Many thanks for the info.  This is my second Climax so I am aware of the chuff problem. The spacing for the
decoder and speaker is really tight.  Hopefully I can get everything in.  The round speaker is about 1/8 too big.
Thanks again
Dick

Does Bachmann sell or recommend a speaker for the 70 ton 3 truck Climax engine?  Mine came with a
Bachmann decoder and no speaker. I have a Tsunami decoder for it but the speaker space is very small.

Thanks, it is DCC ready.  I will look for the resistor on the PC board.

Does anyone know the voltage of the bulbs installed in the 80 ton 3 truck shay at the factory?
I have a new one that I want to to convert to DCC and need to know if I will need a resistor for the LEDs