Large Scale Central

LGB 23191 Mogul always derails running backwards on R1 curves

I have 4 LGB moguls including the #23191 below which is the newest.

All of my moguls will run backwards through R1 curves just fine except this one. The tender on this one always derails running backwards through the tighter curves. Any ideas? Thanks

Did you check the gauge of the wheels on the tender?

Front truck of the tender, right?

The drawbar is most likely binding.
LGB uses a floppy hook into a hoop on the tender truck.

I’ve had the bind before.

All I can suggest from this remote loacation is to compare mounting and free-play of all front tender truck and drawbar hoop and engine hooks between the problem loco and one that is not a problem.

TOC

Curmudgeon said:
Front truck of the tender, right?

The drawbar is most likely binding.
LGB uses a floppy hook into a hoop on the tender truck.

I’ve had the bind before.

All I can suggest from this remote loacation is to compare mounting and free-play of all front tender truck and drawbar hoop and engine hooks between the problem loco and one that is not a problem.

TOC


Yes, it is the front truck that derails.

timmyd said:
I have 4 LGB moguls including the #23191 below which is the newest.

All of my moguls will run backwards through R1 curves just fine except this one. The tender on this one always derails running backwards through the tighter curves. Any ideas? Thanks

Don’t run backwards thru R1 curves. :slight_smile: Just a thought

What did you find when you carefully compared this to another that did not derail?

Curmudgeon said:
What did you find when you carefully compared this to another that did not derail?
I needed to rebuild one of my servers last evening so that took precedence. However, what I did discover is that the trucks on the tender in question are very loose. I recall that when I purchased this mogul new from the local train shop in the area I was having some difficulty with it then. A fella that no longer works at the local store took it in the shop and I believe "equalized" the trucks on the tender. There is no play or movement on any of my other mogul tenders but there is a ton of it on this one. It appears that some longer screws were used to aid in the "equiliazation" of the tender so that the truck screws cannot screw down tight. I could be smoking crack here... but I think that is the issue.

Okay!

The newer Moguls had equalized trucks, but that generally isn’t a bad thing…

Unless he really unscrewed something up, should be fixable!

TOC

Curmudgeon said:
Okay!

The newer Moguls had equalized trucks, but that generally isn’t a bad thing…

Unless he really unscrewed something up, should be fixable!

TOC


Perhaps I should bring it by?

Yeah, I can look it over, figure out what we need to do.

Sometimes a washer to eliminate the equalization is all we need.

I’ll be here most of today, if not all.

Tomorrow is Ops, so if ya wanna do some ops, come between 1400-2000.

Curmudgeon said:
Yeah, I can look it over, figure out what we need to do.

Sometimes a washer to eliminate the equalization is all we need.

I’ll be here most of today, if not all.

Tomorrow is Ops, so if ya wanna do some ops, come between 1400-2000.


TOC, sent you an email

I definitely would start with checking gauge. I had a very tempermental tender on my Mogul and last month I checked the tender wheels. They were as they were when I got it new and the gauge wasn’t even close.
The wheels on my tender were adjustable and I carefully adjusted them and the problem was solved.

timmyd said:
Curmudgeon said:
Yeah, I can look it over, figure out what we need to do.

Sometimes a washer to eliminate the equalization is all we need.

I’ll be here most of today, if not all.

Tomorrow is Ops, so if ya wanna do some ops, come between 1400-2000.


TOC, sent you an email

While that is true, I have personally yet to see an LGB wheelset out far enough to be an issue.

Conform to G1MRA and nmra?
Never.

Bachmann?

How about an SD-45?

Anyway, on my 1st and 2nd run Moguls, it was so bad backing a train, I built new drawbars from brass 20 years ago.

They screw to the tab on the loco, and fit over the truck kingpin.

No more twisting as you back up.

“Don’t run backwards thru R1 curves. :slight_smile: Just a thought”

Good one Peter!

Have Fun: Jeff

Damn… now besides this one Mogul not able to backup through an R1 curve I have another Mogul (older Mogul) 2028D that has no problem with R1 curves but refuses to make it through the R1 switches (both left and right).

I can’t make out exactly what is happening but the tender derails and comes unhooked with the loco everytime. All my other moguls can traverse the R1 switches just fine. TOC, looks like I will be bringing 2 moguls by to you.

Tim,
Take along the switch and some track, also.
It will help Doctor Curmudge make a better diagnostic evaluation.
j

Check the level of the R1 switch.

If the swicth is not level on all three ends and the frog is not level then you will this problem.

Suggest getting a small bubble level and mount it on a flat board about 3 x 6 inches. Place on top of the rail at each end of the switch and the frog and check for level between the rails. Adjust if necessary and one of your issues should go away.