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A customer approached me about converting his older USRA 2-6-6-2 to LEGACY with whistle steam. Lionel has done this engine before so a lot of the parts are “plug and play”  but ill end up having to design some smoke unit parts as usual. Lionel used two separate smoke units. Ill be using the DSMK. Lets see how this goes! 

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Last edited by Bruk
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Bruk, dumb question for you.  I have a locomotive with dual smoke in for repair.  For the life of me, I can't figure out how to keep smoke from bleeding between the chambers.  The result is, smoke gets forced out the intake holes of the inactive side.  The gasket looks good, and I've stuffed a very solid piece of felt to fill the lower gap and still let fluid soak through, but I still have the issue.

Have you ever had this, and what do you do to correct it?

Soft@gunrunnerjohn posted:

Bruk, dumb question for you.  I have a locomotive with dual smoke in for repair.  For the life of me, I can't figure out how to keep smoke from bleeding between the chambers.  The result is, smoke gets forced out the intake holes of the inactive side.  The gasket looks good, and I've stuffed a very solid piece of felt to fill the lower gap and still let fluid soak through, but I still have the issue.

Have you ever had this, and what do you do to correct it?

John,  I have had similar issues. Judging from what you said the most common issue I found that was the lower gap to transfer fluid between chambers. I have also had to add a soft liquid goo to seal the upper gasket to that divider and smoke unit body. I have had the impeller air pressures leak into each others intakes. I have also “resurfaced” the smoke unit body like a head on a engine . I found many smoke unit tops warped with low spots. I lay a large file flat on the table and work the smoke unit surface till its flat. I usually do this every time I work with a smoke unit Dual or single chambered. 

There will always be a very small leak because of the gaps between the fibers of wicking. But there shouldn't be a large amount if smoke to leak through. 

Last edited by Bruk

Bruk, I was considering my gasket material for the top seal.  The bottom I put some pretty dense felt into it, I figured that should stop most airflow, but obviously I could be wrong.   You can't get the original material, or I'd try that.

I'm going to take a look at the smoke unit top and see if a resurface job might be called for.

This is a truly dumb design, I wonder what genius at Lionel came up with this idea!

 

This is a truly dumb design, I wonder what genius at Lionel came up with this idea!

That's a little harsh...

Well it's been there since the run of PRR #6498 2-10-4 Texas class.  I have that locomotive and repacked the smoke unit once.  Took me a long time to get it where the chuffing unit was forcing smoke from the cylinder steam hole.  Trial and error.  That was 2011 when that was released so they've been around for a while.  I think Mike helped me but I can't remember what the solution was.  @Mikado might know some tricks to help yinz guys.

Last edited by MartyE

This is a truly dumb design, I wonder what genius at Lionel came up with this idea!

Truth be told I think the same. I am in the works on the side of a re-design of Lionels DSMK, I hate how the exhaust holes aren’t centered of the unit but on the sides. 

The funnels that Lionel designed for some engines clog with fluid so easily because due to the sharp change in direction. Such as their legacy Scale Berk and Y6b engine

Hence why my funnels that I designed are not constricted and “flow”. 

Last edited by Bruk
@Bruk posted:

The funnels that Lionel designed for some engines clog with fluid so easily because due to the sharp change in direction. Such as their legacy Scale Berk and Y6b engine

Hence why my funnels that I designed are not constricted and and “flow”. 

I'd love to have a replacement for the JLC Challenger, the funnel on that one is terrible!  They put a flat pancake affair on it and then molded a huge wedge into the diecast shell hoping that would properly direct the smoke.  News flash, it doesn't!

I'd love to have a replacement for the JLC Challenger, the funnel on that one is terrible!  They put a flat pancake affair on it and then molded a huge wedge into the diecast shell hoping that would properly direct the smoke.  News flash, it doesn't!

Agreed. Any early TMCC loco with dual stacks are pretty much the same all around. Ill come up with a fix just for you....eventually! 

@Bruk posted:

Update!!! Part(s) are Here! 

I needed yet another custom designed and 3D Printed smoke funnel. This is what I came up with. I call it the “Universal DSMU Funnel Assembly” made it so I can trim the height of the exhaust as needed. Able to withstand 350°F according to Shapeways. 

Time to start grinding and drilling to fit in the shell. 

Do you know what material they printed those out of? 

Update:

So, after some grinding and some hole drilling, I got the smoke unit installed. Whistle steam elbow made. The shell is all wired up. The lights work as they should. The smoke output is amazing.

I need help!

I ran into a problem of course. During my testing, I was running the loco. Then it stopped. I lost all command. I thought maybe my legacy base got disconnected. Nope. I hit the reset button for the engine, nothing, it just sat there. The headlight wasn’t flickering.

I cycled the power, got the loco to move again, ran about 2 inches then stopped. No control again. I swapped the RCMC out with another and I still have the same issue. I thought maybe my handrails were grounding out so I used my meter, nothing. It was running fine with the shell off. Makes me think its a radio signal issue due to a grounding problem. I dunno. 

Usually I’m the one with the fix 😂

 

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Last edited by Bruk

Issue Solved????

So after about 3 hours...I cleaned my track (again) checked/my serial data wire from my command base. Solder the radio board to the actual board (Lionel does that now). Replaced the Prog/Run switch. This improved but didn’t solve the issue. 

I took apart the handrails and found the insulators that go through the shell had corrosion (I’m guessing left over flux from when they soldered the wires to hand rails) dripping onto the shell casting creating a very faint “short”. 
 
I removed the insulators through the shell and soldered fresh wire on them, then added a thick layer of heat-shrink to act as a new insulator....its working as of right now...I’m going to continue some more testing, and remove the shell a few more times to make sure that I fixed the problem.
 
But its very promising this was the issue. 
Last edited by Bruk
@harmonyards posted:

I’d want to believe even a “faint short” is gonna show up with a meter......believe me, I’m glad you found the issue....just curious how you did the initial test of the handrails and found them to be ok the first go-around?....I’m on a quest to learn...

Pat

The meter I have is a Fluke 87.

I originally was measuring with the “beeping” circuit feature which quickly finds “shorts”. When I turned that feature off this time around, I can measure down to Milli-ohms. I was getting readings which I should not have. This pointed me to finding the corrosion issue.

I also tested every pin in all my connectors to all the frames of the loco, thats where I found a weird reading with the program/run switch and swapped it out. 

Last edited by Bruk

Bruk, now that can only be described as a glorified PITA. I didn't really believe it could be a track being dirty issue, but given some of the responses I've seen from the regular folk like myself, that is usually where they're directed to start.

I do remember some years back before I joined up here on the forum that I was told about insulation on the handrails being essential for operation. Who would have ever thought corrosion would be the factor here? Certainly not me.

Reminds me of a story my uncle told me once, about how they had a racecar on the track, and it would sputter something bad on the straightaways, but no issues on the turns(1950's). All the big heads couldn't figure it out for naught. My uncle said they called over one of the local kids who worked at the track to take a look. Didn't take him long. He replaced the fuel line with a wider size line and the car ran without issue. The big heads never even considered the gas line was to narrow to allow the fuel to flow smoothly.

I think of all of you guys working on these engines in that regard. You get in there and slowly work it down to what the real issue is giving you grief. Lord knows I would bring it into the LTS and tell them all I could and they'd probably figure it out. Me, I'd put my finger in the outlet, lol.

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