A video demonstrating how to maintain and clean postwar American Flyer motive power [https://www.youtube.com/watch?v=XQIJWTjP6Ks] recommends that interfaces between copper wheels and steel axles as well as those between copper contact “brushes” and steel axles be lubricated with a conductive contact lubricant such as Bachmann E-Z Lube. I have an American Models K4 Pacific loco and tender which was modified for DCC operation. As shown in the attached photos, the loco’s trailing truck is equipped with what appears to be a brass wheelset; both of the tender’s trucks [the front truck only is depicted in the photo] feature one steel wheelset and two wheelsets made of copper. Is it necessary to use E-Z- Lube [or a comparable product] at the above-mentioned non-ferrous contact locations on my loco and tender?
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