CAT D-9 CAT D-9 Model Taking Shape, Updates for Week of 12/07/2020 by Don CampbellDecember 12, 2020December 12, 2020 Below are my CAT D-9 model updates for the week. Have a great week! CAT D-9 rear winch progress Dec 5th CAT-D9 air cleaners and front blade side beams CAT D-9 exhaust stack air cleaners More CAT D-9 Model Updates CAT D-9 1/6 Scale Dozer Step-by-Step process – Weekly Update for 12/4/2020