Dear Stephan,

Thank you for your prompt reply. Yes, you are right.
I just called Bachman customer service today and sadly they said my Liberty Bell Special set doesn't smoke :-(

Anyways, regarding the "pilot truck/wheels have a small spring under them" that you mentioned, I don't see it there.
Mine is more like a teeter-mechanics.... and the wheel supposed to "fall" onto the rails without any spring's pressure.

Also, I discovered that the smoke fluid was just absorbing through the gaps of the locomotive and then drops onto the rail... make it a bit wet. Maybe that's why it keeps falling out... I tried to dry it up and now seems to be back to stable.

Thanks again Stephan and nice day to everyone.

I would check back this forum often.
Phan

Dear everyone,

I just got a Bachmann HO Scale - Liberty Bell Special.
And I dont know why but the original pack doesn't have the Smoke Liquid with it.
Anyways, I set up the rails and the train goes smoothly..

Today, after like 1 week untouched, I am back to the set.

01. I find out that after 2 or 3 rounds at maximum speed, the first pair of wheels in the locomotive (the directing wheel, I guess) has the TENDENCY TO GOES OFF THE RAILS I don't know why but I fix again every wheel, make sure they are all on the right track, then the train go smoothly couple rounds, at slow speed. And then I speed up a bit by abit, it's still very smooth. But in the maximum speed, after a little while (3-4 rounds), the directing wheels comes off the rail... this is weird, because the first time I set it up a week a go, everything was fine and smooth.

02. I just got a Smoke Fluid from Ebay (authentic Bachmann), I put on 10 drops and NO SMOKE coming out. I wait until it drid up, use the QTip to clean over the whole making sure no any leaft over liquid. And tried again with 20 then 5 drops... But no any smoke coming out  ???too... (Also, the reason why I don't have the original fluid container is that it did not come with the original pack, even though the instruction paper did mention about it)

So someone experienced please kindly give me advice, I would appreciate!
Thanks!

PS: Sorry for my bad English