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I have a never used newly found engine from Sunset Models 3rd Rail . It is a NYC Hudson cab # 5002 made in February 2003. The instruction sheet says “ Check the switches under the tender,  Set to Run. “. The only switch that I see under the tender reads “ reverse unit.  on/ off “.  What does this switch actually do?  I would guess that it is for the sounds in the tender but I don’t understand what it means by reverse unit.  Can I test run the engine in conventional without the tender?  The engine does have a switch labeled “ smoke    conventional , off, tmcc  “ that I would assume is the run program switch and smoke on off switch combined. Does that sound correct?

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The tender switch is the Run/Program switch.  I believe "On" is Program but I'm not positive.  The 3-position smoke switch is for smoke only.  In Conventional it feeds track power to the heating element, in TMCC it feeds power to the heating element via the TMCC board in the tender and Off feeds no power to the heating element.  In the TMCC position, AUX1, 9 turns smoke on and repeated 9's increases smoke while AUX1, 8 turns smoke off.

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