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       #Post#: 2588--------------------------------------------------
       Smoke not puffing 
       By: danweikert Date: December 1, 2020, 7:51 pm
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       Hi everyone. For some reason my lionel 681 is not puffing smoke.
       The smoke unit itself is working but its not puffing. If anyone
       has any ideas or tips that would be great. Thank you :)
       #Post#: 2589--------------------------------------------------
       Re: Smoke not puffing 
       By: TrainLarry Date: December 1, 2020, 9:00 pm
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       Take out the smoke unit, disassemble it and scrape out any old,
       hardened pellet material. Clean the entire unit with Naphtha.
       Make sure the air hole through the top of the cylinder into the
       bottom of the heater bowl is clear.
       Make sure the heater element is intact with no broken wires, and
       no wires touching each other. Install a new smoke unit liner.
       Reassemble the unit and assemble it to the loco. Apply power to
       just the heater, add a pellet or liquid smoke fluid, and move
       the smoke lever by hand to see if the unit smokes.
       Larry
       #Post#: 2591--------------------------------------------------
       Re: Smoke not puffing 
       By: danweikert Date: December 1, 2020, 10:13 pm
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       by any chance would you know how i would find a replacement part
       ( a new smoke unit ) like a speific part number. Thank you  :)
       #Post#: 2593--------------------------------------------------
       Re: Smoke not puffing 
       By: TrainLarry Date: December 2, 2020, 8:58 am
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       The complete smoke unit is #671-170.
       Available here,
 (HTM) https://store.justtrains.com/671-170-Smoke-Unit_p_124.html
       and the smoke unit converted for smoke fluid
 (HTM) http://www.ttender.com/weblistpictures/671-170.jpg
       is here.
 (HTM) http://www.ttender.com/list/num4.htm
       Larry
       #Post#: 2594--------------------------------------------------
       Re: Smoke not puffing 
       By: danweikert Date: December 2, 2020, 9:01 am
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       Thank you :)
       #Post#: 2599--------------------------------------------------
       Re: Smoke not puffing 
       By: danweikert Date: December 2, 2020, 11:44 am
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       So i did a bit of diagnosing. I took off the shell and ran it
       just a few inches. I noticed that the arm that goes up and down
       to puff the smoke does in fact move. Which leads me to believe
       that if the smoke unit is still smoking I simply need a new
       smoke unit. Does this sound like it make sense. Im new to this
       hobby so I consider this a learning experience haha. Let me
       know. Thanks everyone :) God bless
       #Post#: 2600--------------------------------------------------
       Re: Smoke not puffing 
       By: danweikert Date: December 2, 2020, 11:48 am
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       one more question, would you recommend replacing the smoke lever
       and piston as well?
       #Post#: 2602--------------------------------------------------
       Re: Smoke not puffing 
       By: TrainLarry Date: December 2, 2020, 3:52 pm
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       If no parts of the smoke unit are damaged, the only parts that
       may need to be changed are the heater element 671-225
 (HTM) http://www.ttender.com/weblistpictures/671-225.jpg
       and the smoke chamber liner 671-221
       Available here.
 (HTM) http://www.ttender.com/list/num4.htm
       Turn the smoke unit upside down after taking the piston out and
       the top cover off, and notice a small hole in the cylinder that
       goes into the smoke chamber. Make sure the hole is clear.
       Reassemble the smoke unit with new parts and you should be
       smoking in no time at all.
       Larry
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