How do you navigate Olsens Toy Train website?

 Check their library. That is where diabrams are. If not there someone can post a pic.

Use this link:  Olsen's Library    to go directly to the library.

Start here at their Library index: http://www.olsenstoy.com/searchcd1.htm

Then click "Lionel Whistles/Tenders"

Then click "6466W"

Then select the page you want to view (In the case of the 6466W, there is one single parts listing page - no diagram). Don't fret yet! Gong back to the index, instead of selecting 6466W, there is a generic listing "Whistles". Select that - That has 8 pages of diagrams and service hints applicable to almost any postwar whistle tender!

This is a prewar 2666W may be the same except yours may have a plastic housing

Thank you all for your help.  When I was trying before, I was never actually in the Library I guess.  I was just trying to search or use the menu on the left of the page where it says Lionel, American Flyer, Ives, etc.  

Once you guys pointed me to the library, it is fairly intuitive.  Thanks again, you guys are great!

JD