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I’ve never installed anything internal on a Lionel locomotive - much less even disassembled one - but now I am about to install an ERR Cruise Commander M on my very heavy TMCC Virginian Allegheny. Given the mass and size of this beast what is the best and safest way to separate the body from the chassis? Is there some service manual available? I don’t want to risk damaging anything.

I’ve read the electronic installation manual for the CC-M but it only pertains to the wiring and board installation and not about accessing it. I’ve searched YouTube and this forum but so far I’ve not found a specific ‘How to…’ to do this?

Looking at the Allegheny Manual in the maintenance section it shows screw locations on the underside (but are there others?)  but what is the best way to remove them and then flip everything back over? For example, after the screws that are accessible underneath are removed should I attempt to lift the chassis off the shell inverted or should I gently flip everything back over together then lift the shell up and off? Are there any accessories that may still be attached (smoke unit etc?) or even wiring attached to the shell and cab area?

I have no idea on how to do this so I’m hoping the experts on here that have done this before can help me avoid any pitfalls.

Thanks in advance for any help and advice!

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Last edited by Raven87
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I believe that may be one with a harness looped over the crossmember for the front power truck.  I know some of them you have to take the front power truck off using that one screw and unplug one or two plugs to remove it.  Newer ones come apart intact.

Is there any way to verify this? I have never done a disassembly on a locomotive before and am worried I may screw something up because I do not know what it is that I don’t know - but should.

Last edited by Raven87

Since I don't currently have one of these to look at, I can't verify it.  I have repaired and upgraded a few of these over the years, and I didn't have any problem getting them apart.  I had one recently for a Super-Chuffer installation, and I don't remember any issues doing the upgrade.  However, not all of the articulated stuff comes apart exactly the same way, so there's sometimes a wrinkle or two.

Just had mine apart several times doing upgrades.  Yes, 4 screws to get the body off (2 at cab, 2 at first set of steam chests).  First though, I'd remove the front set of drivers (big flat head screw, then push down gently and slide towards rear of locomotive).  I don't recall about the front pilot, but those are generally one screw if you need to remove it.  I might be forgetting something, but it was much easier than I had thought it would be.  It was my first upgrade on a modern locomotive, so I had it apart a dozen times getting it to all work.  It does now though, and I'm quite pleased.

Yes, that is the screw to remove the front power truck.  It's also hooked inside so you'll have to slide it a bit to unhook it.  Also, the drive shaft coupling will slide off, to allow you to remove the truck.

How does the coupling reconnect during reassembly? Or is that done before the shell is reattached? I’ve never seen the inside of one of these so I’m not sure what to expect.

Last edited by Raven87
@Burl posted:

Just had mine apart several times doing upgrades.  Yes, 4 screws to get the body off (2 at cab, 2 at first set of steam chests).  First though, I'd remove the front set of drivers (big flat head screw, then push down gently and slide towards rear of locomotive).  I don't recall about the front pilot, but those are generally one screw if you need to remove it.  I might be forgetting something, but it was much easier than I had thought it would be.  It was my first upgrade on a modern locomotive, so I had it apart a dozen times getting it to all work.  It does now though, and I'm quite pleased.

Thank you.
How about reassembly? Gunrunner John mentioned the drive coupling sliding off etc., how hard is it to put the front truck back on? Is that done before the shell is put back on?

I have the C&O version of that engine. To disassemble:

  • Remove the large screw that connects the front engine to the rear engine.
  • Move the front engine rearward until you can unhook the L shaped hanger from the bracket inside the engine. Be careful not to loose the conical shaped washer and spring. Pull the front engine up and forward (this will disconnect the drive shaft) until you can see a connector with wires. Pull the connector apart and the front engine can be removed and set aside.
  • Remove the 2 screws in the cylinders on the rear engine. Remove the 2 screws at the front of the firebox. You should be able to remove the frame from the boiler now by pulling them apart. If they don't want to come apart you may need to use a flat bladed screwdriver to gently pry them apart at the firebox.
  • Once you can remove the boiler you will have to disconnect the wires going to the handrails (that's the antenna). Should be a yellow wire nut. Gently pull the cab light out of the backhead. I also think you have to pull apart the wire connector at the smoke unit as the smoke unit is mounted to the boiler.

Look out for other wires that may connect the frame to the boiler. It's been a while since I've had mine apart so I might have missed something. Take pictures as you take it apart so you if you don't remember how to put it back together, the pictures will help. Above all- take your time.

As articulated engines go this one is fairly simple to get apart. There aren't any wires for marker lights and number boards to contend with.

Ken

Thank you all! This is the most expensive locomotive that I have bought so far - and I’m probably overly cautious because it is now my favorite even though it’s not a Legacy - so I appreciate every bit of advice all of you have given me.

So, I was able to get the shell off easily enough and yes there was a connector to the front truck as you guys mentioned. I took a lot of pics (these are only some of them!) for reference but because I have the foam cradle I was able to lay the shell onto it without disconnecting any other wires yet. Should I disconnect everything from the shell?

A couple of items… 1) when I lifted the shell off the light for the cab light (maybe the firebox glow?) was already exposed as you can see in one of the pics just behind the motor. And 2) is there anything else I should disconnect (other than what is needed for the CC-M installation) that will make this easier?


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Does anyone have a TMCC Allegheny specific CC-M installation instruction sheet? The only one I found on ERR’s website is a generic version.

Obviously the CC-M replaces this board but is there a particular sequence to remove the old board and transfer all those plugs to the new one? This is the current one in my locomotive.

While I am a reasonably well educated person with solid mechanical skills, the importance of this process being done correctly is not lost on me. So, reading the ‘generic’ installation instructions seemed very intimidating because I did not see much about the mechanics of the plug and play (the ‘unplug/plug then play’!) removal and installation details?

Did I miss something?



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Last edited by Raven87

There are no written instructions for that specific locomotive that I know of.  Really, since it currently has the DCDR, they should be really simple.

Remove the DCDR, simply unplug the two plugs and mechanically remove it from the heatsink.

Install the CC-M on the same heatsink, make sure you use some heatsink compound on the FET drivers.

Plug the two plugs you removed from the DCDR into the CC-M.

Plug the 10-pin connector into the CC-M, run the wire from pin 1 of the 10-pin connector to pin 24 of the R2LC socket.  Don't solder it to the R2LC board, you may want to swap that later, solder it to the motherboard.

Job done.

See shot below, pin #24 of the R2LC is indicated by the arrow.  Solder the serial data lead from the CC-M to the matching socket pin, probably under the motherboard for this model.

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There are no written instructions for that specific locomotive that I know of.  Really, since it currently has the DCDR, they should be really simple.

Remove the DCDR, simply unplug the two plugs and mechanically remove it from the heatsink.

Install the CC-M on the same heatsink, make sure you use some heatsink compound on the FET drivers.

Plug the two plugs you removed from the DCDR into the CC-M.

Plug the 10-pin connector into the CC-M, run the wire from pin 1 of the 10-pin connector to pin 24 of the R2LC socket.  Don't solder it to the R2LC board, you may want to swap that later, solder it to the motherboard.

Job done.

See shot below, pin #24 of the R2LC is indicated by the arrow.  Solder the serial data lead from the CC-M to the matching socket pin, probably under the motherboard for this model.

Hi John,

I really have to plead ignorance because all those acronyms familiar to experienced tech gurus like yourself are really Greek to me. Same with the Generic instruction sheet for the CC-M.
Yes, it sounds very easy but I’m not experienced in electronics tech so therefore it’s very complicated. Something like Heat sink compound I’ve never heard of much less used; same with acronyms like R2LC, DCDr, etc. I have no idea what those are or what exactly they are or their location.

I apologize for my glaring lack of knowledge but this is my absolutely first time I’ve ever looked under the shell of a locomotive. I’ve been searching and reading but this is a huge learning experience for me.

I really appreciate your patience and assistance! I will get it done!

You have the parts identified correctly.

@Raven87 posted:

Is there any source where a novice like me can learn about the internal electronics (and how they work/what they do) of these locomotives? I really dislike feeling so ignorant!

Sadly, it's the same as many other endeavors, it's a gradual learning process.  OJT is the way a lot of us learned initially.  Once you're been around the block a few times, you start to understand more about the internals.  The TMCC models are fairly simple for the most part, some of the more sophisticated Legacy models get a little more convoluted.  Then there's the whole MTH DCS side of the fence...

There are wiring diagrams for "Typical" models.  For your Allegheny, the "Typical 2-6-6-4 Articulated Steam, Non-Odyssey)" would be fairly close, and will certainly give you an idea of the internal wiring.  It's in this: Lionel TMCC Representative Locomotive Schematics.pdf file.

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Thank you so much John.
My CC-M arrives today and I can’t wait to get to work on it.
Are there just the four screws (2 per side) at the bottom to remove the DCDR plus two plugs to disconnect? I’m asking because it looks like there might be more than 2 plugs into the board in the pics below?
Or different screws? And what/where are the FET drivers?

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Last edited by Raven87

John can you clarify this? My CC-M was delivered late this evening so I haven’t unboxed it yet but I’m not sure ‘how’ to solder the serial data wire to the matching socket pin/motherboard vs the R2LC because I’m not 100% sure what I’m looking for to do that?

I understand the wire goes to the Pin 24 location etc but how do I do this right the first time? Is the ‘underside of the motherboard’ easily accessible? Again, I’m sorry that this is so unfamiliar to me! It won’t be the next time  

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@Strummer posted:

Wow, this is a great discussion; very similar (in some ways) to the question I asked in regards to the C&O 2-6-6-2 #28075.

Perhaps I should have started my thread in this category... 🙂

Glad you got it done Steve. 👍

Mark in Oregon

Thanks Mark. Im glad the CC-M is in and look forward to doing the the other mods too. It was definitely a huge learning experience. I think I’m going to post a thread this weekend about how to do this (with the pics I took) for a complete novice like me. Just getting this massive, very heavy locomotive apart was a very intimidating challenge much less replacing electronics!
Thank goodness for this forum and especially people like John(!!!), Ken, Burl and the others who chimed in!
And - what an improvement!
Thanks again!

Last edited by Raven87

IMO, adding cruise is one of the biggest incremental improvements you can make for locomotives that don't have it.  I've added several dozen CC-M modules to my TMCC locomotives that came without it, what an improvement!  Other than the small motorized units that have the small Mini Commander II sized boards, all my stuff has cruise if possible.  I still have a couple of Pulmore motored locomotives, obviously those don't get cruise.

It is like you said John, it is a night and day difference in the personality of the Locomotive. It went from being a very nice and well detailed unit to a true locomotive with much more character and especially realism that is a great experience to watch and operate.
The difference is absolutely incredible! So now I’m really looking forward to adding The Chuff-Generator and the Super-Chuffer II.

Being kind of a big smoke guy, I'm partial to the smoke function.   With the Super-Chuffer, you also get an automatic Rule-17 LED headlight and an automatic cab light control.  Part of the fun will be getting the LED in that wedge headlight, took me a few to develop my technique for lighting those with an LED.

Sounds awesome and challenging. The headlight definitely needs the LED upgrade so if that comes with it all the better! I’m sure I’ll have questions for that install too. 😉

Does the bulb and necessary wiring come with the kit?

Last edited by Raven87

I can't go giving you all my secrets, nobody will want upgrades!

Actually, the stuff for the LED headlight does not come with the Super-Chuffer, that's "locally sourced".  It's really just a surface mount LED and some fine wire.  You can actually buy the SMT LED's with wires attached, that makes the job a bit easier.

Haha! Thanks John.

Does ‘SMT LED’ mean a surface mount LED or does the SMT refer to something else?
Would I just splice the wires into the ones going to the incandescent or is more required?

Last edited by Raven87

The control type for this one should be AUX1/4 after setting the ID, then you're all set.  My Virginian Allegheny also got a Super-Chuffer for smoke control, it's a great looking and performing locomotive now.

Well, I must admit I thought I understood this but now I’m not sure. Looks like more OJT…😬
I use my Legacy 990 Cab2 for control and it offers four settings for Control Type etc. Thought it might be simple. But…
To clarify (and the instructions are not clear about this IMO either) do I need to reset my locomotive ID number? Even though it’s already set in my Cab2? (This would be using the Program/Run switch process etc?)

Then, when I scroll to set Control Type on my Cab2, I should hit Aux 1 then the number 4, or depress 4 simultaneously when I depress the Aux1 button on the handheld? What will I see on the Cab2 then? Will the speed step graph be visible?

Lastly, Should I COMPLETELY disregard the four built in settings in the Cab 2 (CAB1, TMCC, R100, Legacy) altogether?

Thanks in advance. Man, nothing is EVER as easy as I thought it would be!

Last edited by Raven87

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