I photographed these Tractor Tugs at various museums and airport events.
In addition to Clark examples, there are other possibilities like Harlan and Tug
Clarktor-like tractor … but different than a Clarktor-6 (not sure what model)
Olympic Flight Museum 2016
Olympic Flight Museum 2018
Olympia 2022
Olympia, Wash. 2025
Clarktor-like tractor … but different than a Clarktor-6 (not sure what model)
Olympic Flight Museum 2018
I believe this one was just painted overall tan between these two showsOlympic Flight Museum 2019
Clarktor-like tractor … but different than a Clarktor-6 (not sure what model)
Olympic Flight Museum 2019
Tractor Tug, unidentified
Erickson Collection; Madras 2023
Tractor Tug, unidentified
While searching to identify this type, I found a pic taken at a Canadian museum that seems to match. Key elements that differ from a Clarktor are the large rear fender.