being addressed is the fact that you can't start low enough in the power curve to have good low speed performance.

 

Originally Posted by gunrunnerjohn:
Originally Posted by JohnGaltLine:

...wouldn't the end result be a significant loss of pulling power

I think you miss the point.  The issue isn't pulling power, but rather jackrabbit starts.  As long as you have the track voltage range to get the motors up to a decent voltage in series, you'll still have plenty of pulling power.  The issue being addressed is the fact that you can't start low enough in the power curve to have good low speed performance.

 

Well, that was more or less, what I was asking.  I was just curious, if it significantly reduced pulling power.  As for the voltage range, I would expect most people to max out around 18VAC, which would put about 9 volts to the motors  in series.  The only loco I have to play with on this is a NW2 switcher I added a second motor to, and it tends to stall when pulling 2 or 3 post war cars at anything less than 10 volts. I'm not attacking the idea, just looking for more information.  

Originally Posted by JohnGaltLine:
Originally Posted by gunrunnerjohn:
Originally Posted by JohnGaltLine:

...wouldn't the end result be a significant loss of pulling power

I think you miss the point.  The issue isn't pulling power, but rather jackrabbit starts.  As long as you have the track voltage range to get the motors up to a decent voltage in series, you'll still have plenty of pulling power.  The issue being addressed is the fact that you can't start low enough in the power curve to have good low speed performance.

 

Well, that was more or less, what I was asking.  I was just curious, if it significantly reduced pulling power.  As for the voltage range, I would expect most people to max out around 18VAC, which would put about 9 volts to the motors  in series.  The only loco I have to play with on this is a NW2 switcher I added a second motor to, and it tends to stall when pulling 2 or 3 post war cars at anything less than 10 volts. I'm not attacking the idea, just looking for more information.  

Yes, in theory, wiring the motors in series reduces the maximum amount of power the loco can produce: so if you intend to routinely pull 60 scale reefers up a 2.5 % grade, I would not wire the motors in series.  (You won't pull that many with the 44 tonner anyway, it doesn't have the traction).

 

Electric motors are  very non-linear things in some regards.  Most of the time, mine never run hard, as one can determine like this: run the loco with no train behind it.  Then run it at that same voltage with the train.  If it runs about the same speed either way, and mine always do, you are not working the motors hard, you are running them under conditions where they back-EMF, so to speak, is defining the RPM they run at.  

 

Even when pulling 25 scale reefers or flats and gondolas - or nine to ten 18" passenger cars, a typical two-engine diesel is working at only 25% - 40% of capability.  I view this a good thing  This means it is running cool and will have a long, trouble-free lifetime. 

 

With the 44 tonner, I don't think you can work the motors hard.  I tried to get a photo of this you could see, but could not: when pulling nine scale reefers and a caboose, as in the video below, if I start it at 14 volts, it spins its wheels for a second or two until it gets going: in other words, at 14 volts, even with its motors in series, it has more power than traction. 

 

And let's remember it is a switcher, and a tiny one at that.  If I had a E9 that was going to pull a full twelve-car Super Chief, I might not do this series mod, but a switcher will a) never go fast, and b) won't pull a lot of cars.  

 

In the video below, the 44 tonner is running at 8 volts, and using about 1 amp doing so, according to my ZW-L gauges. It will run slower, down to 7 volts, but below 8 volts, I can hear the sound volume, which is low under the best of circumstances, drop a lot.  Above 8 volts more voltage doesn't seem to increase volume, but between 7 and 8 it increases noticeably.  I view this as its slowest satisfactory speed, and it pulls these nine reefers and caboose around curves and up a slope (60 inch here) as much as two degrees with no problems. 

 

At eight volts.  Not a great video but I was operating the power supply with the other hand. 

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Last edited by Lee Willis
Originally Posted by George Zander:

Why doesnt Williams wire them in series from the factory if they run better that way?

Thanks Lee for posting how to do that, I always wondered and want to do that to my Williams Engines.

Does that affect, any future ERR upgrades?

 

The correct fix would be to gear them lower. That would not only slow them down but also increase the torque.

ERR cruise won't work with motors in series but the engine will run slower with cruise even with parallel motors.

 

Pete

Well, they turn smoothly.  They appear to be the same size motor as in 'Streets vehicles and clown cars and I do not feel perceptible cogging (I'm pretty sure I know what you mean) but I was feeling it by turning the flyweel with my finger with the gears and wheels still attached, and that might mask it.    

 

They have a very small flywheel and the thing runs slowly, smoothly, but, on my BEEPWorld loop, it really slows going up, and racse down, the slopes - it really varies speed with slope more than most . . . more than a BEEP by a good deal.  Not sure what that means vis a vis for cruise (other than it is needed) although it occurs to me it means a good deal of throttle variation would be required .  I'm under the impression that cruise systems work with about a three volt band for control variation.  I would think that would be enough, but . . 

 

Only way to see how well cruise goes is to try . . . and the worst that will happen is that you waste some time, then remove the boards after it doesn't work and use them somewhere else and have to run the loco witouth it.  (I realize the worst that could happen is to ruin the loco, burn out the boards, and make a mess of the whole thing.  But I sort of doubt you'd let that happen!

Last edited by Lee Willis

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