If no parts of the smoke unit are damaged, the only parts that may need to be changed are the heater element 671-225
http://www.ttender.com/weblistpictures/671-225.jpg
and the smoke chamber liner 671-221
Available here.
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