The Antique Caterpillar Machinery Owners Club (ACMOC) was founded in 1991 by a small group of enthusiasts who all shared a similar passion, the legacy of antique Caterpillar machinery. At the time, they had no idea that their club would one day grow to have thousands of members all around the world.

Now based in Peoria, Illinois, ACMOC's mission is to assist and educate its members, and the general public, to appreciate the historic role of Caterpillar machinery in shaping the world. ACMOC promotes the collection, preservation, restoration, display, and study of products and memorabilia of Caterpillar and its related predecessors.

Whether you own antique Caterpillar machinery, or simply have an interest in the history behind it, ACMOC offers something for everyone. Through our full-color magazine, shows, local chapters, and bulletin board, members enjoy the camaraderie of shared interests.


Membership Benefits

  • Quarterly magazine filled with content about antique Caterpillar machines
  • FREE classified listings
  • ACMOC store discounts and specials

$40 /year Electronic

$55 /year USA

$67 /year International


ACMOC Office is Moving to a New Location

The ACMOC office is moving to a new physical loaction during the week of April 5-9 so will be closed as we get things moved and set up.   Same mailing address and phone number as current but just a new office space in our "new-to-us" home.  

We're changing phone providers so there may be some short periods of time when the phone is not working but that should be only a few hours as the number is ported from the current provider.  If you have any problems with getting through, please try again or send an email to This email address is being protected from spambots. You need JavaScript enabled to view it..  

We should be up and running when the office reopens with regular business hours on Tuesday, April 13 at 9am Central time. I'll return phone messages as soon as possible after that date.   

Thank you for your patience as we make this transition.  

Save The Date for the 2021 ACMOC National Show

We are looking forward to the 2021 ACMOC National Show to be held at C.J. Moyna & Sons in Elkader, Iowa, from September 17-19, 2021.   Plans are well underway for a great show including working antique Cat equipment, tours of the facilities and much, much more! More details (lodging and banquet information) will be included in ACMOC Magazine issue 154-coming soon.   

We hope you'll be able to attend. Please register to let us know you're coming at:

If you need any help with the registration process, please contact the ACMOC office and we'd be glad to take care of that for you.  

Golf carts will be available for rent with advance reservation on registration or you can bring your own if you'd prefer.  (No other vehicles other than golf carts please)



No events
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Chapter Nineteen
May 01 - May 02, 2021
Lake Goldsmith, Vic
Morton Antique Tractor Event
Chapter Twenty
June 11 - June 13, 2021
Morton, IL
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