U-Boat Derailments

Joe Danna Jr
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Post by Joe Danna Jr » Sun Jul 23, 2006 11:21 pm

This is my third season with a GRR. Things have settled nicely even though it has been so rainy. I am having problems with derailments of my U-Boats. I run SD-45's, -9's. Malletts, Mikado's all with out problems. When I go to rum my U-Boats they derail time and time again, on switches, crossovers and/or curves. All my curves are 10' diameter, the turnouts are Ariso wide radius,and U-Boats are all weighted to the max. Any thoughts as to what I can do differently to keep these running?
Thanks Joe

Bob Johnson
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Post by Bob Johnson » Sun Jul 23, 2006 11:26 pm

I just got 2 u boats this year at ECLSTS, and wehen I put them on the top shelf of my rolling rack, I noticed wires showing where I felt wires should not show.

While I haven't had frequent derailments, I suspect the wires are constraining the truck swing. Could that be your problem?

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Thom Filbert
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Post by Thom Filbert » Mon Jul 24, 2006 1:35 am


I had a similar experience with my U-25B. What I found out was the ‘U’ boat likes track that is very level. especially on curves that are uphill. When I leveled my track (side to side) I’ve had no more problems with derailments.


Joe Mascitti
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Post by Joe Mascitti » Mon Jul 24, 2006 4:03 am

My 2 uboats ended up as decorative pieces on sidings...would not stay on the track at all..I figured I'd cut my fustration level and just use them as show...all my other engines are fine...don't know what the deal is with the U-boats...


Jon D. Miller
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Post by Jon D. Miller » Mon Jul 24, 2006 4:11 am

Check track cross level, as mentioned. Also, sounds like the U-Boats are suffering from a lack of side bearing. Put a little side bearing in both trucks and they should track just fine.

Joe Danna Jr
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Post by Joe Danna Jr » Mon Jul 24, 2006 10:44 am

Thanks All
Jon.....What is a side beqaring and how is it installed?

R.J DeBerg
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Post by R.J DeBerg » Mon Jul 24, 2006 12:06 pm

John: as suggested, check out the underside of the loco for wire connections that have to much wire hanging out. Also I noticed that the quick conectors are hanging out and causing the trucks to bind up. May have to remove the shell and re position the wires. Later RJD

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Ron Wenger
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Post by Ron Wenger » Mon Jul 24, 2006 5:47 pm

If you do remove the shell, I recomend backing off the screws that hold the A frame on three or four turns. The U boats like level track because they are long and do not have the flex in them that some of the newer locomotives have built in. Once you get these tuned to the track so to speak they are usually pretty good runners.


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Post by Mike » Tue Jul 25, 2006 5:49 pm

same problem w/mine...changed the truck pivot point to slotted hole & made round only & wa-la tracks fine !!!

Phil Lathroum
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Post by Phil Lathroum » Tue Jul 25, 2006 6:06 pm

can you give a slightly better explanation of that... mine likes to jump off in some spots also...


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