yes I did. Didny make any difference.

Thanks Jonathan. I will strip it again and go through with a keen eye.

I have a few of the 2-8-0 consolidations. I have two that don't run silently. The only way I can describe them is that when they run they make like a whirring noise . I have not done a thing to the nylon gears or belt. Just very annoying to hear this  noise. It seems to get louder when  going around the curves and also under load.
I have tried lubricating with grease, but still no go .

Words of wisdom will be appreciated

Thanks Rich

I recently purchased a new 2-8-0 chassis assembly . It is fitted with an Led headlight. My previous ones have normal incandescent lamps . Would these LEDs be ok with 12 Volts or do I need to connect a resistor in line? I have a wow sound decoder fitted with 12 v output .
Regards Peter