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SN Scale locomotive couplers [Arnold]


3 posts

I am in dire need of engine couplers for two Arnold/Hornby Uboat diesel n scale engines. Upon removing the shell, which calls for the removal first of the couplers from each end to install the DCC module, the couplers self fell apart. I have no way to reinstall the engine(s) shell. I have tried Micro Trains website but nothing is clear enough to ascertain the size of each coupler. i did buy some body mount couplers, but alas they were to wide. I would appreciate any information from anyone that knows of where and what to buy to replace these missing couplers.

If your Arnòld loco was originaly fitted with knuckle couplers I see no reason why Micro Trains couplers would not make a suitable replacement.


37 posts


I would suggest a quick call or email to our office in Tacoma. They handed the U-Boat model and have lots of spare parts in their warehouse. Hopefuly including the one you need.


For speed, I'd check the leaflet in the box for which part number you need to ask for.


Train Support: TechSupport@hornby.us  1.877.358.6405 x114


3 posts

Yes I have Mico Trains couplers. Problem was the opening for each coupler was way too small. I had to file out a quite large opeing before the couplers would pass through. I didn't want to do this, but I have since done some major cutting and filing to make the Micro Trains coupler fit. 

4wd action

3 posts

the locomotive should have nem pockets

4wd action

3 posts

depends on what year the model is


1 post

4wd action is right the loco should nem pockets


420 posts


@4wd action


The U-boat is from 2015/16. Exactly what NEM standard would you expect the couplers on this model of a US N scale prototype to adhere to?




Hopefully you have managed to get the Microtrains coupler to operate successfully. If not, then an Accumate might work. I found this Arnold U25c/28c review quite interesting with coupler details part way through. It also mentions the challenges of removing the body and not losing the coupler springs!


There was also some discussion on this forum about the U25c in the past.


3 posts

I have been around the world trying to find replacement couplers. No one can help and in some cases just didn't responed to my request for help. Ive been to the U.K. U.S.A. and China going to every place everyone has recommended and to no avail. I give up and going to simply trash the two locomotives. From now on I will only buy from companies that can provide customer support and Arnold is not one of them..  

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