This might amuse all you tractor enthusiasts.
I'm not a tractor man but my friend Charlie Schroeder is. He recently
restored an International Harvester TD18a (a BIG job!). He told me the
story of his ordeal as he tried to scavenge and recreate old parts and
arcane tractor knowledge.... and wouldn't you know, I came up with a
song about it.
You can hear it at:

http://www.garageband.com/artist/DennisDoyle

Click on "OLD TRACTOR" and you can see a picture of the old treaded
beast AND hear an MP3 of the song.
I hope you like it.
Dennis Doyle