This is one of the early Ds modified for indutrial work. It has hard rubber tires, dual 50x10 rears and the optional AD355R lighting equipment. The tractor also has a AD103R muffler/spark arrestor on the exhaust. If you've ever seen a D run at night, you know why, a whole lot of sparks come out the exhaust (sometimes starting fires). It is pulling a No. 6 Adams Road Maintainer. The picture is from 1926.
See another early industrial D, here.

See more pictures of Adams Graders, Here


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