Battery change on Big Hauler?

[JONLARSON]

Please help out an old Grandpa.  I pulled our old battery powered Big Hauler steam locomotive train set out of the closet after many years after our son grew up and left. 

I am setting it up for my new grandson for Christmas.  The batteries are DEAD.  I can not figure out how to change them out.   Can someone please instruct me.
Thank you.   Grandpa Larson

[Joe Satnik]

Hi, Jon.

http://www.bachmanntrains.com/home-usa/board/index.php/topic,3181.0.html

Hope this helps.

Sincerely,

Joe Satnik