The Antique Caterpillar
Machinery Owners Club, a site dedicated to antique Caterpillar equipment. They have a popular bulletin
board and many knowledgeable people will respond to a question posted there.
Antique Tractors Online Website.
link is to IB Dozing. They have forums and are dedicated to the preservation, maintenance and use of all makes and types of old construction equipment.
Heavy Construction Equipment Association
Antique Tractor Support Group and Information Site
Costex Tractor Parts
Used Parts Suppliers
resource for finding parts
Thill Track and Tractor
Clack's Old Caterpillars
Dene's Crawler Page
Walter "Walt" Cheatham.
Jim's Crawler and Bulldozer Photo Site
Bill's Classic Caterpillars