@Loochy88 posted:Interesting! I had been following this process from the manual I downloaded... Pictured in this post. Is perhaps 740 a misprint? I may switch the boards back and try again at some point.
Also, is there a parts diagram somewhere of this engine that confirms which board was originally included? I'm just curious if you all are referencing a parts manual that's available or if you are speaking from experience regarding c08 being correct? (Not doubting anyone, just trying to learn)
It's a misprint. The 740 code is used for exactly two locomotives which contain the original, non-modular form of the AD20 board in the tender. The correct code for your Mikado is definitely 74.
I could have sworn that an illustrated parts break-down was completed for those locomotives, but I'm not finding it online. But there is a photographic record shown on the parts order page. I never trust these 100%, but that list is showing a R2LC-C08.
TRW