Posted 3/3/2019 09:16 (#7355744 - in reply to #7355293) Subject: RE: Tractor ID (pics)
Southern Colorado
That is an earlier D-4 Cat as others have said because of the fender mount fuel tank. Later Cats had 1/2 plate fenders rather than stamped lighter gauge fenders.
Edit to add. I am wrong on it being a D-4, I think Now_What pegged it by identifying where the track frame pivots.