Hi John,
 If you are looking for Crawler info, you might check out  <!-- w --><a class="postlink" href="http://www.olivercletrac.com">www.olivercletrac.com</a><!-- w -->    This is Zimmerman's web site and the sure know Oliver and Cletrac crawlers. They are located in Pennsylvania .... you could be there in a day!  Also, if you check out the LINKS section of this web site, there are several other crawler sites  you may be interested in. 
 If you can post either a picture or can find the serial# or model #, there are folks on here that could tell you more about the machine. Sounds like a fun project!
                            enjoy,
                         Cal[/b]