Rail King 4-6-4 Hudson Steam Locomotive Operator's Manual download pdf (Page 4)

Premier J1e Hudson Steam Locomotive

Ensuring Proper Power to Track Polariy

Changing Track Polarity Inside the Locomotive

Figure 4: Changing the polarity with the locomotive polarity switch

For 2-rail DCS operation, it is important that the polarity from the transformer to the

engine is properly configured. Correct polarity can be accomplished by ensuring that

the wiring from the TIU to the track and orientation of the locomotive when sitting on

the track follows the illustration in Figure 3.

Failing to properly configure the

polarity will result in the

locomotive starting in reverse

instead of forward or not receiving

the DCS signal. Should this occur,

it is not necessary to swap the

wires from the transformer to the

track or reverse the locomotive’s

orientation on the track itself.

Instead, simply slide the polarity

switch located under the tender as

seen in Figure 4.

DCS Polarity Switch

Figure 3: Proper 2-Rail polarity wiring and locomotive orientation

To TIU Black Terminal

To TIU Red Terminal

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Rail King 4-6-4 Hudson Steam Locomotive Operator's Manual Page 4